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.when;
018    
019    import org.jetbrains.annotations.NotNull;
020    import org.jetbrains.jet.codegen.binding.CodegenBinding;
021    import org.jetbrains.jet.codegen.state.GenerationState;
022    import org.jetbrains.jet.lang.psi.JetWhenExpression;
023    import org.jetbrains.org.objectweb.asm.Type;
024    
025    import java.util.HashSet;
026    import java.util.List;
027    import java.util.Set;
028    
029    public class MappingsClassesForWhenByEnum {
030        private final GenerationState state;
031        private final Set<String> generatedMappingClasses = new HashSet<String>();
032        private final MappingClassesForWhenByEnumCodegen mappingsCodegen;
033    
034        public MappingsClassesForWhenByEnum(@NotNull GenerationState state) {
035            this.state = state;
036            this.mappingsCodegen = new MappingClassesForWhenByEnumCodegen(state);
037        }
038    
039        public void generateMappingsClassForExpression(@NotNull JetWhenExpression expression) {
040            WhenByEnumsMapping mapping = state.getBindingContext().get(CodegenBinding.MAPPING_FOR_WHEN_BY_ENUM, expression);
041    
042            assert mapping != null : "mapping class should not be requested for non enum when";
043    
044            if (!generatedMappingClasses.contains(mapping.getMappingsClassInternalName())) {
045                List<WhenByEnumsMapping> mappings = state.getBindingContext().get(
046                        CodegenBinding.MAPPINGS_FOR_WHENS_BY_ENUM_IN_CLASS_FILE,
047                        mapping.getOuterClassInternalNameForExpression()
048                );
049    
050                assert mappings != null : "guaranteed by usage contract of EnumSwitchCodegen";
051    
052                Type mappingsClassType = Type.getObjectType(mapping.getMappingsClassInternalName());
053    
054                mappingsCodegen.generate(mappings, mappingsClassType, expression.getContainingJetFile());
055                generatedMappingClasses.add(mapping.getMappingsClassInternalName());
056            }
057        }
058    }