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.resolve.calls.inference;
018    
019    import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
020    import org.jetbrains.jet.lang.resolve.calls.results.ResolutionDebugInfo;
021    import org.jetbrains.jet.lang.types.JetType;
022    
023    import java.util.Set;
024    
025    public class PrintingConstraintResolutionListener implements ConstraintResolutionListener {
026    
027        @Override
028        public void constraintsForUnknown(TypeParameterDescriptor typeParameterDescriptor, BoundsOwner typeValue) {
029            println("Constraints for " + typeParameterDescriptor);
030            printTypeValue(typeValue);
031        }
032    
033        @Override
034        public void constraintsForKnownType(JetType type, BoundsOwner typeValue) {
035            println("Constraints for " + type);
036            printTypeValue(typeValue);
037        }
038    
039        @Override
040        public void done(ConstraintSystemSolution solution, Set<TypeParameterDescriptor> typeParameterDescriptors) {
041            println("==================================================");
042            println("");
043            println("");
044        }
045    
046        @Override
047        public void log(Object... messageFragments) {
048            for (Object fragment : messageFragments) {
049                println(fragment);
050            }
051        }
052    
053        @Override
054        public void error(Object... messageFragments) {
055            for (Object fragment : messageFragments) {
056                println(fragment);
057            }
058        }
059    
060        private void printTypeValue(BoundsOwner typeValue) {
061            for (BoundsOwner bound : typeValue.getUpperBounds()) {
062                println(" :< " + bound);
063            }
064            for (BoundsOwner bound : typeValue.getLowerBounds()) {
065                println(" :> " + bound);
066            }
067        }
068    
069        private static void println(Object message) {
070            ResolutionDebugInfo.println(message);
071        }
072    }