001    /*
002     * Copyright 2010-2014 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.codegen.optimization.transformer;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.org.objectweb.asm.tree.MethodNode;
021    import org.jetbrains.org.objectweb.asm.tree.analysis.*;
022    
023    public abstract class MethodTransformer {
024        private final MethodTransformer delegate;
025    
026        protected MethodTransformer(MethodTransformer delegate) {
027            this.delegate = delegate;
028        }
029    
030        protected static <V extends Value> Frame<V>[] runAnalyzer(
031                @NotNull Analyzer<V> analyzer,
032                @NotNull String internalClassName,
033                @NotNull MethodNode node
034        ) {
035            try {
036                return analyzer.analyze(internalClassName, node);
037            }
038            catch (AnalyzerException e) {
039                throw new RuntimeException(e);
040            }
041        }
042        protected static <V extends Value> Frame<V>[] analyze(
043                @NotNull String internalClassName,
044                @NotNull MethodNode node,
045                @NotNull Interpreter<V> interpreter
046        ) {
047            return runAnalyzer(new Analyzer<V>(interpreter), internalClassName, node);
048        }
049    
050        public void transform(@NotNull String internalClassName, @NotNull MethodNode methodNode) {
051            if (delegate != null) {
052                delegate.transform(internalClassName, methodNode);
053            }
054        }
055    }