001/*
002 * Copyright 2010-2013 JetBrains s.r.o.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 * http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.jetbrains.jet.lang.cfg.pseudocode;
018
019import org.jetbrains.annotations.NotNull;
020import org.jetbrains.jet.lang.cfg.Label;
021
022import java.util.Collection;
023import java.util.Collections;
024
025public abstract class AbstractJumpInstruction extends InstructionImpl {
026    private final Label targetLabel;
027    private Instruction resolvedTarget;
028
029    public AbstractJumpInstruction(Label targetLabel) {
030        this.targetLabel = targetLabel;
031    }
032
033    public Label getTargetLabel() {
034        return targetLabel;
035    }
036
037    public Instruction getResolvedTarget() {
038        return resolvedTarget;
039    }
040
041    @NotNull
042    @Override
043    public Collection<Instruction> getNextInstructions() {
044        return Collections.singleton(getResolvedTarget());
045    }
046
047    public void setResolvedTarget(Instruction resolvedTarget) {
048        this.resolvedTarget = outgoingEdgeTo(resolvedTarget);
049    }
050
051    protected abstract AbstractJumpInstruction createCopy(@NotNull Label newLabel);
052
053    final public Instruction copy(@NotNull Label newLabel) {
054        return updateCopyInfo(createCopy(newLabel));
055    }
056
057    @Override
058    protected Instruction createCopy() {
059        return createCopy(targetLabel);
060    }
061}