net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/ast/Initializer.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
   3  * All rights reserved. This program and the accompanying materials
   4  * are made available under the terms of the Common Public License v0.5
   5  * which accompanies this distribution, and is available at
   6  * http://www.eclipse.org/legal/cpl-v05.html
   7  *
   8  * Contributors:
   9  *     IBM Corporation - initial API and implementation
  10  ******************************************************************************/
  11 package net.sourceforge.phpdt.internal.compiler.ast;
  12
  13 import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
  14 import net.sourceforge.phpdt.internal.compiler.codegen.CodeStream;
  15 import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
  16 import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
  17 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  18 import net.sourceforge.phpdt.internal.compiler.lookup.MethodScope;
  19 import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
  20 import net.sourceforge.phpdt.internal.compiler.parser.Parser;
  21
  22 public class Initializer extends FieldDeclaration {
  23
  24         public Block block;
  25         public int lastFieldID;
  26         public int bodyStart;
  27         public Initializer(Block block, int modifiers) {
  28                 this.block = block;
  29                 this.modifiers = modifiers;
  30
  31                 declarationSourceStart = sourceStart = block.sourceStart;
  32         }
  33
  34         public FlowInfo analyseCode(
  35                 MethodScope currentScope,
  36                 FlowContext flowContext,
  37                 FlowInfo flowInfo) {
  38
  39                 return block.analyseCode(currentScope, flowContext, flowInfo);
  40         }
  41
  42         /**
  43          * Code generation for a non-static initializer.
  44          *      i.e.&nbsp;normal block code gen
  45          *
  46          * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
  47          * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
  48          */
  49         public void generateCode(BlockScope currentScope, CodeStream codeStream) {
  50
  51                 if ((bits & IsReachableMASK) == 0) {
  52                         return;
  53                 }
  54                 int pc = codeStream.position;
  55                 block.generateCode(currentScope, codeStream);
  56                 codeStream.recordPositionsFrom(pc, this.sourceStart);
  57         }
  58
  59         public boolean isField() {
  60
  61                 return false;
  62         }
  63
  64         public boolean isStatic() {
  65
  66                 return (modifiers & AccStatic) != 0;
  67         }
  68
  69         public void parseStatements(
  70                 Parser parser,
  71                 TypeDeclaration type,
  72                 CompilationUnitDeclaration unit) {
  73
  74                 //fill up the method body with statement
  75                 parser.parse(this, type, unit);
  76         }
  77
  78         public void resolve(MethodScope scope) {
  79
  80                 int previous = scope.fieldDeclarationIndex;
  81                 try {
  82                         scope.fieldDeclarationIndex = lastFieldID;
  83                         if (isStatic()) {
  84                                 ReferenceBinding declaringType = scope.enclosingSourceType();
  85                                 if (declaringType.isNestedType() && !declaringType.isStatic())
  86                                         scope.problemReporter().innerTypesCannotDeclareStaticInitializers(
  87                                                 declaringType,
  88                                                 this);
  89                         }
  90                         block.resolve(scope);
  91                 } finally {
  92                         scope.fieldDeclarationIndex = previous;
  93                 }
  94         }
  95
  96         public String toString(int tab) {
  97
  98                 if (modifiers != 0) {
  99                         StringBuffer buffer = new StringBuffer();
 100                         buffer.append(tabString(tab));
 101                         buffer.append(modifiersString(modifiers));
 102                         buffer.append("{\n"); //$NON-NLS-1$
 103                         buffer.append(block.toStringStatements(tab));
 104                         buffer.append(tabString(tab));
 105                         buffer.append("}"); //$NON-NLS-1$
 106                         return buffer.toString();
 107                 } else {
 108                         return block.toString(tab);
 109                 }
 110         }
 111
 112         public void traverse(IAbstractSyntaxTreeVisitor visitor, MethodScope scope) {
 113
 114                 if (visitor.visit(this, scope)) {
 115                         block.traverse(visitor, scope);
 116                 }
 117                 visitor.visit(this, scope);
 118         }
 119 }