| /******************************************************************************* |
| * Copyright (c) 2000, 2015 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| * IBM Corporation - added J2SE 1.5 support |
| *******************************************************************************/ |
| package org.eclipse.wst.jsdt.core; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| import org.eclipse.wst.jsdt.core.compiler.CharOperation; |
| import org.eclipse.wst.jsdt.internal.compiler.lookup.TypeBinding; |
| import org.eclipse.wst.jsdt.internal.compiler.parser.ScannerHelper; |
| import org.eclipse.wst.jsdt.internal.core.util.Util; |
| |
| |
| /** |
| * Provides methods for encoding and decoding type and method signature strings. |
| * <p> |
| * This class provides static methods and constants only; it is not intended to be |
| * instantiated or subclassed by clients. |
| * </p> |
| * |
| * Provisional API: This class/interface is part of an interim API that is still under development and expected to |
| * change significantly before reaching stability. It is being made available at this early stage to solicit feedback |
| * from pioneering adopters on the understanding that any code that uses this API will almost certainly be broken |
| * (repeatedly) as the API evolves. |
| */ |
| public final class Signature { |
| |
| /** |
| * Character constant indicating the semicolon in a signature. |
| * Value is <code>';'</code>. |
| */ |
| public static final char C_SEMICOLON = ';'; |
| |
| /** |
| * Character constant indicating the colon in a signature. |
| * Value is <code>':'</code>. |
| * 3.0 |
| */ |
| public static final char C_COLON = ':'; |
| |
| /** |
| * Character constant indicating result type void in a signature. |
| * Value is <code>'V'</code>. |
| */ |
| public static final char C_VOID = 'V'; |
| |
| |
| /** |
| * Character constant indicating any type in a signature. |
| * Value is <code>'A'</code>. |
| */ |
| public static final char C_ANY = 'A'; |
| |
| /** |
| * Character constant indicating the dot in a signature. |
| * Value is <code>'.'</code>. |
| */ |
| public static final char C_DOT = '.'; |
| |
| /** |
| * Character constant indicating the dollar in a signature. |
| * Value is <code>'$'</code>. |
| */ |
| public static final char C_DOLLAR = '$'; |
| |
| /** |
| * Character constant indicating an array type in a signature. |
| * Value is <code>'['</code>. |
| */ |
| public static final char C_ARRAY = '['; |
| |
| /** |
| * Character constant indicating the start of a resolved, named type in a |
| * signature. Value is <code>'L'</code>. |
| */ |
| public static final char C_RESOLVED = 'L'; |
| |
| |
| /** |
| * Character constant indicating a compilation unit. |
| * Value is <code>'X'</code>. |
| */ |
| public static final char C_COMPILATION_UNIT = 'X'; |
| |
| |
| /** |
| * Character constant indicating the start of an unresolved, named type in a |
| * signature. Value is <code>'Q'</code>. |
| */ |
| public static final char C_UNRESOLVED = 'Q'; |
| |
| /** |
| * Character constant indicating the end of a named type in a signature. |
| * Value is <code>';'</code>. |
| */ |
| public static final char C_NAME_END = ';'; |
| |
| /** |
| * Character constant indicating the start of a parameter type list in a |
| * signature. Value is <code>'('</code>. |
| */ |
| public static final char C_PARAM_START = '('; |
| |
| /** |
| * Character constant indicating the end of a parameter type list in a |
| * signature. Value is <code>')'</code>. |
| */ |
| public static final char C_PARAM_END = ')'; |
| |
| /** String constant for the signature of result type void. |
| * Value is <code>"V"</code>. |
| */ |
| public static final String SIG_VOID = "V"; //$NON-NLS-1$ |
| |
| public static final String SIG_ANY = "A"; //$NON-NLS-1$ |
| |
| public static final String SIG_COMPILATION_UNIT = "X"; //$NON-NLS-1$ |
| |
| /** |
| * Kind constant for a class type signature. |
| * @see #getTypeSignatureKind(String) |
| * |
| */ |
| public static final int CLASS_TYPE_SIGNATURE = 1; |
| |
| /** |
| * Kind constant for a base (primitive or void) type signature. |
| * @see #getTypeSignatureKind(String) |
| * |
| */ |
| public static final int BASE_TYPE_SIGNATURE = 2; |
| |
| /** |
| * Kind constant for an array type signature. |
| * @see #getTypeSignatureKind(String) |
| * |
| */ |
| public static final int ARRAY_TYPE_SIGNATURE = 4; |
| |
| public static final char[] VOID = "void".toCharArray(); //$NON-NLS-1$ |
| public static final char[] ANY = "any".toCharArray(); //$NON-NLS-1$ |
| |
| private static final Map BASE_TYPES = new HashMap(); |
| static { |
| // B -> ??? |
| BASE_TYPES.put('C', String.valueOf(TypeBinding.CHAR.readableName())); // C -> char |
| BASE_TYPES.put('D', String.valueOf(TypeBinding.DOUBLE.readableName())); // D -> double |
| BASE_TYPES.put('F', String.valueOf(TypeBinding.FLOAT.readableName())); // F -> float |
| BASE_TYPES.put('I', String.valueOf(TypeBinding.INT.readableName())); // I -> int |
| BASE_TYPES.put('J', String.valueOf(TypeBinding.LONG.readableName())); // J -> long |
| BASE_TYPES.put('S', String.valueOf(TypeBinding.SHORT.readableName())); // S -> short |
| BASE_TYPES.put('Z', String.valueOf(TypeBinding.BOOLEAN.readableName())); // Z -> boolean |
| } |
| |
| private Signature() { |
| // Not instantiable |
| } |
| |
| private static int checkName(char[] name, char[] typeName, int pos, int length) { |
| if (CharOperation.fragmentEquals(name, typeName, pos, true)) { |
| pos += name.length; |
| if (pos == length) return pos; |
| char currentChar = typeName[pos]; |
| switch (currentChar) { |
| case ' ' : |
| case '.' : |
| case '[' : |
| case ',' : |
| return pos; |
| default: |
| if (ScannerHelper.isWhitespace(currentChar)) |
| return pos; |
| |
| } |
| } |
| return -1; |
| } |
| |
| /** |
| * Creates a new type signature with the given amount of array nesting added |
| * to the given type signature. |
| * |
| * @param typeSignature the type signature |
| * @param arrayCount the desired number of levels of array nesting |
| * @return the encoded array type signature |
| * |
| * |
| */ |
| public static char[] createArraySignature(char[] typeSignature, int arrayCount) { |
| if (arrayCount == 0) return typeSignature; |
| int sigLength = typeSignature.length; |
| char[] result = new char[arrayCount + sigLength]; |
| for (int i = 0; i < arrayCount; i++) { |
| result[i] = C_ARRAY; |
| } |
| System.arraycopy(typeSignature, 0, result, arrayCount, sigLength); |
| return result; |
| } |
| /** |
| * Creates a new type signature with the given amount of array nesting added |
| * to the given type signature. |
| * |
| * @param typeSignature the type signature |
| * @param arrayCount the desired number of levels of array nesting |
| * @return the encoded array type signature |
| */ |
| public static String createArraySignature(String typeSignature, int arrayCount) { |
| return new String(createArraySignature(typeSignature.toCharArray(), arrayCount)); |
| } |
| |
| /** |
| * Creates a method signature from the given parameter and return type |
| * signatures. The encoded method signature is dot-based. |
| * |
| * @param parameterTypes the list of parameter type signatures |
