| /******************************************************************************* |
| * Copyright (c) 2004 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Common Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/cpl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdi.internal; |
| |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| |
| |
| |
| /** |
| */ |
| public class GenericSignature { |
| |
| private static final char C_BOOLEAN= 'Z'; |
| private static final char C_BYTE= 'B'; |
| private static final char C_CHAR= 'C'; |
| private static final char C_SHORT= 'S'; |
| private static final char C_DOUBLE= 'D'; |
| private static final char C_FLOAT= 'F'; |
| private static final char C_INT= 'I'; |
| private static final char C_LONG= 'J'; |
| private static final char C_CLASS_TYPE= 'L'; |
| private static final char C_TYPE_VARIABLE= 'T'; |
| private static final char C_ARRAY= '['; |
| private static final char C_VOID= 'V'; |
| private static final char C_WILDCARD_PLUS= '+'; |
| private static final char C_WILDCARD_MINUS= '-'; |
| |
| private static final char C_TYPE_END= ';'; |
| private static final char C_PARAMETERS_START= '('; |
| private static final char C_PARAMETERS_END= ')'; |
| private static final char C_EXCEPTION_START= '^'; |
| private static final char C_TYPE_ARGUMENTS_START= '<'; |
| private static final char C_TYPE_ARGUMENTS_END= '>'; |
| private static final char C_TYPE_PARAMETERS_START= '<'; |
| private static final char C_TYPE_PARAMETERS_END= '>'; |
| private static final char C_TYPE_PARAMETERS_COLON= ':'; |
| |
| public static String getReturnType(String methodSignature) { |
| int parametersEnd= methodSignature.lastIndexOf(C_PARAMETERS_END); |
| if (parametersEnd == -1) { |
| throw new IllegalArgumentException(); |
| } |
| int exceptionStart= methodSignature.indexOf(C_EXCEPTION_START, parametersEnd + 1); |
| if (exceptionStart == -1) { |
| return methodSignature.substring(parametersEnd + 1); |
| } |
| return methodSignature.substring(parametersEnd + 1, exceptionStart); |
| } |
| |
| public static List getArgumentsSignature(String methodSignature) { |
| int parameterStart= methodSignature.indexOf(C_PARAMETERS_START); |
| int parametersEnd= methodSignature.lastIndexOf(C_PARAMETERS_END); |
| if (parameterStart == -1 || parametersEnd == -1) { |
| throw new IllegalArgumentException(); |
| } |
| return getTypeSignatureList(methodSignature.substring(parameterStart + 1, parametersEnd)); |
| } |
| |
| public static List getTypeParameters(String genericClassSignature) { |
| List parameters= new ArrayList(); |
| if (genericClassSignature.charAt(0) == C_TYPE_PARAMETERS_START) { |
| int pos= 1; |
| while (genericClassSignature.charAt(pos) != C_TYPE_PARAMETERS_END) { |
| int identEnd= genericClassSignature.indexOf(C_TYPE_PARAMETERS_COLON, pos); |
| parameters.add(genericClassSignature.substring(pos, identEnd)); |
| pos= identEnd + 1; |
| // jump class bound, can be empty |
| if (genericClassSignature.charAt(pos) != C_TYPE_PARAMETERS_COLON) { |
| pos+= nextTypeSignatureLength(genericClassSignature, pos); |
| } |
| // jump interface bounds |
| while (genericClassSignature.charAt(pos) == C_TYPE_PARAMETERS_COLON) { |
| pos+= nextTypeSignatureLength(genericClassSignature, ++pos); |
| } |
| } |
| } |
| |
| return parameters; |
| } |
| |
| public static String signatureToName(String typeSignature) { |
| String name= null; |
| char char0= typeSignature.charAt(0); |
| int length= typeSignature.length(); |
| switch (char0) { |
| case C_BOOLEAN: |
| checkLength(typeSignature, 1); |
| name= "boolean"; //$NON-NLS-1$ |
| break; |
| case C_BYTE: |
| checkLength(typeSignature, 1); |
| name= "byte"; //$NON-NLS-1$ |
| break; |
| case C_CHAR: |
| checkLength(typeSignature, 1); |
| name= "char"; //$NON-NLS-1$ |
| break; |
| case C_SHORT: |
| checkLength(typeSignature, 1); |
| name= "short"; //$NON-NLS-1$ |
| break; |
| case C_DOUBLE: |
| checkLength(typeSignature, 1); |
| name= "double"; //$NON-NLS-1$ |
| break; |
| case C_FLOAT: |
| checkLength(typeSignature, 1); |
| name= "float"; //$NON-NLS-1$ |
| break; |
| case C_INT: |
| checkLength(typeSignature, 1); |
| name= "int"; //$NON-NLS-1$ |
| break; |
| case C_LONG: |
| checkLength(typeSignature, 1); |
| name= "long"; //$NON-NLS-1$ |
| break; |
| case C_VOID: |
| checkLength(typeSignature, 1); |
