Source code

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.ImportDeclaration;
019import japa.parser.ast.expr.ArrayInitializerExpr;
020import japa.parser.ast.expr.BooleanLiteralExpr;
021import japa.parser.ast.expr.Expression;
022import japa.parser.ast.expr.MemberValuePair;
023import japa.parser.ast.expr.NameExpr;
024import japa.parser.ast.expr.NormalAnnotationExpr;
025import japa.parser.ast.expr.QualifiedNameExpr;
026import japa.parser.ast.expr.StringLiteralExpr;
027import org.apache.commons.lang.ClassUtils;
028import org.apache.commons.lang.StringUtils;
029import org.apache.logging.log4j.Logger;
030import org.apache.logging.log4j.LogManager;
031import org.apache.ojb.broker.metadata.ClassDescriptor;
032import org.apache.ojb.broker.metadata.CollectionDescriptor;
033import org.apache.ojb.broker.metadata.DescriptorRepository;
034import org.apache.ojb.broker.metadata.ObjectReferenceDescriptor;
035import org.kuali.rice.devtools.jpa.eclipselink.conv.ojb.OjbUtil;
036import org.kuali.rice.devtools.jpa.eclipselink.conv.parser.helper.NodeData;
037
038import java.util.ArrayList;
039import java.util.Collection;
040import java.util.Collections;
041import java.util.List;
042
043public class OneToManyResolver extends AbstractMappedFieldResolver {
044    private static final Logger LOG = LogManager.getLogger(OneToManyResolver.class);
045
046    public static final String PACKAGE = "javax.persistence";
047    public static final String SIMPLE_NAME = "OneToMany";
048
049    public OneToManyResolver(Collection<DescriptorRepository> descriptorRepositories) {
050        super(descriptorRepositories);
051    }
052    @Override
053    public String getFullyQualifiedName() {
054        return PACKAGE + "." + SIMPLE_NAME;
055    }
056
057    /** gets the annotation but also adds an import in the process if a Convert annotation is required. */
058    @Override
059    protected NodeData getAnnotationNodes(String enclosingClass, String fieldName, String mappedClass) {
060        final CollectionDescriptor cld = OjbUtil.findCollectionDescriptor(mappedClass, fieldName, descriptorRepositories);
061        if (cld != null) {
062            final List<MemberValuePair> pairs = new ArrayList<MemberValuePair>();
063            final Collection<ImportDeclaration> additionalImports = new ArrayList<ImportDeclaration>();
064
065            if (cld.isMtoNRelation()) {
066                return null;
067            }
068            /*  I don't think this is correct.
069            final String[] fkToItemClass = getFksToItemClass(cld);
070            if (fkToItemClass != null || fkToItemClass.length != 0) {
071                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has a collection descriptor for " + fieldName
072                        + " for a 1:M relationship but has fk-pointing-to-element-class configured");
073            }
074
075            final String[] fkToThisClass = getFksToThisClass(cld);
076            if (fkToThisClass != null || fkToThisClass.length != 0) {
077                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has a collection descriptor for " + fieldName
078                        + " for a 1:M relationship but has fk-pointing-to-this-class configured");
079            }
080            */
081            final Collection<String> fks = cld.getForeignKeyFields();
082            if (fks == null || fks.isEmpty()) {
083                LOG.error(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has a collection descriptor for " + fieldName
084                        + " but does not have any foreign keys configured");
085                return null;
086            }
087
088            final String itemClassName = cld.getItemClassName();
089            if (StringUtils.isBlank(itemClassName)) {
090                LOG.error(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has a reference descriptor for " + fieldName
091                        + " but does not class name attribute");
092            } else {
093                final String shortClassName = ClassUtils.getShortClassName(itemClassName);
094                final String packageName = ClassUtils.getPackageName(itemClassName);
095                pairs.add(new MemberValuePair("targetEntity", new NameExpr(shortClassName + ".class")));
096                additionalImports.add(new ImportDeclaration(new QualifiedNameExpr(new NameExpr(packageName), shortClassName), false, false));
097            }
098
099            final boolean proxy = cld.isLazy();
100            if (proxy) {
101                pairs.add(new MemberValuePair("fetch", new NameExpr("FetchType.LAZY")));
102                additionalImports.add(new ImportDeclaration(new QualifiedNameExpr(new NameExpr(PACKAGE), "FetchType"), false, false));
103            }
104
105            final boolean refresh = cld.isRefresh();
106            if (refresh) {
107                LOG.error(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has refresh set to " + refresh + ", unsupported conversion to @OneToOne attributes");
108            }
109
110            final List<Expression> cascadeTypes = new ArrayList<Expression>();
111            final boolean autoRetrieve = cld.getCascadeRetrieve();
112            if (autoRetrieve) {
113                cascadeTypes.add(new NameExpr("CascadeType.REFRESH"));
114            } else {
115                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-retrieve set to " + autoRetrieve + ", unsupported conversion to CascadeType");
116            }
117
118            final int autoDelete = cld.getCascadingDelete();
