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.basic;
018
019import com.google.dart.compiler.backend.js.ast.JsExpression;
020import com.google.dart.compiler.backend.js.ast.JsInvocation;
021import com.google.dart.compiler.backend.js.ast.JsNameRef;
022import com.intellij.util.SmartList;
023import org.jetbrains.annotations.NotNull;
024import org.jetbrains.annotations.Nullable;
025import org.jetbrains.k2js.translate.context.TranslationContext;
026
027import java.util.List;
028
029import static org.jetbrains.k2js.translate.utils.ErrorReportingUtils.atLocation;
030
031public final class CallStandardMethodIntrinsic extends FunctionIntrinsic {
032    @NotNull
033    private final JsNameRef methodName;
034
035    private final boolean receiverShouldBeNotNull;
036    private final int expectedParamsNumber;
037
038    public CallStandardMethodIntrinsic(@NotNull JsNameRef methodName, boolean receiverShouldBeNotNull, int expectedParamsNumber) {
039        this.methodName = methodName;
040        this.receiverShouldBeNotNull = receiverShouldBeNotNull;
041        this.expectedParamsNumber = expectedParamsNumber;
042    }
043
044    @NotNull
045    @Override
046    public JsExpression apply(@Nullable JsExpression receiver,
047            @NotNull List<JsExpression> arguments,
048            @NotNull TranslationContext context) {
049        assert (receiver != null == receiverShouldBeNotNull);
050        assert arguments.size() == expectedParamsNumber : errorMessage(receiver, arguments);
051        return new JsInvocation(methodName, composeArguments(receiver, arguments));
052    }
053
054    @NotNull
055    private String errorMessage(@Nullable JsExpression receiver, @NotNull List<JsExpression> arguments) {
056        return "Incorrect number of arguments " + arguments.size() + " when expected " + expectedParamsNumber + " on method " + methodName + " " +
057               atLocation(receiver, arguments);
058    }
059
060    @NotNull
061    private static List<JsExpression> composeArguments(@Nullable JsExpression receiver, @NotNull List<JsExpression> arguments) {
062        if (receiver != null) {
063            List<JsExpression> args = new SmartList<JsExpression>(receiver);
064            args.addAll(arguments);
065            return args;
066        }
067        else {
068            return arguments;
069        }
070    }
071}