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