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.psi.JetElement;
021    
022    import java.util.Collection;
023    import java.util.Collections;
024    
025    public class SubroutineExitInstruction extends InstructionImpl {
026        private final JetElement subroutine;
027        private final boolean isError;
028        private SubroutineSinkInstruction sinkInstruction;
029    
030        public SubroutineExitInstruction(@NotNull JetElement subroutine, @NotNull LexicalScope lexicalScope, boolean isError) {
031            super(lexicalScope);
032            this.subroutine = subroutine;
033            this.isError = isError;
034        }
035    
036        public JetElement getSubroutine() {
037            return subroutine;
038        }
039    
040        public boolean isError() {
041            return isError;
042        }
043    
044        public void setSink(SubroutineSinkInstruction instruction) {
045            sinkInstruction = (SubroutineSinkInstruction) outgoingEdgeTo(instruction);
046        }
047    
048        @NotNull
049        @Override
050        public Collection<Instruction> getNextInstructions() {
051            assert sinkInstruction != null;
052            return Collections.<Instruction>singleton(sinkInstruction);
053        }
054    
055        @Override
056        public void accept(@NotNull InstructionVisitor visitor) {
057            visitor.visitSubroutineExit(this);
058        }
059    
060        @Override
061        public <R> R accept(@NotNull InstructionVisitorWithResult<R> visitor) {
062            return visitor.visitSubroutineExit(this);
063        }
064    
065        @Override
066        public String toString() {
067            return isError ? "<ERROR>" : "<END>";
068        }
069    
070        @NotNull
071        @Override
072        protected Instruction createCopy() {
073            return new SubroutineExitInstruction(subroutine, lexicalScope, isError);
074        }
075    }