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.annotations.Nullable;
021    import org.jetbrains.jet.lang.cfg.JetControlFlowProcessor;
022    import org.jetbrains.jet.lang.descriptors.VariableDescriptor;
023    import org.jetbrains.jet.lang.diagnostics.Diagnostic;
024    import org.jetbrains.jet.lang.psi.JetDeclaration;
025    import org.jetbrains.jet.lang.psi.JetElement;
026    import org.jetbrains.jet.lang.resolve.BindingContext;
027    import org.jetbrains.jet.lang.resolve.BindingContextUtils;
028    import org.jetbrains.jet.lang.resolve.BindingTrace;
029    import org.jetbrains.jet.util.slicedmap.ReadOnlySlice;
030    import org.jetbrains.jet.util.slicedmap.WritableSlice;
031    
032    import java.util.Collection;
033    
034    public class PseudocodeUtil {
035    
036        public static Pseudocode generatePseudocode(@NotNull JetDeclaration declaration, @NotNull final BindingContext bindingContext) {
037            BindingTrace mockTrace = new BindingTrace() {
038                @Override
039                public BindingContext getBindingContext() {
040                    return bindingContext;
041                }
042    
043                @Override
044                public <K, V> void record(WritableSlice<K, V> slice, K key, V value) {
045                }
046    
047                @Override
048                public <K> void record(WritableSlice<K, Boolean> slice, K key) {
049                }
050    
051                @Override
052                public <K, V> V get(ReadOnlySlice<K, V> slice, K key) {
053                    return bindingContext.get(slice, key);
054                }
055    
056                @NotNull
057                @Override
058                public <K, V> Collection<K> getKeys(WritableSlice<K, V> slice) {
059                    return bindingContext.getKeys(slice);
060                }
061    
062                @Override
063                public void report(@NotNull Diagnostic diagnostic) {
064                }
065            };
066            return new JetControlFlowProcessor(mockTrace).generatePseudocode(declaration);
067        }
068    
069        @Nullable
070        public static VariableDescriptor extractVariableDescriptorIfAny(@NotNull Instruction instruction, boolean onlyReference, @NotNull BindingContext bindingContext) {
071            JetElement element = null;
072            if (instruction instanceof ReadValueInstruction) {
073                element = ((ReadValueInstruction) instruction).getElement();
074            }
075            else if (instruction instanceof WriteValueInstruction) {
076                element = ((WriteValueInstruction) instruction).getlValue();
077            }
078            else if (instruction instanceof VariableDeclarationInstruction) {
079                element = ((VariableDeclarationInstruction) instruction).getVariableDeclarationElement();
080            }
081            return BindingContextUtils.extractVariableDescriptorIfAny(bindingContext, element, onlyReference);
082        }
083    }