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
017package org.jetbrains.k2js.translate.intrinsic.functions.factories;
018
019import com.google.common.base.Predicate;
020import com.google.common.base.Predicates;
021import com.google.common.collect.Maps;
022import org.jetbrains.annotations.NotNull;
023import org.jetbrains.annotations.Nullable;
024import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
025import org.jetbrains.k2js.translate.intrinsic.functions.basic.FunctionIntrinsic;
026import org.jetbrains.k2js.translate.intrinsic.functions.patterns.DescriptorPredicate;
027
028import java.util.Collection;
029import java.util.Map;
030
031public 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}