zkbind/src/main/java/org/zkoss/bind/tracker/impl/TrackerImpl.java
/* TrackerImpl.java
Purpose:
Description:
History:
Aug 24, 2011 7:31:14 PM, Created by henrichen
Copyright (C) 2011 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.bind.tracker.impl;
import java.io.Serializable;
import java.lang.ref.WeakReference;
import java.util.Arrays;
import java.util.Collection;
import java.util.Collections;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.WeakHashMap;
import org.zkoss.bind.annotation.Immutable;
import org.zkoss.bind.impl.AllocUtil;
import org.zkoss.bind.impl.IndirectBinding;
import org.zkoss.bind.impl.WeakIdentityMap;
import org.zkoss.bind.sys.Binding;
import org.zkoss.bind.sys.ChildrenBinding;
import org.zkoss.bind.sys.FormBinding;
import org.zkoss.bind.sys.LoadBinding;
import org.zkoss.bind.sys.LoadChildrenBinding;
import org.zkoss.bind.sys.LoadPropertyBinding;
import org.zkoss.bind.sys.PropertyBinding;
import org.zkoss.bind.sys.ReferenceBinding;
import org.zkoss.bind.sys.tracker.Tracker;
import org.zkoss.bind.sys.tracker.TrackerNode;
import org.zkoss.bind.xel.zel.BindELContext;
import org.zkoss.lang.Strings;
import org.zkoss.util.IdentityHashSet;
import org.zkoss.zk.ui.Component;
import org.zkoss.zul.Combobox;
import org.zkoss.zul.Grid;
import org.zkoss.zul.ListModel;
import org.zkoss.zul.ListModelArray;
import org.zkoss.zul.ListModelList;
import org.zkoss.zul.Listbox;
import org.zkoss.zul.Radiogroup;
import org.zkoss.zul.Tabbox;
/**
* Implementation of dependency tracking.
* @author henrichen
* @since 6.0.0
*/
public class TrackerImpl implements Tracker, Serializable {
private static final long serialVersionUID = 1463169907348730644L;
protected Map<Component, Map<Object, TrackerNode>> _compMap; //comp -> path -> head TrackerNode
protected Map<Object, Set<TrackerNode>> _nullMap = new LinkedHashMap<Object, Set<TrackerNode>>(); //property -> Set of head TrackerNode that eval to null
protected transient Map<Object, Set<TrackerNode>> _beanMap = new WeakIdentityMap<Object, Set<TrackerNode>>(); //bean -> Set of TrackerNode
protected transient EqualBeansMap _equalBeansMap; //bean -> beans (use to manage equal beans)
public TrackerImpl() {
_equalBeansMap = newEqualBeansMap();
_compMap = initCompMap();
}
// provide a way for sub-class to override it for some situation
protected Map<Component, Map<Object, TrackerNode>> initCompMap() {
return new LinkedHashMap<Component, Map<Object, TrackerNode>>();
}
protected EqualBeansMap newEqualBeansMap() {
return new EqualBeansMap();
}
public void addTracking(Component comp, String[] series, Binding binding) {
//Track only LoadBinding
if (!(binding instanceof LoadBinding)) {
return;
}
final TrackerNode node = getOrCreateTrackerNode(comp, series);
//node is leaf of this series, add the binding to it
node.addBinding(binding);
}
public void addDependsOn(Component srcComp, String[] srcSeries, Binding srcBinding, Component dependsOnComp,
String[] dependsOnSeries) {
//Track only LoadBinding
if (!(srcBinding instanceof LoadBinding)) {
return;
}
if (dependsOnComp == null) {
dependsOnComp = srcComp; //share same component context for @DependsOn case
}
final TrackerNode dependsOnNode = getOrCreateTrackerNode(dependsOnComp, dependsOnSeries);
//bug# 1: depends-on is not working in nested C->B->A when A changed
final TrackerNode srcnode = getOrCreateTrackerNode(srcComp, srcSeries);
dependsOnNode.addAssociate(srcnode);
}
protected TrackerNode getOrCreateTrackerNode(Component comp, String[] series) {
Map<Object, TrackerNode> nodes = _compMap.get(comp);
TrackerNode parentNode = null;
for (String script : series) {
TrackerNode node = null;
if (parentNode == null) { //head node
node = nodes == null ? null : nodes.get(script);
if (node == null) {
node = newTrackerNode(script);
//ZK-2289
Map<Object, TrackerNode> nodes0 = AllocUtil.inst.putMap(nodes, script, node);
if (nodes != nodes0) { //Yes, use != instead of !equals()
_compMap.put(comp, nodes0);
}
}
} else {
node = parentNode.getDependent(script);
if (node == null) {
node = newTrackerNode(script);
}
parentNode.addDependent(script, node);
}
parentNode = node;
}
return parentNode;
}
//ZK-1989, sub-class could override this method to provide better tracker-node impl.
