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/**
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* Copyright (C) 2015 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.cache;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.HashSet;
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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.TreeMap;
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import java.util.TreeSet;
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import org.hibernate.collection.internal.PersistentBag;
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import org.hibernate.collection.internal.PersistentList;
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import org.hibernate.collection.internal.PersistentMap;
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import org.hibernate.collection.internal.PersistentSet;
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import org.hibernate.collection.internal.PersistentSortedMap;
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import org.hibernate.collection.internal.PersistentSortedSet;
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import org.hibernate.collection.spi.PersistentCollection;
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import org.hibernate.proxy.HibernateProxy;
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import org.hibernate.proxy.LazyInitializer;
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import org.springframework.util.ReflectionUtils;
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import eu.etaxonomy.cdm.model.common.CdmBase;
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import eu.etaxonomy.cdm.model.common.PersistentMultiLanguageText;
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/**
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* @author cmathew
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* @since 17 Feb 2015
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*/
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public class ProxyUtils {
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public static enum CollectionType {
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SET("set"),
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LIST("list"),
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MAP("map"),
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BAG("bag");
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public String encodingSaveName;
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private CollectionType(String name){
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this.encodingSaveName = name;
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}
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@Override
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public String toString() {
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return this.encodingSaveName;
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}
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}
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public static Object getCollectionType(Object obj, Class<?> clazz) {
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if(obj != null) {
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if(obj instanceof List) {
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//the field in PersistentBag is called "bag" although it is an ArrayList -> #
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if(clazz.equals(PersistentBag.class)){
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return CollectionType.BAG;
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}
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return CollectionType.LIST;
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}
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if(obj instanceof Set) {
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return CollectionType.SET;
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}
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if(obj instanceof Map) {
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return CollectionType.MAP;
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}
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throw new ProxyUtilsException("Cannot get Collection Type for " + obj.getClass().getName());
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}
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return null;
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}
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public static Object getObject(PersistentCollection pc) {
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if(pc != null) {
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if(pc instanceof PersistentSet) {
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return new HashSet<>((Set<?>)pc);
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}
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if(pc instanceof PersistentSortedSet) {
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return new TreeSet<>((Set<?>)pc);
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}
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if(pc instanceof PersistentList || pc instanceof PersistentBag) {
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return new ArrayList<>((List<?>)pc);
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}
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if(pc instanceof PersistentMap || pc instanceof PersistentMultiLanguageText) {
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return new HashMap<>((Map<?,?>)pc);
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}
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if(pc instanceof PersistentSortedMap) {
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return new TreeMap<>((Map<?,?>)pc);
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}
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throw new ProxyUtilsException("Cannot get Collection field for type " + pc.getClass().getName());
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}
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return null;
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}
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public static CollectionField getCollectionField(PersistentCollection pc) {
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if(pc != null) {
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if(pc instanceof PersistentSet) {
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return new CollectionField(new HashSet<>((Set<?>)pc), CollectionType.SET);
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}
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if(pc instanceof PersistentSortedSet) {
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return new CollectionField(new TreeSet<>((Set<?>)pc), CollectionType.SET);
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}
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if(pc instanceof PersistentList) {
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return new CollectionField(new ArrayList<>((List<?>)pc), CollectionType.LIST);
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}
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if(pc instanceof PersistentMap || pc instanceof PersistentMultiLanguageText) {
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return new CollectionField(new HashMap<>((Map<?,?>)pc), CollectionType.MAP);
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}
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if(pc instanceof PersistentSortedMap) {
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return new CollectionField(new TreeMap<>((Map<?,?>)pc), CollectionType.MAP);
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}
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throw new ProxyUtilsException("Cannot get Collection field for type " + pc.getClass().getName());
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}
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return null;
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}
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public static class CollectionField {
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private final Object col;
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private final CollectionType type;
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public CollectionField(Object col, CollectionType type) {
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this.col = col;
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this.type = type;
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}
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public Object getCollection() {
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return this.col;
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}
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public CollectionType getType() {
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return this.type;
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}
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}
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/**
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* De-proxies the passed object <code>o</code> if it is an initialized proxy object,
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* otherwise <code>o</code> is returned.
