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 String debugLabel;
028        private SubroutineSinkInstruction sinkInstruction;
029    
030        public SubroutineExitInstruction(@NotNull JetElement subroutine, @NotNull String debugLabel) {
031            this.subroutine = subroutine;
032            this.debugLabel = debugLabel;
033        }
034    
035        public JetElement getSubroutine() {
036            return subroutine;
037        }
038    
039        public void setSink(SubroutineSinkInstruction instruction) {
040            sinkInstruction = (SubroutineSinkInstruction) outgoingEdgeTo(instruction);
041        }
042    
043        @NotNull
044        @Override
045        public Collection<Instruction> getNextInstructions() {
046            assert sinkInstruction != null;
047            return Collections.<Instruction>singleton(sinkInstruction);
048        }
049    
050        @Override
051        public void accept(InstructionVisitor visitor) {
052            visitor.visitSubroutineExit(this);
053        }
054    
055        @Override
056        public String toString() {
057            return debugLabel;
058        }
059    
060        @Override
061        protected Instruction createCopy() {
062            return new SubroutineExitInstruction(subroutine, debugLabel);
063        }
064    }