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.reference;
018
019import com.google.dart.compiler.backend.js.ast.JsConditional;
020import com.google.dart.compiler.backend.js.ast.JsExpression;
021import com.google.dart.compiler.backend.js.ast.JsLiteral;
022import org.jetbrains.annotations.NotNull;
023import org.jetbrains.annotations.Nullable;
024import org.jetbrains.jet.lang.psi.JetDotQualifiedExpression;
025import org.jetbrains.jet.lang.psi.JetQualifiedExpression;
026import org.jetbrains.jet.lang.psi.JetSafeQualifiedExpression;
027import org.jetbrains.k2js.translate.context.TemporaryConstVariable;
028import org.jetbrains.k2js.translate.context.TranslationContext;
029
030import static org.jetbrains.k2js.translate.utils.TranslationUtils.isNotNullCheck;
031
032public enum CallType {
033    SAFE {
034        @NotNull
035        @Override
036        JsExpression constructCall(@Nullable JsExpression receiver, @NotNull CallConstructor constructor,
037                                   @NotNull TranslationContext context) {
038            assert receiver != null;
039
040            TemporaryConstVariable tempVar = context.getOrDeclareTemporaryConstVariable(receiver);
041            return new JsConditional(isNotNullCheck(tempVar.value()), constructor.construct(tempVar.value()), JsLiteral.NULL);
042        }
043    },
044    //TODO: bang qualifier is not implemented in frontend for now
045    // BANG,
046    NORMAL {
047        @NotNull
048        @Override
049        JsExpression constructCall(@Nullable JsExpression receiver, @NotNull CallConstructor constructor,
050                                   @NotNull TranslationContext context) {
051            return constructor.construct(receiver);
052        }
053    };
054
055    @NotNull
056    abstract JsExpression constructCall(@Nullable JsExpression receiver, @NotNull CallConstructor constructor,
057                                        @NotNull TranslationContext context);
058
059    @NotNull
060    public static CallType getCallTypeForQualifiedExpression(@NotNull JetQualifiedExpression expression) {
061        if (expression instanceof JetSafeQualifiedExpression) {
062            return SAFE;
063        }
064        assert expression instanceof JetDotQualifiedExpression;
065        return NORMAL;
066    }
067
068    public interface CallConstructor {
069        @NotNull
070        JsExpression construct(@Nullable JsExpression receiver);
071    }
072
073}