/*******************************************************************************
* Copyright (c) 2000, 2008 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.wst.jsdt.core.dom;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.wst.jsdt.core.compiler.InvalidInputException;
import org.eclipse.wst.jsdt.internal.compiler.parser.Scanner;
import org.eclipse.wst.jsdt.internal.compiler.parser.TerminalTokens;
/**
* Number literal nodes.
*
* 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 class NumberLiteral extends Expression {
/**
* The "token" structural property of this node type.
*
*/
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
* AST.JLS*
constants
* @return a list of property descriptors (element type:
* {@link StructuralPropertyDescriptor})
*
*/
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 "0
".
*
* N.B. This constructor is package-private. *
* * @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(this.getStartPosition(), this.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(tokenValue); return size; } /* (omit javadoc for this method) * Method declared on ASTNode. */ int treeSize() { return memSize(); } }