| * @param returnType the return type signature |
| * @return the encoded method signature |
| * |
| * |
| */ |
| public static char[] createMethodSignature(char[][] parameterTypes, char[] returnType) { |
| int parameterTypesLength = parameterTypes.length; |
| int parameterLength = 0; |
| for (int i = 0; i < parameterTypesLength; i++) { |
| parameterLength += parameterTypes[i].length; |
| |
| } |
| int returnTypeLength = returnType.length; |
| char[] result = new char[1 + parameterLength + 1 + returnTypeLength]; |
| result[0] = C_PARAM_START; |
| int index = 1; |
| for (int i = 0; i < parameterTypesLength; i++) { |
| char[] parameterType = parameterTypes[i]; |
| int length = parameterType.length; |
| System.arraycopy(parameterType, 0, result, index, length); |
| index += length; |
| } |
| result[index] = C_PARAM_END; |
| System.arraycopy(returnType, 0, result, index+1, returnTypeLength); |
| return result; |
| } |
| |
| /** |
| * Creates a method signature from the given parameter and return type |
| * signatures. The encoded method signature is dot-based. This method |
| * is equivalent to |
| * <code>createMethodSignature(parameterTypes, returnType)</code>. |
| * |
| * @param parameterTypes the list of parameter type signatures |
| * @param returnType the return type signature |
| * @return the encoded method signature |
| * @see Signature#createMethodSignature(char[][], char[]) |
| */ |
| public static String createMethodSignature(String[] parameterTypes, String returnType) { |
| int parameterTypesLenth = parameterTypes.length; |
| char[][] parameters = new char[parameterTypesLenth][]; |
| for (int i = 0; i < parameterTypesLenth; i++) { |
| parameters[i] = parameterTypes[i].toCharArray(); |
| } |
| return new String(createMethodSignature(parameters, returnType.toCharArray())); |
| } |
| |
| /** |
| * Creates a new type signature from the given type name encoded as a character |
| * array. The type name may contain primitive types, array types or parameterized types. |
| * This method is equivalent to |
| * <code>createTypeSignature(new String(typeName),isResolved)</code>, although |
| * more efficient for callers with character arrays rather than strings. If the |
| * type name is qualified, then it is expected to be dot-based. |
| * |
| * @param typeName the possibly qualified type name |
| * @param isResolved <code>true</code> if the type name is to be considered |
| * resolved (for example, a type name from a binary class file), and |
| * <code>false</code> if the type name is to be considered unresolved |
| * (for example, a type name found in source code) |
| * @return the encoded type signature |
| * @see #createTypeSignature(java.lang.String,boolean) |
| */ |
| public static String createTypeSignature(char[] typeName, boolean isResolved) { |
| return new String(createCharArrayTypeSignature(typeName, isResolved)); |
| } |
| |
| /** |
| * Creates a new type signature from the given type name encoded as a character |
| * array. The type name may contain primitive types or array types or parameterized types. |
| * This method is equivalent to |
| * <code>createTypeSignature(new String(typeName),isResolved).toCharArray()</code>, |
| * although more efficient for callers with character arrays rather than strings. |
| * If the type name is qualified, then it is expected to be dot-based. |
| * |
| * @param typeName the possibly qualified type name |
| * @param isResolved <code>true</code> if the type name is to be considered |
| * resolved (for example, a type name from a binary class file), and |
| * <code>false</code> if the type name is to be considered unresolved |
| * (for example, a type name found in source code) |
| * @return the encoded type signature |
| * @see #createTypeSignature(java.lang.String,boolean) |
| * |
| * |
| */ |
| public static char[] createCharArrayTypeSignature(char[] typeName, boolean isResolved) { |
| if (typeName == null || typeName.length == 0) |
| { |
| return new char[]{C_ANY}; |
| } |
| |
| int length = typeName.length; |
| StringBuffer buffer = new StringBuffer(5); |
| int pos = encodeTypeSignature(typeName, 0, isResolved, length, buffer); |
| pos = consumeWhitespace(typeName, pos, length); |
| if (pos < length) throw new IllegalArgumentException(new String(typeName)); |
| char[] result = new char[length = buffer.length()]; |
| buffer.getChars(0, length, result, 0); |
| return result; |
| } |
| private static int consumeWhitespace(char[] typeName, int pos, int length) { |
| while (pos < length) { |
| char currentChar = typeName[pos]; |
| if (currentChar != ' ' && !CharOperation.isWhitespace(currentChar)) { |
| break; |
| } |
| pos++; |
| } |
| return pos; |
| } |
| private static int encodeQualifiedName(char[] typeName, int pos, int length, StringBuffer buffer) { |
| int count = 0; |
| char lastAppendedChar = 0; |
| nameLoop: while (pos < length) { |
| char currentChar = typeName[pos]; |
| switch (currentChar) { |
| case '[' : |
| case ',' : |
| break nameLoop; |
| case '.' : |
| buffer.append(C_DOT); |
| lastAppendedChar = C_DOT; |
| count++; |
| break; |
| default: |
| if (currentChar == ' ' || ScannerHelper.isWhitespace(currentChar)) { |
| if (lastAppendedChar == C_DOT) { // allow spaces after a dot |
| pos = consumeWhitespace(typeName, pos, length) - 1; // will be incremented |
| break; |
| } |
| // allow spaces before a dot |
| int checkPos = checkNextChar(typeName, '.', pos, length, true); |
| if (checkPos > 0) { |
| buffer.append(C_DOT); // process dot immediately to avoid one iteration |
| lastAppendedChar = C_DOT; |
| count++; |
| pos = checkPos; |
| break; |
| } |
| break nameLoop; |
| } |
| buffer.append(currentChar); |
| lastAppendedChar = currentChar; |
| count++; |
| break; |
| } |
| pos++; |
| } |
| if (count == 0) throw new IllegalArgumentException(new String(typeName)); |
| return pos; |
| } |
| |
| private static int encodeArrayDimension(char[] typeName, int pos, int length, StringBuffer buffer) { |
| int checkPos; |
| while (pos < length && (checkPos = checkNextChar(typeName, '[', pos, length, true)) > 0) { |
| pos = checkNextChar(typeName, ']', checkPos, length, false); |
| buffer.append(C_ARRAY); |
| } |
| return pos; |
| } |
| private static int checkArrayDimension(char[] typeName, int pos, int length) { |
| int genericBalance = 0; |
| while (pos < length) { |
| switch(typeName[pos]) { |
| case ',' : |
| if (genericBalance == 0) return -1; |
| break; |
| case '[': |
| if (genericBalance == 0) { |
| return pos; |
| } |
| } |
| pos++; |
| } |
| return -1; |
| } |
| private static int checkNextChar(char[] typeName, char expectedChar, int pos, int length, boolean isOptional) { |
| pos = consumeWhitespace(typeName, pos, length); |
| if (pos < length && typeName[pos] == expectedChar) |
| return pos + 1; |
| if (!isOptional) throw new IllegalArgumentException(new String(typeName)); |
| return -1; |
| } |
| |
| private static int encodeTypeSignature(char[] typeName, int start, boolean isResolved, int length, StringBuffer buffer) { |
| int pos = start; |
| pos = consumeWhitespace(typeName, pos, length); |
| if (pos >= length) throw new IllegalArgumentException(new String(typeName)); |
