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*
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*/
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package eu.etaxonomy.cdm.persistence.dao.initializer;
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import java.io.Serializable;
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import java.util.ArrayList;
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import java.util.Collection;
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import java.util.Collections;
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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 org.apache.commons.lang.StringUtils;
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import org.hibernate.collection.internal.AbstractPersistentCollection;
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import eu.etaxonomy.cdm.common.CdmUtils;
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/**
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* @author a.mueller
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* @since 2013-10-25
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*/
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public class BeanInitNode implements Comparable<BeanInitNode>{
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// ************************ ATTRIBUTES *******************************/
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private final BeanInitNode parent;
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private final Map<String, BeanInitNode> children = new HashMap<String, BeanInitNode>();
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private final String path;
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private boolean isToManyInitialized = false;
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private boolean isToOneInitialized = false;
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private BeanInitNode wildcardChildCache;
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private final Map<Class<?>, Set<Object>> beans = new HashMap<Class<?>, Set<Object>>();
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private final Map<Class<?>, Set<Serializable>> lazyBeans = new HashMap<Class<?>, Set<Serializable>>();
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private final Map<Class<?>, Map<String, Set<Serializable>>> lazyCollections = new HashMap<Class<?>, Map<String,Set<Serializable>>>();
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//java.util.Set is not possible here to avoid initializing of collection during .add()
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private final List<AbstractPersistentCollection> uninitializedCollections = new ArrayList<AbstractPersistentCollection>();
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// *************************** STATIC METHODS *****************************************/
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public static BeanInitNode createInitTree(List<String> propertyPaths) {
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//sort paths //TODO needed?
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Collections.sort(propertyPaths);
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BeanInitNode root = new BeanInitNode(null, "");
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for (String fullPath : propertyPaths){
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String[] parts = fullPath.split("\\.");
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BeanInitNode lastNode = root;
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for (String part : parts){
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BeanInitNode child = lastNode.children.get(part);
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if (child == null){
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child = new BeanInitNode(lastNode, part);
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}
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lastNode = child;
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}
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}
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return root;
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}
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private static boolean isWildcard(String pathPart) {
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return pathPart.equals(AbstractBeanInitializer.LOAD_2ONE_WILDCARD) ||
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pathPart.equals(AbstractBeanInitializer.LOAD_2ONE_2MANY_WILDCARD);
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}
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//***************************** CONSTRUCTOR RELATED ****************************************/
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public BeanInitNode(BeanInitNode parent, String part) {
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this.path = CdmUtils.Nz(part);
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this.parent = parent;
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this.isToManyInitialized = this.path.equals(AbstractBeanInitializer.LOAD_2ONE_2MANY_WILDCARD);
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this.isToOneInitialized = this.path.equals(AbstractBeanInitializer.LOAD_2ONE_WILDCARD) || this.isToManyInitialized;
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if (parent != null){
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parent.addChild(part, this);
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}
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}
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private void addChild(String part, BeanInitNode child) {
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children.put(part, child);
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if (child.isWildcard()){
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//set wildcard child if not exists or if child is stronger then existing wildcard child
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if (this.wildcardChildCache == null || (! this.wildcardChildCache.isToManyInitialized) && child.isToManyInitialized ){
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this.wildcardChildCache = child;
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}
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}
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}
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// ************************** ***********************************************************/
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public BeanInitNode getChild(String param){
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return children.get(param);
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}
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public List<BeanInitNode> getChildrenList() {
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List<BeanInitNode> result = new ArrayList<BeanInitNode>(children.values());
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Collections.sort(result);
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return result;
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}
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public BeanInitNode getSibling(String param) {
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if (getPath().equals(param) || parent == null){
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return null;
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}else{
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return parent.getChild(param);
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}
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}
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public String getPath() {
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return path;
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}
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public boolean isRoot() {
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return StringUtils.isBlank(path);
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}
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public boolean hasChildren() {
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return children.size() > 0;
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}
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public BeanInitNode getWildcardChild(){
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return this.wildcardChildCache;
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}
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public boolean isWildcard() {
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return this.isToManyInitialized || this.isToOneInitialized;
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}
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public boolean hasWildcardChild() {
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return this.wildcardChildCache != null;
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}
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public boolean hasToManyWildcardChild() {
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return this.wildcardChildCache != null;
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}
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public boolean hasWildcardToManySibling() {
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BeanInitNode sibl = getWildcardSibling();
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return (sibl != null && sibl.isToManyInitialized);
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}
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private BeanInitNode getWildcardSibling() {
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if (!isWildcard() && parent == null){
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return parent.getWildcardChild();
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}else{
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return null;
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}
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}
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public boolean isToManyWildcard() {
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return path.equals(AbstractBeanInitializer.LOAD_2ONE_2MANY_WILDCARD);
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}
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// ******************* LAZY COLLECTION *****************************************/
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public void putLazyCollection(AbstractPersistentCollection collection) {
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String role = collection.getRole();
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String parameter = role.substring(role.lastIndexOf(".") + 1);
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//for embeddable classes we need also the parent parameter
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//TODO also allow recursive embedding
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String parentRole = role.substring(0, role.lastIndexOf("."));
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String parentParameter = parentRole.substring(parentRole.lastIndexOf(".") + 1);
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Class<?> ownerClass = collection.getOwner().getClass();