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*/
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public static <T extends Object> T deproxyIfInitialized(T o) {
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if(o != null && o instanceof HibernateProxy) {
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LazyInitializer hli = ((HibernateProxy)o).getHibernateLazyInitializer();
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if(!hli.isUninitialized()) {
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@SuppressWarnings("unchecked")
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T result = (T)hli.getImplementation();
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return result;
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}
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}
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if(o != null && o instanceof PersistentCollection) {
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PersistentCollection pc = ((PersistentCollection)o);
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if(pc.wasInitialized()) {
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@SuppressWarnings("unchecked")
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T result = (T)ProxyUtils.getObject(pc);
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return result;
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}
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}
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return o;
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}
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/**
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* De-proxies the passed object <code>o</code> if it is an initialized proxy object,
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* otherwise <code>null</code> is returned.
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*/
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public static <T extends CdmBase> T deproxyOrNull(T o) {
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if(o != null && o instanceof HibernateProxy) {
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LazyInitializer hli = ((HibernateProxy)o).getHibernateLazyInitializer();
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if(!hli.isUninitialized()) {
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return (T)hli.getImplementation();
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} else {
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return null;
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}
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}
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return o;
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}
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// /**
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// * Currently not yet used.
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// * de-proxies the passed object <code>o</code> if it is an initialized proxy object,
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// * otherwise <code>null</code> is returned.
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// */
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// public static Object deproxyOrNull(Object o) {
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// if(o != null && o instanceof PersistentCollection) {
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// PersistentCollection pc = ((PersistentCollection)o);
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// if(pc.wasInitialized()) {
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// return ProxyUtils.getObject(pc);
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// } else {
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// return null;
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// }
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// }
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// return o;
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// }
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public static boolean isUninitializedProxy(Object o) {
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if(o != null && o instanceof HibernateProxy) {
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LazyInitializer hli = ((HibernateProxy)o).getHibernateLazyInitializer();
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if(hli.isUninitialized()) {
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return true;
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}
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}
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if(o != null && o instanceof PersistentCollection) {
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PersistentCollection pc = ((PersistentCollection)o);
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if(!pc.wasInitialized()) {
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return true;
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}
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}
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return false;
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}
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/*
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* ########################################### makes no sense without remoting ###########################################
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@SuppressWarnings("unchecked")
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public static Object remoteLoadPersistentCollectionIfProxy(Object o, UUID ownerUuid, String fieldName) throws ClassNotFoundException {
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if(o != null && o instanceof HibernateProxy) {
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LazyInitializer hli = ((HibernateProxy)o).getHibernateLazyInitializer();
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if(hli.isUninitialized()) {
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return CdmApplicationState.getCachedCommonService().find((Class<CdmBase>)Class.forName(hli.getEntityName()),
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((Integer)hli.getIdentifier()).intValue());
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}
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}
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if(o != null && o instanceof PersistentCollection) {
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PersistentCollection pc = ((PersistentCollection)o);
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if(!pc.wasInitialized()) {
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return CdmApplicationState.getCachedCommonService().initializeCollection(ownerUuid, fieldName);
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}
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}
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return o;
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}
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########################################### ########################################### */
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public static void setRoleValueInOwner(Object owner, String role, Object value) {
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if(role == null || role.isEmpty()) {
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throw new ProxyUtilsException("Role cannot be null or an empty string");
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}
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String fieldName = role.substring(role.lastIndexOf(".") + 1);
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Field field = ReflectionUtils.findField(owner.getClass(), fieldName);
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if(field == null) {
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throw new ProxyUtilsException("Field '" + fieldName
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+ "' not found when searching in class '" + owner.getClass() + "' and its supercalsses");
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}
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field.setAccessible(true);
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try {
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field.set(owner, value);
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} catch (IllegalArgumentException e) {
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throw new ProxyUtilsException(e);
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} catch (IllegalAccessException e) {
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throw new ProxyUtilsException(e);
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}
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}
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}
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