| /* |
| * Copyright 2000-2009 JetBrains s.r.o. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| /* |
| * Created by IntelliJ IDEA. |
| * User: max |
| * Date: Jan 11, 2002 |
| * Time: 3:05:34 PM |
| * To change template for new class use |
| * Code Style | Class Templates options (Tools | IDE Options). |
| */ |
| package com.intellij.codeInspection.dataFlow; |
| |
| import com.intellij.codeInspection.dataFlow.instructions.FlushVariableInstruction; |
| import com.intellij.codeInspection.dataFlow.instructions.Instruction; |
| import com.intellij.codeInspection.dataFlow.value.DfaValueFactory; |
| import com.intellij.psi.PsiElement; |
| import com.intellij.psi.PsiVariable; |
| import gnu.trove.TObjectIntHashMap; |
| import org.jetbrains.annotations.Nullable; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class ControlFlow { |
| private final List<Instruction> myInstructions = new ArrayList<Instruction>(); |
| private final TObjectIntHashMap<PsiElement> myElementToStartOffsetMap = new TObjectIntHashMap<PsiElement>(); |
| private final TObjectIntHashMap<PsiElement> myElementToEndOffsetMap = new TObjectIntHashMap<PsiElement>(); |
| private final DfaValueFactory myFactory; |
| |
| public ControlFlow(final DfaValueFactory factory) { |
| myFactory = factory; |
| } |
| |
| public Instruction[] getInstructions(){ |
| return myInstructions.toArray(new Instruction[myInstructions.size()]); |
| } |
| |
| public int getInstructionCount() { |
| return myInstructions.size(); |
| } |
| |
| public ControlFlowOffset getNextOffset() { |
| final int currentSize = myInstructions.size(); |
| return new ControlFlowOffset() { |
| @Override |
| public int getInstructionOffset() { |
| return currentSize; |
| } |
| }; |
| } |
| |
| public void startElement(PsiElement psiElement) { |
| myElementToStartOffsetMap.put(psiElement, myInstructions.size()); |
| } |
| |
| public void finishElement(PsiElement psiElement) { |
| myElementToEndOffsetMap.put(psiElement, myInstructions.size()); |
| } |
| |
| public void addInstruction(Instruction instruction) { |
| instruction.setIndex(myInstructions.size()); |
| myInstructions.add(instruction); |
| } |
| |
| public void removeVariable(@Nullable PsiVariable variable) { |
| if (variable == null) return; |
| addInstruction(new FlushVariableInstruction(myFactory.getVarFactory().createVariableValue(variable, false))); |
| } |
| |
| public ControlFlowOffset getStartOffset(final PsiElement element) { |
| return new ControlFlowOffset() { |
| @Override |
| public int getInstructionOffset() { |
| return myElementToStartOffsetMap.get(element); |
| } |
| }; |
| } |
| |
| public ControlFlowOffset getEndOffset(final PsiElement element) { |
| return new ControlFlowOffset() { |
| @Override |
| public int getInstructionOffset() { |
| return myElementToEndOffsetMap.get(element); |
| } |
| }; |
| } |
| |
| public String toString() { |
| StringBuilder result = new StringBuilder(); |
| final List<Instruction> instructions = myInstructions; |
| |
| for (int i = 0; i < instructions.size(); i++) { |
| Instruction instruction = instructions.get(i); |
| result.append(Integer.toString(i)).append(": ").append(instruction.toString()); |
| result.append("\n"); |
| } |
| return result.toString(); |
| } |
| |
| public interface ControlFlowOffset { |
| int getInstructionOffset(); |
| } |
| |
| static ControlFlowOffset deltaOffset(final ControlFlowOffset delegate, final int delta) { |
| return new ControlFlowOffset() { |
| @Override |
| public int getInstructionOffset() { |
| return delegate.getInstructionOffset() + delta; |
| } |
| }; |
| } |
| |
| } |