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Java > Open Source Codes > org > eclipse > jdt > internal > core > search > indexing > IndexingParser


1 /*******************************************************************************
2  * Copyright (c) 2000, 2007 IBM Corporation and others.
3  * All rights reserved. This program and the accompanying materials
4  * are made available under the terms of the Eclipse Public License v1.0
5  * which accompanies this distribution, and is available at
6  * http://www.eclipse.org/legal/epl-v10.html
7  *
8  * Contributors:
9  * IBM Corporation - initial API and implementation
10  *******************************************************************************/
11 package org.eclipse.jdt.internal.core.search.indexing;
12
13 import org.eclipse.jdt.core.compiler.CharOperation;
14 import org.eclipse.jdt.internal.compiler.IProblemFactory;
15 import org.eclipse.jdt.internal.compiler.ISourceElementRequestor;
16 import org.eclipse.jdt.internal.compiler.SourceElementParser;
17 import org.eclipse.jdt.internal.compiler.ast.ASTNode;
18 import org.eclipse.jdt.internal.compiler.ast.ImportReference;
19 import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
20 import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
21 import org.eclipse.jdt.internal.compiler.impl.CompilerOptions;
22
23 /*
24  * A source element parser that avoids creating unnecessary nodes.
25  */
26 public class IndexingParser extends SourceElementParser {
27     SingleNameReference singleNameReference = new SingleNameReference(CharOperation.NO_CHAR, 0);
28     QualifiedNameReference qualifiedNameReference = new QualifiedNameReference(CharOperation.NO_CHAR_CHAR, new long[0], 0, 0);
29     ImportReference importReference = new ImportReference(CharOperation.NO_CHAR_CHAR, new long[1], false, 0);
30
31     public IndexingParser(ISourceElementRequestor requestor, IProblemFactory problemFactory, CompilerOptions options, boolean reportLocalDeclarations, boolean optimizeStringLiterals, boolean useSourceJavadocParser) {
32         super(requestor, problemFactory, options, reportLocalDeclarations,
33                 optimizeStringLiterals, useSourceJavadocParser);
34     }
35     
36     protected ImportReference newImportReference(char[][] tokens, long[] sourcePositions, boolean onDemand, int mod) {
37         ImportReference ref = this.importReference;
38         ref.tokens = tokens;
39         ref.sourcePositions = sourcePositions;
40         if (onDemand) {
41             ref.bits |= ASTNode.OnDemand;
42         }
43         ref.sourceEnd = (int) (sourcePositions[sourcePositions.length-1] & 0x00000000FFFFFFFF);
44         ref.sourceStart = (int) (sourcePositions[0] >>> 32);
45         ref.modifiers = modifiers;
46         return ref;
47     }
48
49     protected SingleNameReference newSingleNameReference(char[] source, long positions) {
50         SingleNameReference ref = this.singleNameReference;
51         ref.token = source;
52         ref.sourceStart = (int) (positions >>> 32);
53         ref.sourceEnd = (int) positions;
54         return ref;
55     }
56     
57     protected QualifiedNameReference newQualifiedNameReference(char[][] tokens, long[] positions, int sourceStart, int sourceEnd) {
58         QualifiedNameReference ref = this.qualifiedNameReference;
59         ref.tokens = tokens;
60         ref.sourcePositions = positions;
61         ref.sourceStart = sourceStart;
62         ref.sourceEnd = sourceEnd;
63         return ref;
64     }
65 }
66
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