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// $Id$
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/**
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* Copyright (C) 2007 EDIT
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* European Distributed Institute of Taxonomy
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* http://www.e-taxonomy.eu
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*
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* The contents of this file are subject to the Mozilla Public License Version 1.1
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* See LICENSE.TXT at the top of this package for the full license terms.
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*/
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package eu.etaxonomy.cdm.strategy.match;
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import java.lang.annotation.Annotation;
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import java.lang.reflect.Field;
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import java.lang.reflect.GenericDeclaration;
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import java.lang.reflect.Type;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.HashMap;
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import java.util.List;
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import java.util.Map;
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import java.util.Set;
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import java.util.UUID;
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import org.apache.log4j.Logger;
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import sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl;
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import sun.reflect.generics.reflectiveObjects.TypeVariableImpl;
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import eu.etaxonomy.cdm.common.CdmUtils;
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import eu.etaxonomy.cdm.common.DoubleResult;
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import eu.etaxonomy.cdm.hibernate.HibernateProxyHelper;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.strategy.StrategyBase;
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import eu.etaxonomy.cdm.strategy.match.Match.ReplaceMode;
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/**
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* @author a.mueller
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* @created 06.08.2009
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* @version 1.0
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*/
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public class DefaultMatchStrategy extends StrategyBase implements IMatchStrategy {
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private static final long serialVersionUID = 5045874493910155162L;
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private static final Logger logger = Logger.getLogger(DefaultMatchStrategy.class);
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final static UUID uuid = UUID.fromString("69467b70-07ec-43a6-b779-3ec8d013837b");
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public static DefaultMatchStrategy NewInstance(Class<? extends IMatchable> matchClazz){
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return new DefaultMatchStrategy(matchClazz);
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}
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// protected Map<String, MatchMode> matchModeMap = new HashMap<String, MatchMode>();
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protected MatchMode defaultMatchMode = MatchMode.EQUAL;
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protected MatchMode defaultCollectionMatchMode = MatchMode.IGNORE;
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protected MatchMode defaultMatchMatchMode = MatchMode.MATCH;
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protected Class<? extends IMatchable> matchClass;
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protected Map<String, Field> matchFields;
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protected Matching matching = new Matching();
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protected DefaultMatchStrategy(Class<? extends IMatchable> matchClazz) {
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super();
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if (matchClazz == null){
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throw new IllegalArgumentException("Match class must not be null");
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}
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this.matchClass = matchClazz;
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initMapping();
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}
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/**
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* @return the merge class
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*/
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public Class<? extends IMatchable> getMatchClass() {
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return matchClass;
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.strategy.StrategyBase#getUuid()
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*/
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@Override
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protected UUID getUuid() {
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return uuid;
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.strategy.match.IMatchStrategy#getMatching()
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*/
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public Matching getMatching() {
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return matching;
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.strategy.match.IMatchStrategy#setMatchMode(java.lang.String, eu.etaxonomy.cdm.strategy.match.MatchMode)
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*/
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public void setMatchMode(String propertyName, MatchMode matchMode)
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throws MatchException {
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if (matchFields.containsKey(propertyName)){
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FieldMatcher fieldMatcher = FieldMatcher.NewInstance(matchFields.get(propertyName), matchMode);
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matching.setFieldMatcher(fieldMatcher);
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}else{
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throw new MatchException("The class " + matchClass.getName() + " does not contain a field named " + propertyName);
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}
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.strategy.match.IMatchStrategy#getMatchMode(java.lang.String)
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*/
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public MatchMode getMatchMode(String propertyName) {
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FieldMatcher fieldMatcher = matching.getFieldMatcher(propertyName);
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return fieldMatcher == null ? defaultMatchMode : fieldMatcher.getMatchMode();
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}
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/* (non-Javadoc)
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* @see eu.etaxonomy.cdm.strategy.match.IMatchStrategy#invoke(eu.etaxonomy.cdm.strategy.match.IMatchable, eu.etaxonomy.cdm.strategy.match.IMatchable)
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*/
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public <T extends IMatchable> boolean invoke(T matchFirst, T matchSecond)
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throws MatchException {
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boolean result = true;
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if (matchFirst == null || matchSecond == null){
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return false;
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}else if (matchFirst == matchSecond){
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return true;
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}else if (matchFirst.getClass() != matchSecond.getClass()){
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return false;
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}
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matching.deleteTemporaryMatchers(); //just in case they are not yet deleted during last invoke