| int checkPos; |
| char currentChar = typeName[pos]; |
| switch (currentChar) { |
| // primitive type? |
| case 'v': |
| checkPos = checkName(VOID, typeName, pos, length); |
| if (checkPos > 0) { |
| pos = encodeArrayDimension(typeName, checkPos, length, buffer); |
| buffer.append(C_VOID); |
| return pos; |
| } |
| break; |
| } |
| // non primitive type |
| checkPos = checkArrayDimension(typeName, pos, length); |
| int end; |
| if (checkPos > 0) { |
| end = encodeArrayDimension(typeName, checkPos, length, buffer); |
| } else { |
| end = -1; |
| } |
| buffer.append(isResolved ? C_RESOLVED : C_UNRESOLVED); |
| while (true) { // loop on qualifiedName[<args>][.qualifiedName[<args>]* |
| pos = encodeQualifiedName(typeName, pos, length, buffer); |
| checkPos = checkNextChar(typeName, '.', pos, length, true); |
| if (checkPos > 0) { |
| buffer.append(C_DOT); |
| pos = checkPos; |
| } else { |
| break; |
| } |
| } |
| buffer.append(C_NAME_END); |
| if (end > 0) pos = end; // skip array dimension which were preprocessed |
| return pos; |
| } |
| |
| /** |
| * Creates a new type signature from the given type name. If the type name is qualified, |
| * then it is expected to be dot-based. The type name may contain primitive |
| * types or array types. However, parameterized types are not supported. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * createTypeSignature("int", hucairz) -> "I" |
| * createTypeSignature("java.lang.String", true) -> "Ljava.lang.String;" |
| * createTypeSignature("String", false) -> "QString;" |
| * createTypeSignature("java.lang.String", false) -> "Qjava.lang.String;" |
| * createTypeSignature("int []", false) -> "[I" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeName the possibly qualified type name |
| * @param isResolved <code>true</code> if the type name is to be considered |
| * resolved (for example, a type name from a binary class file), and |
| * <code>false</code> if the type name is to be considered unresolved |
| * (for example, a type name found in source code) |
| * @return the encoded type signature |
| */ |
| public static String createTypeSignature(String typeName, boolean isResolved) { |
| return createTypeSignature(typeName == null ? null : typeName.toCharArray(), isResolved); |
| } |
| |
| /** |
| * Returns the array count (array nesting depth) of the given type signature. |
| * |
| * @param typeSignature the type signature |
| * @return the array nesting depth, or 0 if not an array |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| * |
| * |
| */ |
| public static int getArrayCount(char[] typeSignature) throws IllegalArgumentException { |
| try { |
| int count = 0; |
| while (typeSignature[count] == C_ARRAY) { |
| ++count; |
| } |
| return count; |
| } catch (ArrayIndexOutOfBoundsException e) { // signature is syntactically incorrect if last character is C_ARRAY |
| throw new IllegalArgumentException(); |
| } |
| } |
| /** |
| * Returns the array count (array nesting depth) of the given type signature. |
| * |
| * @param typeSignature the type signature |
| * @return the array nesting depth, or 0 if not an array |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| */ |
| public static int getArrayCount(String typeSignature) throws IllegalArgumentException { |
| return getArrayCount(typeSignature.toCharArray()); |
| } |
| /** |
| * Returns the type signature without any array nesting. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getElementType({'[', '[', 'I'}) --> {'I'}. |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeSignature the type signature |
| * @return the type signature without arrays |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| * |
| * |
| */ |
| public static char[] getElementType(char[] typeSignature) throws IllegalArgumentException { |
| int count = getArrayCount(typeSignature); |
| if (count == 0) return typeSignature; |
| int length = typeSignature.length; |
| char[] result = new char[length-count]; |
| System.arraycopy(typeSignature, count, result, 0, length-count); |
| return result; |
| } |
| /** |
| * Returns the type signature without any array nesting. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getElementType("[[I") --> "I". |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeSignature the type signature |
| * @return the type signature without arrays |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| */ |
| public static String getElementType(String typeSignature) throws IllegalArgumentException { |
| return new String(getElementType(typeSignature.toCharArray())); |
| } |
| /** |
| * Returns the number of parameter types in the given method signature. |
| * |
| * @param methodSignature the method signature |
| * @return the number of parameters |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| * |
| */ |
| public static int getParameterCount(char[] methodSignature) throws IllegalArgumentException { |
| if (methodSignature==null) |
| return 0; |
| try { |
| int count = 0; |
| int i = CharOperation.indexOf(C_PARAM_START, methodSignature); |
| if (i < 0) { |
| throw new IllegalArgumentException(); |
| } else { |
| i++; |
| } |
| for (;;) { |
| if (methodSignature[i] == C_PARAM_END) { |
| return count; |
| } |
| int e= Util.scanTypeSignature(methodSignature, i); |
| if (e < 0) { |
| throw new IllegalArgumentException(); |
| } else { |
| i = e + 1; |
| } |
| count++; |
| } |
| } catch (ArrayIndexOutOfBoundsException e) { |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| /** |
| * Returns the kind of type signature encoded by the given string. |
| * |
| * @param typeSignature the type signature string |
| * @return the kind of type signature; one of the kind constants: |
| * {@link #ARRAY_TYPE_SIGNATURE}, {@link #CLASS_TYPE_SIGNATURE}, |
| * {@link #BASE_TYPE_SIGNATURE}, or {@link #TYPE_VARIABLE_SIGNATURE}, |
| * or {@link #CAPTURE_TYPE_SIGNATURE} |
| * @exception IllegalArgumentException if this is not a type signature |
| * |
| */ |
| public static int getTypeSignatureKind(char[] typeSignature) { |
| // need a minimum 1 char |
| if (typeSignature.length < 1) { |
| // uknown return type |
| throw new IllegalArgumentException(); |
| } |
| char c = typeSignature[0]; |
| switch (c) { |
| case C_ARRAY : |
| return ARRAY_TYPE_SIGNATURE; |
| case C_RESOLVED : |
| case C_UNRESOLVED : |
| return CLASS_TYPE_SIGNATURE; |
| default : |
| if ("BCDFIJSVZA".indexOf(c) >= 0) { //$NON-NLS-1$ |
| return BASE_TYPE_SIGNATURE; |
| } |
| throw new IllegalArgumentException(String.valueOf(typeSignature)); |
| } |
| } |
| |
| /** |
| * Returns the kind of type signature encoded by the given string. |
| * |
| * @param typeSignature the type signature string |
| * @return the kind of type signature; one of the kind constants: |
| * {@link #ARRAY_TYPE_SIGNATURE}, {@link #CLASS_TYPE_SIGNATURE}, |
| * {@link #BASE_TYPE_SIGNATURE}, or {@link #TYPE_VARIABLE_SIGNATURE}, |
| * or {@link #CAPTURE_TYPE_SIGNATURE} |
| * @exception IllegalArgumentException if this is not a type signature |
| * |
| */ |
| public static int getTypeSignatureKind(String typeSignature) { |
| return getTypeSignatureKind(typeSignature.toCharArray()); |
| } |
| |
| /** |
