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    
017    package org.jetbrains.jet.lang.cfg.pseudocode;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.jet.lang.cfg.Label;
021    
022    import java.util.Collection;
023    import java.util.Collections;
024    
025    public abstract class AbstractJumpInstruction extends InstructionImpl {
026        private final Label targetLabel;
027        private Instruction resolvedTarget;
028    
029        public AbstractJumpInstruction(Label targetLabel, LexicalScope lexicalScope) {
030            super(lexicalScope);
031            this.targetLabel = targetLabel;
032        }
033    
034        public Label getTargetLabel() {
035            return targetLabel;
036        }
037    
038        public Instruction getResolvedTarget() {
039            return resolvedTarget;
040        }
041    
042        @NotNull
043        @Override
044        public Collection<Instruction> getNextInstructions() {
045            return Collections.singleton(getResolvedTarget());
046        }
047    
048        public void setResolvedTarget(Instruction resolvedTarget) {
049            this.resolvedTarget = outgoingEdgeTo(resolvedTarget);
050        }
051    
052        protected abstract AbstractJumpInstruction createCopy(@NotNull Label newLabel, @NotNull LexicalScope lexicalScope);
053    
054        final public Instruction copy(@NotNull Label newLabel) {
055            return updateCopyInfo(createCopy(newLabel, lexicalScope));
056        }
057    
058        @NotNull
059        @Override
060        protected Instruction createCopy() {
061            return createCopy(targetLabel, lexicalScope);
062        }
063    }