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if (Character.isLowerCase(parentParameter.charAt(0))){
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parameter = parentParameter + "." + parameter;
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}
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putLazyCollection(ownerClass, parameter, collection.getKey());
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this.uninitializedCollections.add(collection);
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}
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private void putLazyCollection(Class<?> ownerClazz, String parameter, Serializable id) {
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if (ownerClazz != null && parameter != null && id != null){
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Map<String, Set<Serializable>> lazyParams = lazyCollections.get(ownerClazz);
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if (lazyParams == null){
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lazyParams = new HashMap<String, Set<Serializable>>();
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lazyCollections.put(ownerClazz, lazyParams);
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}
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Set<Serializable> layzIds = lazyParams.get(parameter);
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if (layzIds == null){
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layzIds = new HashSet<Serializable>();
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lazyParams.put(parameter, layzIds);
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}
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layzIds.add(id);
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}else{
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throw new IllegalArgumentException("Class, parameter and id should not be null");
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}
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}
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public Map<Class<?>, Map<String, Set<Serializable>>> getLazyCollections(){
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return this.lazyCollections;
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}
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public List<AbstractPersistentCollection> getUninitializedCollections(){
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return this.uninitializedCollections;
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}
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public void resetLazyCollections(){
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this.lazyCollections.clear();
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this.uninitializedCollections.clear();
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}
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// ******************* LAZY BEAN *****************************************/
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public void putLazyBean(Class<?> clazz, Serializable id) {
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if (clazz != null && id != null){
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Set<Serializable> classedLazies= lazyBeans.get(clazz);
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if (classedLazies == null){
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classedLazies = new HashSet<Serializable>();
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lazyBeans.put(clazz, classedLazies);
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}
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classedLazies.add(id);
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}else{
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throw new IllegalArgumentException("Class and id should not be null");
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}
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}
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public Map<Class<?>, Set<Serializable>> getLazyBeans(){
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return this.lazyBeans;
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}
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public void resetLazyBeans(){
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this.lazyBeans.clear();
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}
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// ********************* BEANS ******************************/
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private Map<Class<?>, Set<Object>> getClassedBeans(){
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return this.beans;
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}
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/**
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* Returns beans represented by this node, split into implementing
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* classes.
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* @return
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*/
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public Map<Class<?>, Set<Object>> getBeans() {
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return this.beans;
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}
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public Map<Class<?>, Set<Object>> getParentBeans() {
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if (parent == null){
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return new HashMap<Class<?>, Set<Object>>();
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}else{
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return parent.getClassedBeans();
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}
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}
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/**
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* Add a bean represented by this node
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* @param bean
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*/
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public void addBean(Object bean) {
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if (! isWildcard()){
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if (bean != null){
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Class<?> key = bean.getClass();
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Set<Object> classedBeans = beans.get(key);
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if (classedBeans == null){
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classedBeans = new HashSet<Object>();
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beans.put(key, classedBeans);
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}
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classedBeans.add(bean);
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}
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}
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}
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/**
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* Adds beans represented by this node
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* @param beans a collection of beans to be added
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*/
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public void addBeans(Collection<?> beans) {
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for (Object bean : beans){
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addBean(bean);
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}
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}
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/**
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* Removes all beans representing this node.
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*/
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public void resetBeans(){
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beans.clear();
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}
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// ************************* OVERRIDES **********************************/
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@Override
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public int compareTo(BeanInitNode o) {
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String toMany = AbstractBeanInitializer.LOAD_2ONE_2MANY_WILDCARD;
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String toOne = AbstractBeanInitializer.LOAD_2ONE_WILDCARD;
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if (this.path.equals(toMany)){
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return -1;
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}else if (o.path.equals(toMany)){
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return 1;
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}else if (this.path.equals(toOne)){
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return -1;
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}else if (o.path.equals(toOne)){
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return 1;
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}else{
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return path.compareTo(o.path);
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}
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}
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@Override
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public String toString() {
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if(parent == null){
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return "/"; //for root node
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}else{
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String result = parent.toString() + ((parent.parent == null) ? "" : ".") + path;
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return result;
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}
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}
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public String toStringNoWildcard(){
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return toString().replace(".$", "").replace(".*", "");
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}
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public String toStringTree() {
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String result = (path.equals("") ? "/" : path) + "\n";
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for (BeanInitNode child : getChildrenList()){
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result += toString() + (result.endsWith("/\n") ? "" : ".") + child.toStringTree();
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}
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return result;
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}
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public boolean hasWildcardToOneSibling() {
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BeanInitNode sibl = getWildcardSibling();
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return (sibl != null && sibl.isToOneInitialized);
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}
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}
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