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    
017    package org.jetbrains.jet.lang.resolve.java.kotlinSignature;
018    
019    import com.intellij.openapi.project.Project;
020    import com.intellij.util.containers.ComparatorUtil;
021    import org.jetbrains.annotations.NotNull;
022    import org.jetbrains.jet.lang.descriptors.TypeParameterDescriptor;
023    import org.jetbrains.jet.lang.descriptors.impl.TypeParameterDescriptorImpl;
024    import org.jetbrains.jet.lang.psi.JetProperty;
025    import org.jetbrains.jet.lang.psi.JetPsiFactory;
026    import org.jetbrains.jet.lang.resolve.java.wrapper.PsiFieldWrapper;
027    import org.jetbrains.jet.lang.types.JetType;
028    
029    import java.util.HashMap;
030    
031    public class AlternativeFieldSignatureData extends ElementAlternativeSignatureData {
032        private final PsiFieldWrapper field;
033    
034        private JetType altReturnType;
035    
036        public AlternativeFieldSignatureData(@NotNull PsiFieldWrapper field, @NotNull JetType originalReturnType, boolean isVar) {
037            String signature = field.getSignatureAnnotation().signature();
038            this.field = field;
039    
040            if (signature.isEmpty()) {
041                setAnnotated(false);
042                return;
043            }
044    
045            setAnnotated(true);
046            Project project = field.getPsiMember().getProject();
047            JetProperty altPropertyDeclaration = JetPsiFactory.createProperty(project, signature);
048    
049            try {
050                checkForSyntaxErrors(altPropertyDeclaration);
051                checkFieldAnnotation(altPropertyDeclaration, field, isVar);
052                altReturnType = computeReturnType(originalReturnType, altPropertyDeclaration.getTypeRef(),
053                                                  new HashMap<TypeParameterDescriptor, TypeParameterDescriptorImpl>());
054            }
055            catch (AlternativeSignatureMismatchException e) {
056                setError(e.getMessage());
057            }
058        }
059    
060        @NotNull
061        public JetType getReturnType() {
062            checkForErrors();
063            return altReturnType;
064        }
065    
066        private static void checkFieldAnnotation(JetProperty altProperty, PsiFieldWrapper fieldWrapper, boolean isVar) {
067            if (!ComparatorUtil.equalsNullable(fieldWrapper.getName(), altProperty.getName())) {
068                throw new AlternativeSignatureMismatchException("Field name mismatch, original: %s, alternative: %s",
069                                                                fieldWrapper.getName(), altProperty.getName());
070            }
071    
072            if (altProperty.getTypeRef() == null) {
073                throw new AlternativeSignatureMismatchException("Field annotation for shouldn't have type reference");
074            }
075    
076            if (altProperty.getGetter() != null || altProperty.getSetter() != null) {
077                throw new AlternativeSignatureMismatchException("Field annotation for shouldn't have getters and setters");
078            }
079    
080            if (altProperty.isVar() != isVar) {
081                throw new AlternativeSignatureMismatchException("Wrong mutability in annotation for field");
082            }
083    
084            if (altProperty.getInitializer() != null) {
085                throw new AlternativeSignatureMismatchException("Default value is not expected in annotation for field");
086            }
087        }
088    }