| * Returns the number of parameter types in the given method signature. |
| * |
| * @param methodSignature the method signature |
| * @return the number of parameters |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| */ |
| public static int getParameterCount(String methodSignature) throws IllegalArgumentException { |
| return getParameterCount(methodSignature.toCharArray()); |
| } |
| |
| /** |
| * Extracts the parameter type signatures from the given method signature. |
| * The method signature is expected to be dot-based. |
| * |
| * @param methodSignature the method signature |
| * @return the list of parameter type signatures |
| * @exception IllegalArgumentException if the signature is syntactically |
| * incorrect |
| * |
| * |
| */ |
| public static char[][] getParameterTypes(char[] methodSignature) throws IllegalArgumentException { |
| try { |
| int count = getParameterCount(methodSignature); |
| char[][] result = new char[count][]; |
| if (count == 0) { |
| return result; |
| } |
| int i = CharOperation.indexOf(C_PARAM_START, methodSignature); |
| if (i < 0) { |
| throw new IllegalArgumentException(); |
| } else { |
| i++; |
| } |
| int t = 0; |
| for (;;) { |
| if (methodSignature[i] == C_PARAM_END) { |
| return result; |
| } |
| int e = Util.scanTypeSignature(methodSignature, i); |
| if (e < 0) { |
| throw new IllegalArgumentException(); |
| } |
| result[t] = CharOperation.subarray(methodSignature, i, e + 1); |
| t++; |
| i = e + 1; |
| } |
| } catch (ArrayIndexOutOfBoundsException e) { |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| /** |
| * Extracts the parameter type signatures from the given method signature. |
| * The method signature is expected to be dot-based. |
| * |
| * @param methodSignature the method signature |
| * @return the list of parameter type signatures |
| * @exception IllegalArgumentException if the signature is syntactically |
| * incorrect |
| */ |
| public static String[] getParameterTypes(String methodSignature) throws IllegalArgumentException { |
| char[][] parameterTypes = getParameterTypes(methodSignature.toCharArray()); |
| return CharOperation.toStrings(parameterTypes); |
| } |
| |
| /** |
| * Extracts the type variable name from the given formal type parameter |
| * signature. The signature is expected to be dot-based. |
| * |
| * @param formalTypeParameterSignature the formal type parameter signature |
| * @return the name of the type variable |
| * @exception IllegalArgumentException if the signature is syntactically |
| * incorrect |
| * |
| */ |
| public static String getTypeVariable(String formalTypeParameterSignature) throws IllegalArgumentException { |
| return new String(getTypeVariable(formalTypeParameterSignature.toCharArray())); |
| } |
| |
| /** |
| * Extracts the type variable name from the given formal type parameter |
| * signature. The signature is expected to be dot-based. |
| * |
| * @param formalTypeParameterSignature the formal type parameter signature |
| * @return the name of the type variable |
| * @exception IllegalArgumentException if the signature is syntactically |
| * incorrect |
| * |
| */ |
| public static char[] getTypeVariable(char[] formalTypeParameterSignature) throws IllegalArgumentException { |
| int p = CharOperation.indexOf(C_COLON, formalTypeParameterSignature); |
| if (p < 0) { |
| // no ":" means can't be a formal type parameter signature |
| throw new IllegalArgumentException(); |
| } |
| return CharOperation.subarray(formalTypeParameterSignature, 0, p); |
| } |
| |
| /** |
| * Returns a char array containing all but the last segment of the given |
| * dot-separated qualified name. Returns the empty char array if it is not qualified. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getQualifier({'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'O', 'b', 'j', 'e', 'c', 't'}) -> {'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g'} |
| * getQualifier({'O', 'u', 't', 'e', 'r', '.', 'I', 'n', 'n', 'e', 'r'}) -> {'O', 'u', 't', 'e', 'r'} |
| * getQualifier({'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l', '.', 'L', 'i', 's', 't', '<', 'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'S', 't', 'r', 'i', 'n', 'g', '>'}) -> {'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l'} |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param name the name |
| * @return the qualifier prefix, or the empty char array if the name contains no |
| * dots |
| * @exception NullPointerException if name is null |
| * |
| */ |
| public static char[] getQualifier(char[] name) { |
| int lastDot = CharOperation.lastIndexOf(C_DOT, name, 0, name.length-1); |
| if (lastDot == -1) { |
| return CharOperation.NO_CHAR; |
| } |
| return CharOperation.subarray(name, 0, lastDot); |
| } |
| /** |
| * Returns a string containing all but the last segment of the given |
| * dot-separated qualified name. Returns the empty string if it is not qualified. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getQualifier("java.lang.Object") -> "java.lang" |
| * getQualifier("Outer.Inner") -> "Outer" |
| * getQualifier("java.util.List<java.lang.String>") -> "java.util" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param name the name |
| * @return the qualifier prefix, or the empty string if the name contains no |
| * dots |
| * @exception NullPointerException if name is null |
| */ |
| public static String getQualifier(String name) { |
| char[] qualifier = getQualifier(name.toCharArray()); |
| if (qualifier.length == 0) return org.eclipse.wst.jsdt.internal.compiler.util.Util.EMPTY_STRING; |
| return new String(qualifier); |
| } |
| /** |
| * Extracts the return type from the given method signature. The method signature is |
| * expected to be dot-based. |
| * |
| * @param methodSignature the method signature |
| * @return the type signature of the return type |
| * @exception IllegalArgumentException if the signature is syntactically |
| * incorrect |
| * |
| * |
| */ |
| public static char[] getReturnType(char[] methodSignature) throws IllegalArgumentException { |
| // skip type parameters |
| if (methodSignature==null) |
| return CharOperation.NO_CHAR; |
| int paren = CharOperation.lastIndexOf(C_PARAM_END, methodSignature); |
| if (paren == -1) { |
| // could not be determined |
| return CharOperation.NO_CHAR; |
| } |
| // there could be thrown exceptions behind, thus scan one type exactly |
| int last = Util.scanTypeSignature(methodSignature, paren+1); |
| return CharOperation.subarray(methodSignature, paren + 1, last+1); |
| } |
| /** |
| * Extracts the return type from the given method signature. The method signature is |
| * expected to be dot-based. |
| * |
| * @param methodSignature the method signature |
| * @return the type signature of the return type |
| * @exception IllegalArgumentException if the signature is syntactically |
| * incorrect |
| */ |
| public static String getReturnType(String methodSignature) throws IllegalArgumentException { |
| return new String(getReturnType(methodSignature.toCharArray())); |
| } |
| /** |
| * Returns package fragment of a type signature. The package fragment separator must be '.' |