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if (! matchClass.isAssignableFrom(matchFirst.getClass()) ){
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throw new MatchException("Match object are of different type than the match class (" + matchClass + ") this match strategy was created with");
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}else if (matchClass != matchFirst.getClass()){
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initializeSubclass(matchFirst.getClass());
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}
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try {
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result = invokeChecked(matchFirst, matchSecond, result);
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}catch (MatchException e) {
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throw e;
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}finally{
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matching.deleteTemporaryMatchers();
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}
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return result;
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}
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/**
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* @param class1
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*/
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private void initializeSubclass(Class<? extends IMatchable> instanceClass) {
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Map<String, Field> subClassFields = CdmUtils.getAllFields(instanceClass, matchClass, false, false, true, false);
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for (Field field: subClassFields.values()){
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initField(field, true);
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}
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}
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/**
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* @param <T>
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* @param matchFirst
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* @param matchSecond
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* @param result
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* @return
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* @throws MatchException
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*/
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private <T extends IMatchable> boolean invokeChecked(T matchFirst, T matchSecond,
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boolean result) throws MatchException {
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//matchFirst != matchSecond != null
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try {
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Map<String, List<MatchMode>> replaceMatchers = new HashMap<String, List<MatchMode>>();
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for (CacheMatcher cacheMatcher: matching.getCacheMatchers()){
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Field protectedField = cacheMatcher.getProtectedField(matching);
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boolean protected1 = protectedField.getBoolean(matchFirst);
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boolean protected2 = protectedField.getBoolean(matchFirst);
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if (protected1 != protected2){
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return false;
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}else if (protected1 == false){
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//ignore
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}else{
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String cache1 = (String)cacheMatcher.getField().get(matchFirst);
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String cache2 = (String)cacheMatcher.getField().get(matchSecond);
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result = cacheMatcher.getMatchMode().matches(cache1, cache2, null);
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if (result == false){
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return false;
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}
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List<DoubleResult<String, MatchMode>> replacementModes = cacheMatcher.getReplaceMatchModes(matching);
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for (DoubleResult<String, MatchMode> replacementMode: replacementModes ){
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String propertyName = replacementMode.getFirstResult();
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List<MatchMode> replaceMatcherList = replaceMatchers.get(propertyName);
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if (replaceMatcherList == null){
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replaceMatcherList = new ArrayList<MatchMode>();
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replaceMatchers.put(propertyName, replaceMatcherList);
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}
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replaceMatcherList.add(replacementMode.getSecondResult());
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}
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}
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}
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for (FieldMatcher fieldMatcher : matching.getFieldMatchers(true)){
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Field field = fieldMatcher.getField();
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List<MatchMode> replaceModeList = replaceMatchers.get(fieldMatcher.getPropertyName());
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if (replaceModeList == null){
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replaceModeList = new ArrayList<MatchMode>();
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}
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Class<?> fieldType = field.getType();
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logger.debug(field.getName() + ": ");
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if (isPrimitive(fieldType)){
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result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if (fieldType == String.class ){
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result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if(isUserType(fieldType)){
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result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if(fieldType == UUID.class){
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//result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if(isSingleCdmBaseObject(fieldType)){
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result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if (isCollection(fieldType)){
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result &= matchCollectionField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if(fieldType.isInterface()){
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result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else if(fieldType.isEnum()){
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result &= matchPrimitiveField(matchFirst, matchSecond, fieldMatcher, replaceModeList);
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}else{
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throw new RuntimeException("Unknown Object type for matching: " + fieldType);
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}
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// if (result == false){
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// return result;
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// }
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}
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} catch (Exception e) {
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throw new MatchException("Match Exception in invoke", e);
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}
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return result;
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}
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/**
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* @throws Exception
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*
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*/
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private <T extends IMatchable> boolean matchPrimitiveField(T matchFirst, T matchSecond, FieldMatcher fieldMatcher, List<MatchMode> replaceModeList) throws Exception {
