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.k2js.translate.intrinsic.functions.factories;
018    
019    import com.google.common.base.Predicate;
020    import com.google.common.base.Predicates;
021    import com.google.common.collect.Maps;
022    import org.jetbrains.annotations.NotNull;
023    import org.jetbrains.annotations.Nullable;
024    import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
025    import org.jetbrains.k2js.translate.intrinsic.functions.basic.FunctionIntrinsic;
026    import org.jetbrains.k2js.translate.intrinsic.functions.patterns.DescriptorPredicate;
027    
028    import java.util.Collection;
029    import java.util.Map;
030    
031    public abstract class CompositeFIF implements FunctionIntrinsicFactory {
032    
033        @NotNull final Map<DescriptorPredicate, FunctionIntrinsic> patternToIntrinsic = Maps.newHashMap();
034    
035        protected CompositeFIF() {
036        }
037    
038        @NotNull
039        @Override
040        public Predicate<FunctionDescriptor> getPredicate() {
041            Collection<DescriptorPredicate> patterns = patternToIntrinsic.keySet();
042            final DescriptorPredicate[] patterns1 = patterns.toArray(new DescriptorPredicate[patterns.size()]);
043            return new DescriptorPredicate() {
044                @Override
045                public boolean apply(@Nullable FunctionDescriptor descriptor) {
046                    return Predicates.or(patterns1).apply(descriptor);
047                }
048            };
049        }
050    
051        @NotNull
052        @Override
053        public FunctionIntrinsic getIntrinsic(@NotNull FunctionDescriptor descriptor) {
054            for (DescriptorPredicate pattern : patternToIntrinsic.keySet()) {
055                if (pattern.apply(descriptor)) {
056                    return patternToIntrinsic.get(pattern);
057                }
058            }
059            throw new IllegalStateException("Must have intrinsic for pattern.");
060        }
061    
062        protected void add(@NotNull DescriptorPredicate pattern, @NotNull FunctionIntrinsic intrinsic) {
063            patternToIntrinsic.put(pattern, intrinsic);
064        }
065    }