| * and the type fragment separator must be '$'. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSignatureQualifier({'L', 'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l', '.', 'M', 'a', 'p', '$', 'E', 'n', 't', 'r', 'y', ';'}) -> {'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l'} |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeSignature the type signature |
| * @return the package fragment (separators are '.') |
| * |
| */ |
| public static char[] getSignatureQualifier(char[] typeSignature) { |
| if(typeSignature == null) return CharOperation.NO_CHAR; |
| |
| char[] qualifiedType = Signature.toCharArray(typeSignature); |
| |
| int dotCount = 0; |
| indexFound: for(int i = 0; i < typeSignature.length; i++) { |
| switch(typeSignature[i]) { |
| case C_DOT: |
| dotCount++; |
| break; |
| case C_DOLLAR: |
| break indexFound; |
| } |
| } |
| |
| if(dotCount > 0) { |
| for(int i = 0; i < qualifiedType.length; i++) { |
| if(qualifiedType[i] == '.') { |
| dotCount--; |
| } |
| if(dotCount <= 0) { |
| return CharOperation.subarray(qualifiedType, 0, i); |
| } |
| } |
| } |
| return CharOperation.NO_CHAR; |
| } |
| /** |
| * Returns package fragment of a type signature. The package fragment separator must be '.' |
| * and the type fragment separator must be '$'. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSignatureQualifier("Ljava.util.Map$Entry") -> "java.util" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeSignature the type signature |
| * @return the package fragment (separators are '.') |
| * |
| */ |
| public static String getSignatureQualifier(String typeSignature) { |
| return new String(getSignatureQualifier(typeSignature == null ? null : typeSignature.toCharArray())); |
| } |
| /** |
| * Returns type fragment of a type signature. The package fragment separator must be '.' |
| * and the type fragment separator must be '$'. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSignatureSimpleName({'L', 'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l', '.', 'M', 'a', 'p', '$', 'E', 'n', 't', 'r', 'y', ';'}) -> {'M', 'a', 'p', '.', 'E', 'n', 't', 'r', 'y'} |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeSignature the type signature |
| * @return the type fragment (separators are '.') |
| * |
| */ |
| public static char[] getSignatureSimpleName(char[] typeSignature) { |
| if(typeSignature == null) return CharOperation.NO_CHAR; |
| |
| char[] qualifiedType = Signature.toCharArray(typeSignature); |
| |
| // int dotCount = 0; |
| // indexFound: for(int i = 0; i < typeSignature.length; i++) { |
| // switch(typeSignature[i]) { |
| // case C_DOT: |
| // dotCount++; |
| // break; |
| // case C_GENERIC_START: |
| // break indexFound; |
| // case C_DOLLAR: |
| // break indexFound; |
| // } |
| // } |
| // |
| // if(dotCount > 0) { |
| // for(int i = 0; i < qualifiedType.length; i++) { |
| // if(qualifiedType[i] == '.') { |
| // dotCount--; |
| // } |
| // if(dotCount <= 0) { |
| // return CharOperation.subarray(qualifiedType, i + 1, qualifiedType.length); |
| // } |
| // } |
| // } |
| return qualifiedType; |
| } |
| /** |
| * Returns type fragment of a type signature. The package fragment separator must be '.' |
| * and the type fragment separator must be '$'. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSignatureSimpleName("Ljava.util.Map$Entry") -> "Map.Entry" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param typeSignature the type signature |
| * @return the type fragment (separators are '.') |
| * |
| */ |
| public static String getSignatureSimpleName(String typeSignature) { |
| return new String(getSignatureSimpleName(typeSignature == null ? null : typeSignature.toCharArray())); |
| } |
| |
| /** |
| * Returns the last segment of the given dot-separated qualified name. |
| * Returns the given name if it is not qualified. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSimpleName({'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'O', 'b', 'j', 'e', 'c', 't'}) -> {'O', 'b', 'j', 'e', 'c', 't'} |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param name the name |
| * @return the last segment of the qualified name |
| * @exception NullPointerException if name is null |
| * |
| */ |
| public static char[] getSimpleName(char[] name) { |
| |
| int lastDot = -1; |
| int depth = 0; |
| int length = name.length; |
| lastDotLookup: for (int i = length -1; i >= 0; i--) { |
| switch (name[i]) { |
| case '.': |
| if (depth == 0) { |
| lastDot = i; |
| break lastDotLookup; |
| } |
| break; |
| } |
| } |
| |
| if (lastDot < 0) { |
| return name; |
| } |
| return CharOperation.subarray(name, lastDot + 1, length); |
| } |
| /** |
| * Returns the last segment of the given dot-separated qualified name. |
| * Returns the given name if it is not qualified. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSimpleName("java.lang.Object") -> "Object" |
| * </code> |
| * <code> |
| * getSimpleName("java.util.Map<java.lang.String, java.lang.Object>") -> "Map<String,Object>" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param name the name |
| * @return the last segment of the qualified name |
| * @exception NullPointerException if name is null |
| */ |
| public static String getSimpleName(String name) { |
| int lastDot = -1; |
| int depth = 0; |
| int length = name.length(); |
| lastDotLookup: for (int i = length -1; i >= 0; i--) { |
| switch (name.charAt(i)) { |
| case '.': |
| if (depth == 0) { |
| lastDot = i; |
| break lastDotLookup; |
| } |
| break; |
| } |
| } |
| if (lastDot < 0) { |
| return name; |
| } |
| return name.substring(lastDot + 1, length); |
| } |
| |
| /** |
| * Returns all segments of the given dot-separated qualified name. |
| * Returns an array with only the given name if it is not qualified. |
| * Returns an empty array if the name is empty. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSimpleNames({'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'O', 'b', 'j', 'e', 'c', 't'}) -> {{'j', 'a', 'v', 'a'}, {'l', 'a', 'n', 'g'}, {'O', 'b', 'j', 'e', 'c', 't'}} |
| * getSimpleNames({'O', 'b', 'j', 'e', 'c', 't'}) -> {{'O', 'b', 'j', 'e', 'c', 't'}} |
| * getSimpleNames({}) -> {} |
| * getSimpleNames({'j', 'a', 'v', 'a', '.', 'u', 't', 'i', 'l', '.', 'L', 'i', 's', 't', '<', 'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'S', 't', 'r', 'i', 'n', 'g', '>'}) -> {{'j', 'a', 'v', 'a'}, {'l', 'a', 'n', 'g'}, {'L', 'i', 's', 't', '<', 'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'S', 't', 'r', 'i', 'n', 'g'}} |
| * </code> |
| * </pre> |
| * |
| * @param name the name |
| * @return the list of simple names, possibly empty |
| * @exception NullPointerException if name is null |
| * |
| */ |
| public static char[][] getSimpleNames(char[] name) { |
| int length = name == null ? 0 : name.length; |
| if (length == 0) |
| return CharOperation.NO_CHAR_CHAR; |
| |
| int wordCount = 1; |
| for (int i = 0; i < length; i++) |
| switch(name[i]) { |
| case C_DOT: |
| wordCount++; |
| break; |
| } |
| char[][] split = new char[wordCount][]; |
| int last = 0, currentWord = 0; |
| for (int i = 0; i < length; i++) { |
| if (name[i] == C_DOT) { |
| split[currentWord] = new char[i - last]; |
| System.arraycopy( |