protected TrackerNode newTrackerNode(Object script) {
return new TrackerNodeImpl(AllocUtil.inst.processScript(script)); //ZK-2289
}
public void removeTrackings(Set<Component> comps) {
final Set<TrackerNode> removed = new LinkedHashSet<TrackerNode>();
for (Component comp : comps) {
final Map<Object, TrackerNode> nodesMap = _compMap.remove(comp);
if (nodesMap != null) {
final Collection<TrackerNode> nodes = nodesMap.values();
for (TrackerNode node : nodes) {
removed.add(node);
removed.addAll(node.getDependents());
}
}
}
if (removed.size() > 0) {
removeAllFromBeanMap(removed);
removeAllFromNullMap(removed);
}
}
public void removeTrackings(Component comp) {
final Map<Object, TrackerNode> nodesMap = _compMap.remove(comp);
if (nodesMap != null) {
final Set<TrackerNode> removed = new LinkedHashSet<TrackerNode>();
final Collection<TrackerNode> nodes = nodesMap.values();
for (TrackerNode node : nodes) {
removed.add(node);
removed.addAll(node.getDependents());
}
removeAllFromBeanMap(removed);
removeAllFromNullMap(removed);
}
}
//remove all specified nodes from the _nullMap
protected void removeAllFromNullMap(Set<TrackerNode> removed) {
removeNodes(_nullMap.values(), removed);
}
private void getLoadBindingsPerProperty(Collection<TrackerNode> nodes, String prop,
LinkedHashSet<LoadBinding> bindings, LinkedHashSet<Object> kidbases, Set<TrackerNode> visited) {
if (".".equals(prop)) { //all base object
for (TrackerNode node : nodes) {
getLoadBindings0(node, bindings, kidbases, visited);
}
} else if ("*".equals(prop)) { //all binding properties of the base object
for (TrackerNode node : nodes) {
final Set<TrackerNode> kids = node.getDirectDependents();
// refix for ZK-1787 test cases.
for (LoadBinding binding : node.getLoadBindings()) {
if (testBindingRendererCase(binding))
bindings.add(binding);
}
getNodesLoadBindings(kids, bindings, kidbases, visited);
}
} else {
boolean bracket = BindELContext.isBracket(prop);
int index = bracket ? Integer.parseInt(prop.substring(1, prop.length() - 1)) : -1;
for (TrackerNode node : nodes) {
Set<TrackerNode> dependents = node.getDependents(prop);
if (bracket && dependents.isEmpty()) {
Object bean = node.getBean();
if (bean instanceof List<?>) {
kidbases.add(((List<?>) bean).get(index));
} else if (bean instanceof ListModel<?>) {
if (bean instanceof ListModelArray) {
kidbases.add(((ListModelArray<Object>) bean).get(index));
} else if (bean instanceof ListModelList<?>) {
kidbases.add(((ListModelList<Object>) bean).get(index));
}
}
} else {
for (TrackerNode kid : dependents) {
if (kid != null) {
getLoadBindings0(kid, bindings, kidbases, visited);
}
}
}
}
}
}
// refix for ZK-2552
// we need to add an indirect binding here.
private boolean testBindingRendererCase(LoadBinding binding) {
if (binding instanceof LoadChildrenBinding)
return true;
if (binding instanceof LoadPropertyBinding) {
LoadPropertyBinding lb = (LoadPropertyBinding) binding;
if ("model".equals(lb.getFieldName())) {
Component comp = lb.getComponent();
if (comp instanceof Listbox || comp instanceof Grid || comp instanceof Tabbox
|| comp instanceof Radiogroup || comp instanceof Combobox)
return true;
}
}
return false;
}
public Set<LoadBinding> getLoadBindings(Object base, String prop) {
final LinkedHashSet<LoadBinding> bindings = new LinkedHashSet<LoadBinding>();
final Set<TrackerNode> visited = new LinkedHashSet<TrackerNode>();
collectLoadBindings(base, prop, bindings, visited);
return bindings;
}
protected Collection<TrackerNode> getAllTrackerNodes() {
Set<TrackerNode> all = null;
final Collection<Map<Object, TrackerNode>> nodesMaps = _compMap.values();
if (nodesMaps != null && !nodesMaps.isEmpty()) {
all = new LinkedHashSet<TrackerNode>();
for (Map<Object, TrackerNode> nodesMap : nodesMaps) {
final Collection<TrackerNode> nodes = nodesMap.values();
if (nodes != null) {
all.addAll(nodes);
}
}
}
return all;
}
private void collectLoadBindings(Object base, String prop, LinkedHashSet<LoadBinding> bindings,
Set<TrackerNode> visited) {
final LinkedHashSet<Object> kidbases = new LinkedHashSet<Object>(); //collect kid as base bean
if (base != null) {
final Set<TrackerNode> nodes = getAllTrackerNodesByBean(base);
if (nodes != null && !nodes.isEmpty()) {
getLoadBindingsPerProperty(nodes, prop, bindings, kidbases, visited);
}
} else { //base == null)
if ("*".equals(prop)) {
for (Set<TrackerNode> basenodes : _nullMap.values()) {
getNodesLoadBindings(basenodes, bindings, kidbases, visited);
}
} else {
final Set<TrackerNode> basenodes = _nullMap.get(prop);
getNodesLoadBindings(basenodes, bindings, kidbases, visited);
}
}
for (Object kidbase : kidbases) {
collectLoadBindings(kidbase, "*", bindings, visited); //recursive, for kid base
}
}
protected TrackerNode getTrackerNodePerComponentScript(Object comp, Object script) {
//locate head TrackerNodes of this component
final Map<Object, TrackerNode> bindingNodes = _compMap.get(comp);
return bindingNodes != null ? bindingNodes.get(script) : null;
}
public void tieValue(Object comp, Object base, Object script, Object propName, Object value, Object basePath) {
if (value instanceof IndirectBinding) {
value = ((IndirectBinding) value).getValue(null);
}
if (base == null) { //track from component
final TrackerNode node = getTrackerNodePerComponentScript(comp, script);
//ZK-877: NPE in a save only binding
//No corresponding LoadBinding with the head script in the specified component.
