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.*;
  15 import net.sourceforge.phpdt.internal.compiler.flow.*;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.*;
  17 import net.sourceforge.phpdt.internal.compiler.parser.*;
  18
  19 public class Initializer extends FieldDeclaration {
  20
  21         public Block block;
  22         public int lastFieldID;
  23         public int bodyStart;
  24         public Initializer(Block block, int modifiers) {
  25                 this.block = block;
  26                 this.modifiers = modifiers;
  27
  28                 declarationSourceStart = sourceStart = block.sourceStart;
  29         }
  30
  31         public FlowInfo analyseCode(
  32                 MethodScope currentScope,
  33                 FlowContext flowContext,
  34                 FlowInfo flowInfo) {
  35
  36                 return block.analyseCode(currentScope, flowContext, flowInfo);
  37         }
  38
  39         /**
  40          * Code generation for a non-static initializer.
  41          *      i.e.&nbsp;normal block code gen
  42          *
  43          * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
  44          * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
  45          */
  46         public void generateCode(BlockScope currentScope, CodeStream codeStream) {
  47
  48                 if ((bits & IsReachableMASK) == 0) {
  49                         return;
  50                 }
  51                 int pc = codeStream.position;
  52                 block.generateCode(currentScope, codeStream);
  53                 codeStream.recordPositionsFrom(pc, this.sourceStart);
  54         }
  55
  56         public boolean isField() {
  57
  58                 return false;
  59         }
  60
  61         public boolean isStatic() {
  62
  63                 return (modifiers & AccStatic) != 0;
  64         }
  65
  66         public void parseStatements(
  67                 Parser parser,
  68                 TypeDeclaration type,
  69                 CompilationUnitDeclaration unit) {
  70
  71                 //fill up the method body with statement
  72                 parser.parse(this, type, unit);
  73         }
  74
  75         public void resolve(MethodScope scope) {
  76
  77                 int previous = scope.fieldDeclarationIndex;
  78                 try {
  79                         scope.fieldDeclarationIndex = lastFieldID;
  80                         if (isStatic()) {
  81                                 ReferenceBinding declaringType = scope.enclosingSourceType();
  82                                 if (declaringType.isNestedType() && !declaringType.isStatic())
  83                                         scope.problemReporter().innerTypesCannotDeclareStaticInitializers(
  84                                                 declaringType,
  85                                                 this);
  86                         }
  87                         block.resolve(scope);
  88                 } finally {
  89                         scope.fieldDeclarationIndex = previous;
  90                 }
  91         }
  92
  93         public String toString(int tab) {
  94
  95                 if (modifiers != 0) {
  96                         StringBuffer buffer = new StringBuffer();
  97                         buffer.append(tabString(tab));
  98                         buffer.append(modifiersString(modifiers));
  99                         buffer.append("{\n"); //$NON-NLS-1$
 100                         buffer.append(block.toStringStatements(tab));
 101                         buffer.append(tabString(tab));
 102                         buffer.append("}"); //$NON-NLS-1$
 103                         return buffer.toString();
 104                 } else {
 105                         return block.toString(tab);
 106                 }
 107         }
 108
 109         public void traverse(IAbstractSyntaxTreeVisitor visitor, MethodScope scope) {
 110
 111                 if (visitor.visit(this, scope)) {
 112                         block.traverse(visitor, scope);
 113                 }
 114                 visitor.visit(this, scope);
 115         }
 116 }