| name, |
| last, |
| split[currentWord++], |
| 0, |
| i - last); |
| last = i + 1; |
| } |
| } |
| split[currentWord] = new char[length - last]; |
| System.arraycopy(name, last, split[currentWord], 0, length - last); |
| return split; |
| } |
| /** |
| * Returns all segments of the given dot-separated qualified name. |
| * Returns an array with only the given name if it is not qualified. |
| * Returns an empty array if the name is empty. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * getSimpleNames("java.lang.Object") -> {"java", "lang", "Object"} |
| * getSimpleNames("Object") -> {"Object"} |
| * getSimpleNames("") -> {} |
| * getSimpleNames("java.util.List<java.lang.String>") -> |
| * {"java", "util", "List<java.lang.String>"} |
| * </code> |
| * </pre> |
| * |
| * @param name the name |
| * @return the list of simple names, possibly empty |
| * @exception NullPointerException if name is null |
| */ |
| public static String[] getSimpleNames(String name) { |
| return CharOperation.toStrings(getSimpleNames(name.toCharArray())); |
| } |
| |
| /** |
| * Converts the given method signature to a readable form. The method signature is expected to |
| * be dot-based. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * toString("([Ljava.lang.String;)V", "main", new String[] {"args"}, false, true) -> "void main(String[] args)" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param methodSignature the method signature to convert |
| * @param methodName the name of the method to insert in the result, or |
| * <code>null</code> if no method name is to be included |
| * @param parameterNames the parameter names to insert in the result, or |
| * <code>null</code> if no parameter names are to be included; if supplied, |
| * the number of parameter names must match that of the method signature |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param includeReturnType <code>true</code> if the return type is to be |
| * included |
| * @return the char array representation of the method signature |
| * |
| * |
| */ |
| public static char[] toCharArray(char[] methodSignature, char[] methodName, char[][] parameterNames, boolean fullyQualifyTypeNames, boolean includeReturnType) { |
| return toCharArray(methodSignature, methodName, parameterNames, fullyQualifyTypeNames, includeReturnType, false); |
| } |
| /** |
| * Converts the given method signature to a readable form. The method signature is expected to |
| * be dot-based. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * toString("([Ljava.lang.String;)V", "main", new String[] {"args"}, false, true) -> "void main(String[] args)" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param methodSignature the method signature to convert |
| * @param methodName the name of the method to insert in the result, or |
| * <code>null</code> if no method name is to be included |
| * @param parameterNames the parameter names to insert in the result, or |
| * <code>null</code> if no parameter names are to be included; if supplied, |
| * the number of parameter names must match that of the method signature |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param includeReturnType <code>true</code> if the return type is to be |
| * included |
| * @param isVargArgs <code>true</code> if the last argument should be displayed as a |
| * variable argument, <code>false</code> otherwise. |
| * @return the char array representation of the method signature |
| * |
| * |
| */ |
| public static char[] toCharArray(char[] methodSignature, char[] methodName, char[][] parameterNames, boolean fullyQualifyTypeNames, boolean includeReturnType, boolean isVargArgs) { |
| int firstParen = CharOperation.indexOf(C_PARAM_START, methodSignature); |
| if (firstParen == -1) { |
| throw new IllegalArgumentException(); |
| } |
| |
| StringBuffer buffer = new StringBuffer(methodSignature.length + 10); |
| |
| // return type |
| if (includeReturnType) { |
| char[] rts = getReturnType(methodSignature); |
| appendTypeSignature(rts, 0 , fullyQualifyTypeNames, buffer); |
| buffer.append(' '); |
| } |
| |
| // selector |
| if (methodName != null) { |
| buffer.append(methodName); |
| } |
| |
| // parameters |
| buffer.append('('); |
| char[][] pts = getParameterTypes(methodSignature); |
| for (int i = 0, max = pts.length; i < max; i++) { |
| if (i == max - 1) { |
| appendTypeSignature(pts[i], 0 , fullyQualifyTypeNames, buffer, isVargArgs); |
| } else { |
| appendTypeSignature(pts[i], 0 , fullyQualifyTypeNames, buffer); |
| } |
| if (parameterNames != null) { |
| buffer.append(' '); |
| buffer.append(parameterNames[i]); |
| } |
| if (i != pts.length - 1) { |
| buffer.append(','); |
| buffer.append(' '); |
| } |
| } |
| buffer.append(')'); |
| char[] result = new char[buffer.length()]; |
| buffer.getChars(0, buffer.length(), result, 0); |
| return result; |
| } |
| /** |
| * Converts the given type signature to a readable string. The signature is expected to |
| * be dot-based. |
| * |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * toString({'[', 'L', 'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'S', 't', 'r', 'i', 'n', 'g', ';'}) -> {'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'S', 't', 'r', 'i', 'n', 'g', '[', ']'} |
| * toString({'I'}) -> {'i', 'n', 't'} |
| * toString({'+', 'L', 'O', 'b', 'j', 'e', 'c', 't', ';'}) -> {'?', ' ', 'e', 'x', 't', 'e', 'n', 'd', 's', ' ', 'O', 'b', 'j', 'e', 'c', 't'} |
| * </code> |
| * </pre> |
| * </p> |
| * <p> |
| * Note: This method assumes that a type signature containing a <code>'$'</code> |
| * is an inner type signature. While this is correct in most cases, someone could |
| * define a non-inner type name containing a <code>'$'</code>. Handling this |
| * correctly in all cases would have required resolving the signature, which |
| * generally not feasible. |
| * </p> |
| * |
| * @param signature the type signature |
| * @return the string representation of the type |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| * |
| * |
| */ |
| public static char[] toCharArray(char[] signature) throws IllegalArgumentException { |
| int sigLength = signature.length; |
| if (sigLength == 0 || signature[0] == C_PARAM_START) { |
| return toCharArray(signature, CharOperation.NO_CHAR, null, true, true); |
| } |
| |
| StringBuffer buffer = new StringBuffer(signature.length + 10); |
| appendTypeSignature(signature, 0, true, buffer); |
| char[] result = new char[buffer.length()]; |
| buffer.getChars(0, buffer.length(), result, 0); |
| return result; |
| } |
| |
| /** |
| * Scans the given string for a type signature starting at the given |
| * index and appends it to the given buffer, and returns the index of the last |
| * character. |
| * |
| * @param string the signature string |
| * @param start the 0-based character index of the first character |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param buffer the string buffer to append to |
| * @return the 0-based character index of the last character |
| * @exception IllegalArgumentException if this is not a type signature |
| * @see Util#scanTypeSignature(char[], int) |
| */ |
| private static int appendTypeSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer) { |