| name= "void"; //$NON-NLS-1$ |
| break; |
| case C_ARRAY: |
| name= signatureToName(typeSignature.substring(1)) + "[]"; //$NON-NLS-1$ |
| break; |
| case C_WILDCARD_PLUS: |
| name= "? extends " + signatureToName(typeSignature.substring(1)); //$NON-NLS-1$ |
| break; |
| case C_WILDCARD_MINUS: |
| name= "? super " + signatureToName(typeSignature.substring(1)); //$NON-NLS-1$ |
| break; |
| case C_CLASS_TYPE: |
| checkChar(typeSignature, length - 1, C_TYPE_END); |
| int argumentStart= typeSignature.indexOf(C_TYPE_ARGUMENTS_START, 1); |
| if (argumentStart != -1) { |
| checkChar(typeSignature, length - 2, C_TYPE_ARGUMENTS_END); |
| name= typeSignature.substring(1, argumentStart).replace('/', '.') + C_TYPE_ARGUMENTS_START + nameListToString(listSignaturetoListName(getTypeSignatureList(typeSignature.substring(argumentStart + 1, length - 2)))) + C_TYPE_ARGUMENTS_END; |
| } else { |
| name= typeSignature.substring(1, length - 1).replace('/', '.'); |
| } |
| break; |
| case C_TYPE_VARIABLE: |
| checkChar(typeSignature, length - 1, C_TYPE_END); |
| name= typeSignature.substring(1, length - 1); |
| break; |
| default: |
| throw new IllegalArgumentException(); |
| } |
| |
| return name; |
| } |
| |
| public static String nameListToString(List names) { |
| StringBuffer string= new StringBuffer(); |
| Iterator iterator= names.iterator(); |
| if (iterator.hasNext()) { |
| string.append(iterator.next()); |
| while (iterator.hasNext()) { |
| string.append(',').append(iterator.next()); |
| } |
| } |
| return string.toString(); |
| } |
| |
| public static List listSignaturetoListName(List signatures) { |
| List names= new ArrayList(signatures.size()); |
| for (Iterator iterator= signatures.iterator(); iterator.hasNext();) { |
| names.add(signatureToName((String)iterator.next())); |
| } |
| return names; |
| } |
| |
| private static List getTypeSignatureList(String typeSignatureList) { |
| List list= new ArrayList(); |
| int pos= 0; |
| while (pos < typeSignatureList.length()) { |
| int signatureLength= nextTypeSignatureLength(typeSignatureList, pos); |
| list.add(typeSignatureList.substring(pos, pos+= signatureLength)); |
| } |
| return list; |
| } |
| |
| private static int nextTypeSignatureLength(String signature, int startPos) { |
| int inclusionLevel= 0; |
| for (int i= startPos, length= signature.length(); i < length; i++) { |
| if (inclusionLevel == 0) { |
| switch (signature.charAt(i)) { |
| case C_CLASS_TYPE: |
| case C_TYPE_VARIABLE: |
| case C_WILDCARD_PLUS: |
| case C_WILDCARD_MINUS: |
| inclusionLevel= 1; |
| break; |
| case C_ARRAY: |
| break; |
| default: |
| return i - startPos + 1; |
| } |
| } else { |
| switch (signature.charAt(i)) { |
| case C_TYPE_END: |
| if (inclusionLevel == 1) { |
| return i - startPos + 1; |
| } |
| break; |
| case C_TYPE_ARGUMENTS_START: |
| inclusionLevel++; |
| break; |
| case C_TYPE_ARGUMENTS_END: |
| inclusionLevel--; |
| break; |
| } |
| } |
| } |
| throw new IllegalArgumentException(); |
| } |
| |
| private static void checkChar(String string, int index, char character) { |
| if (string.charAt(index) != character) { |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| private static void checkLength(String string, int length) { |
| if (string.length() != length) { |
| throw new IllegalArgumentException(); |
| } |
| } |
| |
| /** |
| * @returns Returns true if signature is a class signature. |
| */ |
| public static boolean isClassSignature(String signature) { |
| return signature.charAt(0) == C_CLASS_TYPE; |
| } |
| |
| /** |
| * @returns Returns true if signature is an array signature. |
| */ |
| public static boolean isArraySignature(String signature) { |
| return signature.charAt(0) == C_ARRAY; |
| } |
| |
| /** |
| * @returns Returns true if signature is an primitive signature. |
| */ |
| public static boolean isPrimitiveSignature(String signature) { |
| switch (signature.charAt(0)) { |
| case C_BOOLEAN: |
| case C_BYTE: |
| case C_CHAR: |
| case C_SHORT: |
| case C_INT: |
| case C_LONG: |
| case C_FLOAT: |
| case C_DOUBLE: |
| return true; |
| default: |
| return false; |
| } |
| } |
| |
| /** |
| * @returns Returns true if signature is void signature. |
| */ |
| public static boolean isVoidSignature(String signature) { |
| return signature.charAt(0) == C_VOID; |
| } |
| |
| } |