net.sourceforge.phpeclipse/src/net/sourceforge/phpdt/internal/compiler/flow/InitializationFlowContext.java

   1 /*******************************************************************************
   2  * Copyright (c) 2000, 2003 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 net.sourceforge.phpdt.internal.compiler.flow;
  12
  13 import net.sourceforge.phpdt.internal.compiler.ast.ASTNode;
  14 import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
  15 import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
  16 import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
  17
  18 /**
  19  * Reflects the context of code analysis, keeping track of enclosing
  20  *      try statements, exception handlers, etc...
  21  */
  22 public class InitializationFlowContext extends ExceptionHandlingFlowContext {
  23
  24         public int exceptionCount;
  25         public TypeBinding[] thrownExceptions = new TypeBinding[5];
  26         public ASTNode[] exceptionThrowers = new ASTNode[5];
  27         public FlowInfo[] exceptionThrowerFlowInfos = new FlowInfo[5];
  28
  29         public InitializationFlowContext(
  30                 FlowContext parent,
  31                 ASTNode associatedNode,
  32                 BlockScope scope) {
  33                 super(
  34                         parent,
  35                         associatedNode,
  36                         NoExceptions, // no exception allowed by default
  37                         scope,
  38                         FlowInfo.DEAD_END);
  39         }
  40
  41         public void checkInitializerExceptions(
  42                 BlockScope currentScope,
  43                 FlowContext initializerContext,
  44                 FlowInfo flowInfo) {
  45                 for (int i = 0; i < exceptionCount; i++) {
  46                         initializerContext.checkExceptionHandlers(
  47                                 thrownExceptions[i],
  48                                 exceptionThrowers[i],
  49                                 exceptionThrowerFlowInfos[i],
  50                                 currentScope);
  51                 }
  52         }
  53
  54         public String individualToString() {
  55
  56                 StringBuffer buffer = new StringBuffer("Initialization flow context"); //$NON-NLS-1$
  57                 for (int i = 0; i < exceptionCount; i++) {
  58                         buffer.append('[').append(thrownExceptions[i].readableName());
  59                         buffer.append('-').append(exceptionThrowerFlowInfos[i].toString()).append(']');
  60                 }
  61                 return buffer.toString();
  62         }
  63
  64         public void recordHandlingException(
  65                 ReferenceBinding exceptionType,
  66                 UnconditionalFlowInfo flowInfo,
  67                 TypeBinding raisedException,
  68                 ASTNode invocationSite,
  69                 boolean wasMasked) {
  70
  71                 // even if unreachable code, need to perform unhandled exception diagnosis
  72                 int size = thrownExceptions.length;
  73                 if (exceptionCount == size) {
  74                         System.arraycopy(
  75                                 thrownExceptions,
  76                                 0,
  77                                 (thrownExceptions = new TypeBinding[size * 2]),
  78                                 0,
  79                                 size);
  80                         System.arraycopy(
  81                                 exceptionThrowers,
  82                                 0,
  83                                 (exceptionThrowers = new ASTNode[size * 2]),
  84                                 0,
  85                                 size);
  86                         System.arraycopy(
  87                                 exceptionThrowerFlowInfos,
  88                                 0,
  89                                 (exceptionThrowerFlowInfos = new FlowInfo[size * 2]),
  90                                 0,
  91                                 size);
  92                 }
  93                 thrownExceptions[exceptionCount] = raisedException;
  94                 exceptionThrowers[exceptionCount] = invocationSite;
  95                 exceptionThrowerFlowInfos[exceptionCount++] = flowInfo.copy();
  96         }
  97 }