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.operation;
018
019import com.google.dart.compiler.backend.js.ast.JsBinaryOperation;
020import com.google.dart.compiler.backend.js.ast.JsBinaryOperator;
021import com.google.dart.compiler.backend.js.ast.JsExpression;
022import org.jetbrains.annotations.NotNull;
023import org.jetbrains.jet.lang.descriptors.FunctionDescriptor;
024import org.jetbrains.jet.lang.psi.JetBinaryExpression;
025import org.jetbrains.jet.lang.types.expressions.OperatorConventions;
026import org.jetbrains.k2js.translate.context.TranslationContext;
027import org.jetbrains.k2js.translate.operation.OperatorTable;
028import org.jetbrains.k2js.translate.utils.JsDescriptorUtils;
029
030import static org.jetbrains.k2js.translate.utils.BindingUtils.getFunctionDescriptorForOperationExpression;
031import static org.jetbrains.k2js.translate.utils.PsiUtils.getOperationToken;
032
033public final class CompareToInstrinsic implements BinaryOperationIntrinsic {
034    @Override
035    public boolean isApplicable(@NotNull JetBinaryExpression expression, @NotNull TranslationContext context) {
036        if (!OperatorConventions.COMPARISON_OPERATIONS.contains(getOperationToken(expression))) {
037            return false;
038        }
039        FunctionDescriptor functionDescriptor = getFunctionDescriptorForOperationExpression(context.bindingContext(), expression);
040        assert functionDescriptor != null;
041        return JsDescriptorUtils.isStandardDeclaration(functionDescriptor);
042    }
043
044    @NotNull
045    @Override
046    public JsExpression apply(@NotNull JetBinaryExpression expression,
047            @NotNull JsExpression left,
048            @NotNull JsExpression right,
049            @NotNull TranslationContext context) {
050        JsBinaryOperator operator = OperatorTable.getBinaryOperator(getOperationToken(expression));
051        return new JsBinaryOperation(operator, left, right);
052    }
053}