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.Arrays;
023    import java.util.Collection;
024    
025    public class ConditionalJumpInstruction extends AbstractJumpInstruction {
026        private final boolean onTrue;
027        private Instruction nextOnTrue;
028        private Instruction nextOnFalse;
029    
030        public ConditionalJumpInstruction(boolean onTrue, Label targetLabel) {
031            super(targetLabel);
032            this.onTrue = onTrue;
033        }
034    
035        public boolean onTrue() {
036            return onTrue;
037        }
038    
039        public Instruction getNextOnTrue() {
040            return nextOnTrue;
041        }
042    
043        public void setNextOnTrue(Instruction nextOnTrue) {
044            this.nextOnTrue = outgoingEdgeTo(nextOnTrue);
045        }
046    
047        public Instruction getNextOnFalse() {
048            return nextOnFalse;
049        }
050    
051        public void setNextOnFalse(Instruction nextOnFalse) {
052            this.nextOnFalse = outgoingEdgeTo(nextOnFalse);
053        }
054    
055        @NotNull
056        @Override
057        public Collection<Instruction> getNextInstructions() {
058            return Arrays.asList(getNextOnFalse(), getNextOnTrue());
059        }
060    
061        @Override
062        public void accept(InstructionVisitor visitor) {
063            visitor.visitConditionalJump(this);
064        }
065    
066        @Override
067        public String toString() {
068            String instr = onTrue ? "jt" : "jf";
069            return instr + "(" + getTargetLabel().getName() + ")";
070        }
071    
072        @Override
073        protected AbstractJumpInstruction createCopy(@NotNull Label newLabel) {
074            return new ConditionalJumpInstruction(onTrue, newLabel);
075        }
076    }