| return appendTypeSignature(string, start, fullyQualifyTypeNames, buffer, false); |
| } |
| /** |
| * Scans the given string for a type signature starting at the given |
| * index and appends it to the given buffer, and returns the index of the last |
| * character. |
| * |
| * @param string the signature string |
| * @param start the 0-based character index of the first character |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param buffer the string buffer to append to |
| * @param isVarArgs <code>true</code> if the type must be displayed as a |
| * variable argument, <code>false</code> otherwise. In this case, the type must be an array type |
| * @return the 0-based character index of the last character |
| * @exception IllegalArgumentException if this is not a type signature, or if isVarArgs is <code>true</code>, |
| * and the type is not an array type signature. |
| * @see Util#scanTypeSignature(char[], int) |
| */ |
| private static int appendTypeSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer, boolean isVarArgs) { |
| // need a minimum 1 char |
| if (start >= string.length) { |
| throw new IllegalArgumentException(); |
| } |
| char c = string[start]; |
| if (isVarArgs) { |
| switch (c) { |
| case C_ARRAY : |
| return appendArrayTypeSignature(string, start, fullyQualifyTypeNames, buffer, true); |
| case C_RESOLVED : |
| case C_UNRESOLVED : |
| case C_VOID : |
| default: |
| throw new IllegalArgumentException(); // a var args is an array type |
| } |
| } else { |
| switch (c) { |
| case C_ARRAY : |
| return appendArrayTypeSignature(string, start, fullyQualifyTypeNames, buffer); |
| case C_RESOLVED : |
| case C_UNRESOLVED : |
| return appendClassTypeSignature(string, start, fullyQualifyTypeNames, buffer); |
| case C_COMPILATION_UNIT : |
| return appendCompilationUnitSignature(string, start, fullyQualifyTypeNames, buffer); |
| case C_ANY : |
| buffer.append(ANY); |
| return start; |
| case C_VOID : |
| buffer.append(VOID); |
| return start; |
| default : |
| int result = appendBaseTypeSignature(string, start, fullyQualifyTypeNames, buffer); |
| if (result == -1) { |
| /* either the string is not formated as a signature, or we do not know |
| * how to handle it, so just return it, this is preferable to throwing |
| * an unnecessary exception |
| */ |
| buffer.append(string); |
| } |
| return start; |
| } |
| } |
| } |
| |
| private static int appendBaseTypeSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer) { |
| // Need a minimum one char |
| if (start >= string.length) { // Do not throw unnecessary exception here |
| return -1; |
| } |
| // Base type should be exactly one character lenght |
| if (start + 1 < string.length && Character.isJavaIdentifierPart(string[start + 1])) { |
| return -1; |
| } |
| |
| // must start in any of 'B'(?), 'C', 'D', 'F', 'I', 'J', 'S', 'Z' |
| char c = string[start]; |
| String typeName = (String)BASE_TYPES.get(c); |
| if (typeName == null) |
| return -1; |
| buffer.append(typeName); |
| return start; |
| } |
| |
| |
| private static int appendCompilationUnitSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer) { |
| // need a minimum 3 chars "Lx;" |
| if (start >= string.length - 2) { |
| throw new IllegalArgumentException(); |
| } |
| // must start in "L" or "Q" |
| char c = string[start]; |
| if (c != C_COMPILATION_UNIT) { |
| throw new IllegalArgumentException(); |
| } |
| int p = start + 1; |
| while (true) { |
| if (p >= string.length) { |
| throw new IllegalArgumentException(); |
| } |
| c = string[p]; |
| switch(c) { |
| case C_SEMICOLON : |
| // all done |
| return p; |
| default : |
| buffer.append(c); |
| } |
| p++; |
| } |
| } |
| |
| |
| |
| /** |
| * Scans the given string for an array type signature starting at the given |
| * index and appends it to the given buffer, and returns the index of the last |
| * character. |
| * |
| * @param string the signature string |
| * @param start the 0-based character index of the first character |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @return the 0-based character index of the last character |
| * @exception IllegalArgumentException if this is not an array type signature |
| * @see Util#scanArrayTypeSignature(char[], int) |
| */ |
| private static int appendArrayTypeSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer) { |
| return appendArrayTypeSignature(string, start, fullyQualifyTypeNames, buffer, false); |
| } |
| |
| /** |
| * Scans the given string for an array type signature starting at the given |
| * index and appends it to the given buffer, and returns the index of the last |
| * character. |
| * |
| * @param string the signature string |
| * @param start the 0-based character index of the first character |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param isVarArgs <code>true</code> if the array type must be displayed as a |
| * variable argument, <code>false</code> otherwise |
| * @return the 0-based character index of the last character |
| * @exception IllegalArgumentException if this is not an array type signature |
| * @see Util#scanArrayTypeSignature(char[], int) |
| */ |
| private static int appendArrayTypeSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer, boolean isVarArgs) { |
| int length = string.length; |
| // need a minimum 2 char |
| if (start >= length - 1) { |
| throw new IllegalArgumentException(); |
| } |
| char c = string[start]; |
| if (c != C_ARRAY) { |
| throw new IllegalArgumentException(); |
| } |
| |
| int index = start; |
| c = string[++index]; |
| while(c == C_ARRAY) { |
| // need a minimum 2 char |
| if (index >= length - 1) { |
| throw new IllegalArgumentException(); |
| } |
| c = string[++index]; |
| } |
| |
| int e = appendTypeSignature(string, index, fullyQualifyTypeNames, buffer); |
| |
| for(int i = 1, dims = index - start; i < dims; i++) { |
| buffer.append('[').append(']'); |
| } |
| |
| if (isVarArgs) { |
| buffer.append('.').append('.').append('.'); |
| } else { |
| buffer.append('[').append(']'); |
| } |
| return e; |
| } |
| /** |
| * Scans the given string for a class type signature starting at the given |
| * index and appends it to the given buffer, and returns the index of the last |
| * character. |
| * |
| * @param string the signature string |
| * @param start the 0-based character index of the first character |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param buffer the string buffer to append to |
| * @return the 0-based character index of the last character |
| * @exception IllegalArgumentException if this is not a class type signature |
| * @see Util#scanClassTypeSignature(char[], int) |
| */ |
| private static int appendClassTypeSignature(char[] string, int start, boolean fullyQualifyTypeNames, StringBuffer buffer) { |
| // need a minimum 3 chars "Lx;" |
| if (start >= string.length - 2) { |
| throw new IllegalArgumentException(); |
| } |
| // must start in "L" or "Q" |
| char c = string[start]; |
| if (c != C_RESOLVED && c != C_UNRESOLVED) { |
| throw new IllegalArgumentException(); |
| } |
| boolean resolved = (c == C_RESOLVED); |
| boolean removePackageQualifiers = !fullyQualifyTypeNames; |
| if (!resolved) { |
