| /******************************************************************************* |
| * Copyright (c) 2000, 2010 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.core.dom; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import org.eclipse.jdt.core.compiler.InvalidInputException; |
| import org.eclipse.jdt.internal.compiler.parser.Scanner; |
| import org.eclipse.jdt.internal.compiler.parser.TerminalTokens; |
| |
| /** |
| * Number literal nodes. |
| * |
| * @since 2.0 |
| * @noinstantiate This class is not intended to be instantiated by clients. |
| */ |
| public class NumberLiteral extends Expression { |
| |
| /** |
| * The "token" structural property of this node type (type: {@link String}). |
| * @since 3.0 |
| */ |
| public static final SimplePropertyDescriptor TOKEN_PROPERTY = |
| new SimplePropertyDescriptor(NumberLiteral.class, "token", String.class, MANDATORY); //$NON-NLS-1$ |
| |
| /** |
| * A list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}), |
| * or null if uninitialized. |
| */ |
| private static final List PROPERTY_DESCRIPTORS; |
| |
| static { |
| List propertyList = new ArrayList(2); |
| createPropertyList(NumberLiteral.class, propertyList); |
| addProperty(TOKEN_PROPERTY, propertyList); |
| PROPERTY_DESCRIPTORS = reapPropertyList(propertyList); |
| } |
| |
| /** |
| * Returns a list of structural property descriptors for this node type. |
| * Clients must not modify the result. |
| * |
| * @param apiLevel the API level; one of the |
| * <code>AST.JLS*</code> constants |
| |
| * @return a list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}) |
| * @since 3.0 |
| */ |
| public static List propertyDescriptors(int apiLevel) { |
| return PROPERTY_DESCRIPTORS; |
| } |
| |
| /** |
| * The token string; defaults to the integer literal "0". |
| */ |
| private String tokenValue = "0";//$NON-NLS-1$ |
| |
| /** |
| * Creates a new unparented number literal node owned by the given AST. |
| * By default, the number literal is the token "<code>0</code>". |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| */ |
| NumberLiteral(AST ast) { |
| super(ast); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final List internalStructuralPropertiesForType(int apiLevel) { |
| return propertyDescriptors(apiLevel); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final Object internalGetSetObjectProperty(SimplePropertyDescriptor property, boolean get, Object value) { |
| if (property == TOKEN_PROPERTY) { |
| if (get) { |
| return getToken(); |
| } else { |
| setToken((String) value); |
| return null; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetObjectProperty(property, get, value); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final int getNodeType0() { |
| return NUMBER_LITERAL; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| ASTNode clone0(AST target) { |
| NumberLiteral result = new NumberLiteral(target); |
| result.setSourceRange(getStartPosition(), getLength()); |
| result.setToken(getToken()); |
| return result; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| final boolean subtreeMatch0(ASTMatcher matcher, Object other) { |
| // dispatch to correct overloaded match method |
| return matcher.match(this, other); |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| void accept0(ASTVisitor visitor) { |
| visitor.visit(this); |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the token of this number literal node. The value is the sequence |
| * of characters that would appear in the source program. |
| * |
| * @return the numeric literal token |
| */ |
| public String getToken() { |
| return this.tokenValue; |
| } |
| |
| /** |
| * Sets the token of this number literal node. The value is the sequence |
| * of characters that would appear in the source program. |
| * |
| * @param token the numeric literal token |
| * @exception IllegalArgumentException if the argument is incorrect |
| */ |
| public void setToken(String token) { |
| // update internalSetToken(String) if this is changed |
| if (token == null || token.length() == 0) { |
| throw new IllegalArgumentException(); |
| } |
| Scanner scanner = this.ast.scanner; |
| char[] source = token.toCharArray(); |
| scanner.setSource(source); |
| scanner.resetTo(0, source.length); |
| scanner.tokenizeComments = false; |
| scanner.tokenizeWhiteSpace = false; |
| try { |
| int tokenType = scanner.getNextToken(); |
| switch(tokenType) { |
| case TerminalTokens.TokenNameDoubleLiteral: |
| case TerminalTokens.TokenNameIntegerLiteral: |
| case TerminalTokens.TokenNameFloatingPointLiteral: |
| case TerminalTokens.TokenNameLongLiteral: |
| break; |
| case TerminalTokens.TokenNameMINUS : |
| tokenType = scanner.getNextToken(); |
| switch(tokenType) { |
| case TerminalTokens.TokenNameDoubleLiteral: |
| case TerminalTokens.TokenNameIntegerLiteral: |
| case TerminalTokens.TokenNameFloatingPointLiteral: |
| case TerminalTokens.TokenNameLongLiteral: |
| break; |
| default: |
| throw new IllegalArgumentException("Invalid number literal : >" + token + "<"); //$NON-NLS-1$//$NON-NLS-2$ |
| } |
| break; |
| default: |
| throw new IllegalArgumentException("Invalid number literal : >" + token + "<");//$NON-NLS-1$//$NON-NLS-2$ |
| } |
| } catch(InvalidInputException e) { |
| throw new IllegalArgumentException(); |
| } finally { |
| scanner.tokenizeComments = true; |
| scanner.tokenizeWhiteSpace = true; |
| } |
| preValueChange(TOKEN_PROPERTY); |
| this.tokenValue = token; |
| postValueChange(TOKEN_PROPERTY); |
| } |
| |
| /* (omit javadoc for this method) |
| * This method is a copy of setToken(String) that doesn't do any validation. |
| */ |
| void internalSetToken(String token) { |
| preValueChange(TOKEN_PROPERTY); |
| this.tokenValue = token; |
| postValueChange(TOKEN_PROPERTY); |
| } |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int memSize() { |
| int size = BASE_NODE_SIZE + 1 * 4 + stringSize(this.tokenValue); |
| return size; |
| } |
| |
| /* (omit javadoc for this method) |
| * Method declared on ASTNode. |
| */ |
| int treeSize() { |
| return memSize(); |
| } |
| } |