001/**
002 * Copyright 2005-2015 The Kuali Foundation
003 *
004 * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
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 */
016package org.kuali.rice.devtools.jpa.eclipselink.conv.parser.helper.resolver;
017
018import japa.parser.ast.CompilationUnit;
019import japa.parser.ast.ImportDeclaration;
020import japa.parser.ast.Node;
021import japa.parser.ast.body.ClassOrInterfaceDeclaration;
022import japa.parser.ast.body.FieldDeclaration;
023import japa.parser.ast.body.TypeDeclaration;
024import japa.parser.ast.expr.NameExpr;
025import japa.parser.ast.expr.QualifiedNameExpr;
026import japa.parser.ast.expr.SingleMemberAnnotationExpr;
027import org.apache.logging.log4j.Logger;
028import org.apache.logging.log4j.LogManager;
029import org.apache.ojb.broker.metadata.ClassDescriptor;
030import org.apache.ojb.broker.metadata.CollectionDescriptor;
031import org.apache.ojb.broker.metadata.DescriptorRepository;
032import org.kuali.rice.devtools.jpa.eclipselink.conv.ojb.OjbUtil;
033import org.kuali.rice.devtools.jpa.eclipselink.conv.parser.ParserUtil;
034import org.kuali.rice.devtools.jpa.eclipselink.conv.parser.helper.AnnotationResolver;
035import org.kuali.rice.devtools.jpa.eclipselink.conv.parser.helper.Level;
036import org.kuali.rice.devtools.jpa.eclipselink.conv.parser.helper.NodeData;
037
038import java.util.ArrayList;
039import java.util.Collection;
040import java.util.Collections;
041
042public class CustomizerResolver implements AnnotationResolver {
043    private static final Logger LOG = LogManager.getLogger(CustomizerResolver.class);
044    public static final String PACKAGE = "org.eclipse.persistence.annotations";
045    public static final String SIMPLE_NAME = "Customizer";
046
047    private final Collection<DescriptorRepository> descriptorRepositories;
048
049    public CustomizerResolver(Collection<DescriptorRepository> descriptorRepositories) {
050        this.descriptorRepositories = descriptorRepositories;
051    }
052
053    @Override
054    public String getFullyQualifiedName() {
055        return PACKAGE + "." + SIMPLE_NAME;
056    }
057
058    @Override
059    public Level getLevel() {
060        return Level.CLASS;
061    }
062
063    @Override
064    public NodeData resolve(Node node, String mappedClass) {
065        if (!(node instanceof ClassOrInterfaceDeclaration)) {
066            throw new IllegalArgumentException("this annotation belongs only on ClassOrInterfaceDeclaration");
067        }
068
069        final TypeDeclaration dclr = (TypeDeclaration) node;
070        if (!(dclr.getParentNode() instanceof CompilationUnit)) {
071            //handling nested classes
072            return null;
073        }
074        final String name = dclr.getName();
075        final String pckg = ((CompilationUnit) dclr.getParentNode()).getPackage().getName().toString();
076        final String enclosingClass = pckg + "." + name;
077        final Collection<String> customizedFieldsOnNode = getFieldsOnNode(dclr, getCustomizedFields(mappedClass));
078        if (customizedFieldsOnNode == null || customizedFieldsOnNode.isEmpty()) {
079            LOG.info(ResolverUtil.logMsgForClass(enclosingClass, mappedClass) + " has no customized fields");
080            return null;
081        }
082        return new NodeData(new SingleMemberAnnotationExpr(new NameExpr(SIMPLE_NAME), new NameExpr("CreateCustomizerFor" + customizedFieldsOnNode.toString())),
083                new ImportDeclaration(new QualifiedNameExpr(new NameExpr(PACKAGE), SIMPLE_NAME), false, false));
084    }
085
086    private Collection<String> getCustomizedFields(String clazz) {
087        final ClassDescriptor cd = OjbUtil.findClassDescriptor(clazz, descriptorRepositories);
088        if (cd != null) {
089            Collection<String> customizedFields = new ArrayList<String>();
090            for (CollectionDescriptor cld : (Collection<CollectionDescriptor>) cd.getCollectionDescriptors()) {
091                if (cld.getQueryCustomizer() != null) {
092                    customizedFields.add(cld.getAttributeName());
093                }
094            }
095            return customizedFields;
096        }
097        return Collections.emptySet();
098    }
099
100    private Collection<String> getFieldsOnNode(TypeDeclaration node, Collection<String> fields) {
101        final Collection<String> fieldsOnNode = new ArrayList<String>();
102
103        final Collection<FieldDeclaration> fds = ParserUtil.getFieldMembers(node.getMembers());
104        if (fields != null) {
105            for (FieldDeclaration f : fds) {
106                final String name = ParserUtil.getFieldName(f);
107                if (fields.contains(name)) {
108                    fieldsOnNode.add(name);
109                }
110            }
111        }
112
113        return fieldsOnNode;
114    }
115}