001    /*
002     * Copyright 2010-2014 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.jet.lang.resolve.java.structure.impl;
018    
019    import com.intellij.psi.PsiExpression;
020    import com.intellij.psi.impl.JavaConstantExpressionEvaluator;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.annotations.Nullable;
023    import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
024    import org.jetbrains.jet.lang.evaluate.ConstantExpressionEvaluator;
025    import org.jetbrains.jet.lang.resolve.constants.CompileTimeConstant;
026    import org.jetbrains.jet.lang.resolve.constants.ConstantsPackage;
027    import org.jetbrains.jet.lang.resolve.java.structure.JavaField;
028    import org.jetbrains.jet.lang.resolve.java.structure.JavaPropertyInitializerEvaluator;
029    
030    public class JavaPropertyInitializerEvaluatorImpl implements JavaPropertyInitializerEvaluator {
031        @Nullable
032        @Override
033        public CompileTimeConstant<?> getInitializerConstant(@NotNull JavaField field, @NotNull PropertyDescriptor descriptor) {
034            PsiExpression initializer = ((JavaFieldImpl) field).getInitializer();
035            Object evaluatedExpression = JavaConstantExpressionEvaluator.computeConstantExpression(initializer, false);
036            if (evaluatedExpression != null) {
037                return ConstantsPackage.createCompileTimeConstant(
038                        evaluatedExpression,
039                        ConstantExpressionEvaluator.OBJECT$.isPropertyCompileTimeConstant(descriptor),
040                        false,
041                        true,
042                        descriptor.getType());
043            }
044            return null;
045        }
046    }