repo/org.ibex.tool/src/org/eclipse/jdt/internal/compiler/ast/StringLiteralConcatenation.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2004 IBM Corporation and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v1.0
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v10.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  *******************************************************************************/
  11 package org.eclipse.jdt.internal.compiler.ast;
  12
  13 import org.eclipse.jdt.internal.compiler.ASTVisitor;
  14 import org.eclipse.jdt.internal.compiler.lookup.BlockScope;
  15
  16 /**
  17  * Flatten string literal
  18  */
  19 public class StringLiteralConcatenation extends StringLiteral {
  20         private static final int INITIAL_SIZE = 5;
  21         public StringLiteral[] literals;
  22         public int counter;
  23         /**
  24          * Build a two-strings literal
  25          * */
  26         public StringLiteralConcatenation(StringLiteral str1, StringLiteral str2) {
  27                 super(str1.sourceStart, str1.sourceEnd);
  28                 this.source = str1.source;
  29                 this.literals = new StringLiteral[INITIAL_SIZE];
  30                 this.counter = 0;
  31                 this.literals[this.counter++] = str1;
  32                 extendsWith(str2);
  33         }
  34
  35         /**
  36          *  Add the lit source to mine, just as if it was mine
  37          */
  38         public StringLiteralConcatenation extendsWith(StringLiteral lit) {
  39                 this.sourceEnd = lit.sourceEnd;
  40                 final int literalsLength = this.literals.length;
  41                 if (this.counter == literalsLength) {
  42                         // resize
  43                         System.arraycopy(this.literals, 0, this.literals = new StringLiteral[literalsLength + INITIAL_SIZE], 0, literalsLength);
  44                 }
  45                 //uddate the source
  46                 int length = source.length;
  47                 System.arraycopy(
  48                         source,
  49                         0,
  50                         source = new char[length + lit.source.length],
  51                         0,
  52                         length);
  53                 System.arraycopy(lit.source, 0, source, length, lit.source.length);
  54                 this.literals[this.counter++] = lit;
  55                 return this;
  56         }
  57
  58         public StringBuffer printExpression(int indent, StringBuffer output) {
  59                 output.append("StringLiteralConcatenation{"); //$NON-NLS-1$
  60                 for (int i = 0, max = this.counter; i < max; i++) {
  61                         this.literals[i].printExpression(indent, output);
  62                         output.append("+\n");//$NON-NLS-1$
  63                 }
  64                 return output.append('}');
  65         }
  66
  67         public char[] source() {
  68                 return source;
  69         }
  70
  71         public void traverse(ASTVisitor visitor, BlockScope scope) {
  72                 if (visitor.visit(this, scope)) {
  73                         for (int i = 0, max = this.counter; i < max; i++) {
  74                                 this.literals[i].traverse(visitor, scope);
  75                         }
  76                 }
  77                 visitor.endVisit(this, scope);
  78         }
  79 }