| // keep everything in an unresolved name |
| removePackageQualifiers = false; |
| } |
| int p = start + 1; |
| int checkpoint = buffer.length(); |
| int innerTypeStart = -1; |
| boolean inAnonymousType = false; |
| while (true) { |
| if (p >= string.length) { |
| throw new IllegalArgumentException(); |
| } |
| c = string[p]; |
| switch(c) { |
| case C_SEMICOLON : |
| // all done |
| return p; |
| case C_DOT : |
| if (removePackageQualifiers) { |
| // erase package prefix |
| buffer.setLength(checkpoint); |
| } else { |
| buffer.append('.'); |
| } |
| break; |
| case '/' : |
| if (removePackageQualifiers) { |
| // erase package prefix |
| buffer.setLength(checkpoint); |
| } else { |
| buffer.append('/'); |
| } |
| break; |
| default : |
| if (innerTypeStart != -1 && !inAnonymousType && Character.isDigit(c)) { |
| inAnonymousType = true; |
| buffer.setLength(innerTypeStart); // remove '.' |
| buffer.insert(checkpoint, "new "); //$NON-NLS-1$ |
| buffer.append("(){}"); //$NON-NLS-1$ |
| } |
| if (!inAnonymousType) |
| buffer.append(c); |
| innerTypeStart = -1; |
| } |
| p++; |
| } |
| } |
| |
| /** |
| * Converts the given array of qualified name segments to a qualified name. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * toQualifiedName({{'j', 'a', 'v', 'a'}, {'l', 'a', 'n', 'g'}, {'O', 'b', 'j', 'e', 'c', 't'}}) -> {'j', 'a', 'v', 'a', '.', 'l', 'a', 'n', 'g', '.', 'O', 'b', 'j', 'e', 'c', 't'} |
| * toQualifiedName({{'O', 'b', 'j', 'e', 'c', 't'}}) -> {'O', 'b', 'j', 'e', 'c', 't'} |
| * toQualifiedName({{}}) -> {} |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param segments the list of name segments, possibly empty |
| * @return the dot-separated qualified name, or the empty string |
| * |
| * |
| */ |
| public static char[] toQualifiedName(char[][] segments) { |
| int length = segments.length; |
| if (length == 0) return CharOperation.NO_CHAR; |
| if (length == 1) return segments[0]; |
| |
| int resultLength = 0; |
| for (int i = 0; i < length; i++) { |
| resultLength += segments[i].length+1; |
| } |
| resultLength--; |
| char[] result = new char[resultLength]; |
| int index = 0; |
| for (int i = 0; i < length; i++) { |
| char[] segment = segments[i]; |
| int segmentLength = segment.length; |
| System.arraycopy(segment, 0, result, index, segmentLength); |
| index += segmentLength; |
| if (i != length-1) { |
| result[index++] = C_DOT; |
| } |
| } |
| return result; |
| } |
| /** |
| * Converts the given array of qualified name segments to a qualified name. |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * toQualifiedName(new String[] {"java", "lang", "Object"}) -> "java.lang.Object" |
| * toQualifiedName(new String[] {"Object"}) -> "Object" |
| * toQualifiedName(new String[0]) -> "" |
| * </code> |
| * </pre> |
| * </p> |
| * |
| * @param segments the list of name segments, possibly empty |
| * @return the dot-separated qualified name, or the empty string |
| */ |
| public static String toQualifiedName(String[] segments) { |
| int length = segments.length; |
| char[][] charArrays = new char[length][]; |
| for (int i = 0; i < length; i++) { |
| charArrays[i] = segments[i].toCharArray(); |
| } |
| return new String(toQualifiedName(charArrays)); |
| } |
| /** |
| * Converts the given type signature to a readable string. The signature is expected to |
| * be dot-based. |
| * |
| * <p> |
| * For example: |
| * <pre> |
| * <code> |
| * toString("[Ljava.lang.String;") -> "java.lang.String[]" |
| * toString("I") -> "int" |
| * toString("+QObject;") -> "? extends Object" |
| * </code> |
| * </pre> |
| * </p> |
| * <p> |
| * Note: This method assumes that a type signature containing a <code>'$'</code> |
| * is an inner type signature. While this is correct in most cases, someone could |
| * define a non-inner type name containing a <code>'$'</code>. Handling this |
| * correctly in all cases would have required resolving the signature, which |
| * generally not feasible. |
| * </p> |
| * |
| * @param signature the type signature |
| * @return the string representation of the type |
| * @exception IllegalArgumentException if the signature is not syntactically |
| * correct |
| */ |
| public static String toString(String signature) throws IllegalArgumentException { |
| return new String(toCharArray(signature.toCharArray())); |
| } |
| /** |
| * Converts the given method signature to a readable string. The method signature is expected to |
| * be dot-based. |
| * |
| * @param methodSignature the method signature to convert |
| * @param methodName the name of the method to insert in the result, or |
| * <code>null</code> if no method name is to be included |
| * @param parameterNames the parameter names to insert in the result, or |
| * <code>null</code> if no parameter names are to be included; if supplied, |
| * the number of parameter names must match that of the method signature |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param includeReturnType <code>true</code> if the return type is to be |
| * included |
| * @see #toCharArray(char[], char[], char[][], boolean, boolean) |
| * @return the string representation of the method signature |
| */ |
| public static String toString(String methodSignature, String methodName, String[] parameterNames, boolean fullyQualifyTypeNames, boolean includeReturnType) { |
| return toString(methodSignature, methodName, parameterNames, fullyQualifyTypeNames, includeReturnType, false); |
| } |
| /** |
| * Converts the given method signature to a readable string. The method signature is expected to |
| * be dot-based. |
| * |
| * @param methodSignature the method signature to convert |
| * @param methodName the name of the method to insert in the result, or |
| * <code>null</code> if no method name is to be included |
| * @param parameterNames the parameter names to insert in the result, or |
| * <code>null</code> if no parameter names are to be included; if supplied, |
| * the number of parameter names must match that of the method signature |
| * @param fullyQualifyTypeNames <code>true</code> if type names should be fully |
| * qualified, and <code>false</code> to use only simple names |
| * @param includeReturnType <code>true</code> if the return type is to be |
| * included |
| * @param isVarArgs <code>true</code> if the last argument should be displayed as a |
| * variable argument, <code>false</code> otherwise |
| * @see #toCharArray(char[], char[], char[][], boolean, boolean) |
| * @return the string representation of the method signature |
| * |
| * |
| */ |
| public static String toString(String methodSignature, String methodName, String[] parameterNames, boolean fullyQualifyTypeNames, boolean includeReturnType, boolean isVarArgs) { |
| char[][] params; |
| if (parameterNames == null) { |
| params = null; |
| } else { |
| int paramLength = parameterNames.length; |
| params = new char[paramLength][]; |
| for (int i = 0; i < paramLength; i++) { |
| params[i] = parameterNames[i].toCharArray(); |
| } |
| } |
| return new String(toCharArray(methodSignature.toCharArray(), methodName == null ? null : methodName.toCharArray(), params, fullyQualifyTypeNames, includeReturnType, isVarArgs)); |
| } |
| } |