119            if (autoDelete == ObjectReferenceDescriptor.CASCADE_NONE) {
120                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-delete set to none, unsupported conversion to CascadeType");
121            } else if (autoDelete == ObjectReferenceDescriptor.CASCADE_LINK) {
122                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-delete set to link, unsupported conversion to CascadeType");
123            } else if (autoDelete == ObjectReferenceDescriptor.CASCADE_OBJECT) {
124                cascadeTypes.add(new NameExpr("CascadeType.REMOVE"));
125                pairs.add(new MemberValuePair("orphanRemoval", new BooleanLiteralExpr(true)));
126            } else {
127                LOG.error(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-delete set to an invalid value");
128            }
129
130            final int autoUpdate = cld.getCascadingStore();
131            if (autoUpdate == ObjectReferenceDescriptor.CASCADE_NONE) {
132                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-update set to none, unsupported conversion to CascadeType");
133            } else if (autoUpdate == ObjectReferenceDescriptor.CASCADE_LINK) {
134                LOG.warn(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-update set to link, unsupported conversion to CascadeType");
135            } else if (autoUpdate == ObjectReferenceDescriptor.CASCADE_OBJECT) {
136                cascadeTypes.add(new NameExpr("CascadeType.PERSIST"));
137            } else {
138                LOG.error(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " field has auto-update set to an invalid value");
139            }
140
141            if (!cascadeTypes.isEmpty()) {
142                pairs.add(new MemberValuePair("cascade", new ArrayInitializerExpr(cascadeTypes)));
143                additionalImports.add(new ImportDeclaration(new QualifiedNameExpr(new NameExpr(PACKAGE), "CascadeType"), false, false));
144            }
145
146            final NodeData nodeData;
147            if (isBidirectional(mappedClass, itemClassName)) {
148                LOG.info(ResolverUtil.logMsgForField(enclosingClass, fieldName, mappedClass) + " bi-directional OneToMany relationship detected");
149
150                BidirectionalOwnerRegistry registry = BidirectionalOwnerRegistry.getInstance();
151                if (registry.isOwnerItemClassManyToOne(mappedClass, itemClassName)) {
152                    nodeData =  new NodeData(new NormalAnnotationExpr(new NameExpr(SIMPLE_NAME),
153                            Collections.singletonList(new MemberValuePair("mappedBy", new StringLiteralExpr(getMappedBy(
154                                    mappedClass, itemClassName))))),
155                            new ImportDeclaration(new QualifiedNameExpr(new NameExpr(PACKAGE), SIMPLE_NAME), false, false),
156                            additionalImports);
157                } else {
158                    registry.assignItemClassAsOwnerManyToOne(mappedClass, itemClassName);
159
160                    nodeData =  new NodeData(new NormalAnnotationExpr(new NameExpr(SIMPLE_NAME),
161                            Collections.singletonList(new MemberValuePair("mappedBy", new StringLiteralExpr(getMappedBy(
162                                    mappedClass, itemClassName))))),
163                            new ImportDeclaration(new QualifiedNameExpr(new NameExpr(PACKAGE), SIMPLE_NAME), false, false),
164                            additionalImports);
165                }
166            } else {
167                nodeData =  new NodeData(new NormalAnnotationExpr(new NameExpr(SIMPLE_NAME), pairs),
168                        new ImportDeclaration(new QualifiedNameExpr(new NameExpr(PACKAGE), SIMPLE_NAME), false, false),
169                        additionalImports);
170            }
171
172            return nodeData;
173        }
174        return null;
175    }
176
177    private String[] getFksToItemClass(CollectionDescriptor cld) {
178        try {
179            return cld.getFksToItemClass();
180        } catch (NullPointerException e) {
181            return new String[] {};
182        }
183    }
184
185    private String [] getFksToThisClass(CollectionDescriptor cld) {
186        try {
187            return cld.getFksToItemClass();
188        } catch (NullPointerException e) {
189            return new String[] {};
190        }
191    }
192
193    private boolean isBidirectional(String thisClass, String itemClass) {
194        final ClassDescriptor cd = OjbUtil.findClassDescriptor(itemClass, descriptorRepositories);
195        Collection<ObjectReferenceDescriptor> ords = cd.getObjectReferenceDescriptors();
196        if (ords != null) {
197            for (ObjectReferenceDescriptor ord : ords) {
198                if (ord.getItemClassName().equals(thisClass)) {
199                    return true;
200                }
201            }
202        }
203        return false;
204    }
205
206    private String getMappedBy(String thisClass, String itemClass) {
207        final ClassDescriptor cd = OjbUtil.findClassDescriptor(itemClass, descriptorRepositories);
208        Collection<ObjectReferenceDescriptor> ords = cd.getObjectReferenceDescriptors();
209        if (ords != null) {
210            for (ObjectReferenceDescriptor ord : ords) {
211                if (ord.getItemClassName().equals(thisClass)) {
212                    return ord.getAttributeName();
213                }
214            }
215        }
216        return null;
217    }
218}