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Field field = fieldMatcher.getField();
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Object value1 = checkEmpty(field.get(matchFirst));
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Object value2 = checkEmpty(field.get(matchSecond));
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IMatchStrategy matchStrategy = fieldMatcher.getMatchStrategy();
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boolean result = fieldMatcher.getMatchMode().matches(value1, value2, matchStrategy);
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for (MatchMode replaceMode : replaceModeList){
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if (result == true){
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break;
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}
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result |= replaceMode.matches(value1, value2, null);
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}
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logger.debug(fieldMatcher.getMatchMode() + ", " + field.getType().getName()+ ": " + result);
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return result;
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}
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/**
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* @throws Exception
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*
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*/
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private <T extends IMatchable> boolean matchCollectionField(T matchFirst, T matchSecond, FieldMatcher fieldMatcher, List<MatchMode> replaceModeList) throws Exception {
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boolean result;
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Field field = fieldMatcher.getField();
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Collection value1 = (Collection)field.get(matchFirst);
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Collection value2 = (Collection)field.get(matchSecond);
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MatchMode matchMode = fieldMatcher.getMatchMode();
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Class<?> fieldType = fieldMatcher.getField().getType();
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IMatchStrategy matchStrategy = fieldMatcher.getMatchStrategy();
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if (matchMode.isMatch()){
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Class collectionType = getTypeOfSet(field);
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if (! IMatchable.class.isAssignableFrom(collectionType)){
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//TODO
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return fieldMatcher.getMatchMode().matches(value1, value2, matchStrategy);
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}
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if (matchStrategy == null){
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matchStrategy = DefaultMatchStrategy.NewInstance(collectionType);
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}
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if (Set.class.isAssignableFrom(fieldType)){
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result = matchSet(value1, value2, matchStrategy);
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}else if (List.class.isAssignableFrom(fieldType)){
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result = matchList(value1, value2, matchStrategy);
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}else{
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throw new MatchException("Collection type not yet supported: " + fieldType);
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}
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}else{
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result = fieldMatcher.getMatchMode().matches(value1, value2, matchStrategy);
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}
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//cache replace modes
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for (MatchMode replaceMode : replaceModeList){
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if (result == true){
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break;
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}
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result |= replaceMode.matches(value1, value2, null);
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}
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logger.debug(fieldMatcher.getMatchMode() + ", " + field.getType().getName()+ ": " + result);
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return result;
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}
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/**
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* @param object
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* @return
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*/
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private Object checkEmpty(Object object) {
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if (object instanceof String){
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if (CdmUtils.isEmpty((String)object)){
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return null;
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}
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}
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return HibernateProxyHelper.deproxy(object);
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}
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/**
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* @param value1
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* @param matchStrategy
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* @return
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* @throws MatchException
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*/
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private boolean matchSet(Collection value1, Collection value2, IMatchStrategy matchStrategy)
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throws MatchException {
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boolean result;
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Set<IMatchable> set1 = (Set<IMatchable>)value1;
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Set<IMatchable> set2 = (Set<IMatchable>)value2;
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if (set1.size()!= set2.size()){
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return false;
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}
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result = true;
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for (IMatchable setItem1: set1){
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boolean matches = false;
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for (IMatchable setItem2: set2){
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matches |= matchStrategy.invoke(setItem1, setItem2);
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}
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if (matches == false){
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return false;
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}
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}
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return result;
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}
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/**
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* @param value1
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* @param matchStrategy
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* @return
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* @throws MatchException
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*/
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private boolean matchList(Collection value1, Collection value2, IMatchStrategy matchStrategy)
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throws MatchException {
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boolean result;
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List<IMatchable> list1 = (List<IMatchable>)value1;
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List<IMatchable> list2 = (List<IMatchable>)value2;
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if (list1.size()!= list2.size()){
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return false;
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}
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result = true;
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for (int i = 0; i < list1.size(); i++){
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IMatchable listObject1 = list1.get(i);
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IMatchable listObject2 = list2.get(i);
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if (! matchStrategy.invoke(listObject1, listObject2)){
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return false;
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}
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}
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return result;
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}
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private Class getTypeOfSet(Field field) throws MatchException{
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Type genericType = (ParameterizedTypeImpl)field.getGenericType();
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if (genericType instanceof ParameterizedTypeImpl){
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ParameterizedTypeImpl paraType = (ParameterizedTypeImpl)genericType;
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paraType.getRawType();
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Type[] arguments = paraType.getActualTypeArguments();
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if (arguments.length == 1){
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Class collectionClass;
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try {
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if (arguments[0] instanceof Class){
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return (Class)arguments[0];
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}else if(arguments[0] instanceof TypeVariableImpl){
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TypeVariableImpl typeVariable = (TypeVariableImpl)arguments[0];
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GenericDeclaration genericDeclaration = typeVariable.getGenericDeclaration();
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return (Class)genericDeclaration;
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}else{
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logger.warn("Unknown Type");
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throw new MatchException("");
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}
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} catch (Exception e) {
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logger.warn(e.getMessage());
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throw new MatchException("");
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}
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}else{
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logger.warn("Length of arguments <> 1");
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throw new MatchException("");
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}
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}else{
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logger.warn("Not a generic type of type ParameterizedTypeImpl");
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throw new MatchException("Collection type could not be determined. Generic type is not of type ParamterizedTypeImpl");
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}
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}
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390
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391
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/**
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392
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*
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393
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*/
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private void initMapping() {
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boolean includeStatic = false;
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boolean includeTransient = false;
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boolean makeAccessible = true;
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matchFields = CdmUtils.getAllFields(matchClass, CdmBase.class, includeStatic, includeTransient, makeAccessible, true);
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for (Field field: matchFields.values()){
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initField(field, false);
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}
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}
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403
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404
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/**
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* Initializes the matching for a single field
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* @param field
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*/
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private void initField(Field field, boolean temporary) {
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MatchMode matchMode = null;
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IMatchStrategy matchStrategy = null;
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411
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for (Annotation annotation : field.getAnnotations()){
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412
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if (annotation.annotationType() == Match.class){
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413
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Match match = ((Match)annotation);
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414
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matchMode = match.value();
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415
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if (matchMode == MatchMode.CACHE){
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ReplaceMode replaceMode = match.cacheReplaceMode();
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String[] cachePropertyReplaces = match.cacheReplacedProperties();
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418
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MatchMode replaceMatchMode = match.replaceMatchMode();
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419
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matching.addCacheMatcher(CacheMatcher.NewInstance(field, replaceMode, cachePropertyReplaces, replaceMatchMode));
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420
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421
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}else{
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422
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matching.setFieldMatcher(FieldMatcher.NewInstance(field, matchMode), temporary);
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423
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}
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424
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}
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425
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}
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426
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Class fieldType = field.getType();
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427
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if (matchMode == null){
|
428
|
if (isCollection(fieldType)){
|
429
|
matchMode = defaultCollectionMatchMode;
|
430
|
matching.setFieldMatcher(FieldMatcher.NewInstance(field, matchMode), temporary);
|
431
|
}else if (fieldType.isInterface()){
|
432
|
//TODO could be handled more sophisticated
|
433
|
matchMode = defaultMatchMatchMode;
|
434
|
matching.setFieldMatcher(FieldMatcher.NewInstance(field, matchMode, matchStrategy), temporary);
|
435
|
}else if (isSingleCdmBaseObject(fieldType)){
|
436
|
if (IMatchable.class.isAssignableFrom(fieldType)){
|
437
|
matchMode = defaultMatchMatchMode;
|
438
|
if (matchStrategy == null){
|
439
|
if (fieldType == this.matchClass){
|
440
|
matchStrategy = this;
|
441
|
}else{
|
442
|
matchStrategy = DefaultMatchStrategy.NewInstance(fieldType);
|
443
|
}
|
444
|
}
|
445
|
matching.setFieldMatcher(FieldMatcher.NewInstance(field, matchMode, matchStrategy), temporary);
|
446
|
}else{
|
447
|
matchMode = defaultMatchMode;
|
448
|
matching.setFieldMatcher(FieldMatcher.NewInstance(field, matchMode), temporary);
|
449
|
}
|
450
|
}else{
|
451
|
matchMode = defaultMatchMode;
|
452
|
matching.setFieldMatcher(FieldMatcher.NewInstance(field, matchMode), temporary);
|
453
|
}
|
454
|
}
|
455
|
}
|
456
|
|
457
|
|
458
|
}
|