if (node != null) {
if (value != null) {
addBeanMap(node, value, basePath);
} else {
removeAllBeanMap(node); //dependent nodes shall be null, too. Remove them from _beanMap
addNullMap(node); //head TrackerNode evaluate to null
}
}
} else {
final Set<TrackerNode> baseNodes = getAllTrackerNodesByBean(base);
if (baseNodes != null) { //FormBinding will keep base nodes only (so no associated dependent nodes)
final Set<TrackerNode> propNodes = new LinkedHashSet<TrackerNode>(); //normal nodes; i.e. a base + property node. e.g. vm.selectedPerson
for (TrackerNode baseNode : baseNodes) {
for (TrackerNode node : baseNode.getDependents(script)) {
if (node == null) { //FormBinding will keep base nodes only (so no associated dependent nodes)
continue;
}
// ZK-2552: we need to ignore if the target component in reference binding
// is different from the given component, because they may bind with a same
// data object with the same EL expression.
boolean ignore = false;
for (ReferenceBinding refBinding : node.getReferenceBindings()) {
if (refBinding.getComponent() == comp) {
ignore = false;
break;
}
ignore = true;
}
// don't need to update with a wrong target component.
if (ignore)
continue;
if (BindELContext.isBracket((String) script)) {
if (!baseNode.isPropNameNodeMapped(node)) {
baseNode.tieProperty(propName, node);
propNodes.add(node);
} else {
// ZK-5043, tie property if the propName is text, not variable
if (script instanceof String) {
String expr = ((String) script).substring(
1, ((String) script).length() - 1);
if (!Strings.isEmpty(expr) && expr.charAt(0) == '\'' && expr.charAt(expr.length() - 1) == '\'') {
baseNode.tieProperty(propName, node);
propNodes.add(node);
}
}
}
} else {
propNodes.add(node);
}
}
}
if (value != null) {
for (TrackerNode node : propNodes) { //normal nodes
addBeanMap(node, value, basePath);
}
} else { //value == null
for (TrackerNode node : propNodes) { //normal nodes
removeAllBeanMap(node); //dependent nodes shall be null, too. Remove them from _beanMap
}
}
}
}
}
//add node into the _beanMap
protected void addBeanMap(TrackerNode node, Object value, Object basePath) {
//add node into _beanMap
if (!testEqualsBean(node.getBean(), value)) {
//try to remove from the _beanMap
removeBeanMap(node);
//add into _beanMap
if (value.getClass().getAnnotation(Immutable.class) == null) {
Set<TrackerNode> nodes = _beanMap.get(value);
//ZK-2289
final Set<TrackerNode> nodes0 = AllocUtil.inst.addLinkedHashSet(nodes, node);
if (nodes == null) {
_equalBeansMap.put(value);
}
if (nodes != nodes0) { // yes, !=; not !equals
_beanMap.put(value, nodes0);
}
//only when value is not a primitive that we shall store it
node.setBean(value);
}
}
//maybe a head node, try remove it from the nullMap
removeNullMap(node);
}
//add head node into the _nullMap
private void addNullMap(TrackerNode node) {
//add node into _nullMap
final Object propName = node.getFieldScript();
final Set<TrackerNode> nodes = _nullMap.get(propName);
//ZK-2289
final Set<TrackerNode> nodes0 = AllocUtil.inst.addLinkedHashSet(nodes, node);
if (nodes != nodes0) { //Yes, user != instead of !equals()
_nullMap.put(propName, nodes0);
}
//remove node from the _beanMap
removeBeanMap(node);
}
//remove head node from the _nullMap
private void removeNullMap(TrackerNode node) {
final Object propName = node.getFieldScript();
final Set<TrackerNode> nodes = _nullMap.get(propName);
if (nodes != null) {
nodes.remove(node);
if (nodes.isEmpty()) {
_nullMap.remove(propName);
}
}
}
//remove this node and all its dependent nodes from _beanMap
private void removeAllBeanMap(TrackerNode node) {
removeBeanMap(node);
//all dependent node shall be removed, too.
final Set<TrackerNode> kidnodes = node.getDependents();
for (TrackerNode kid : kidnodes) {
removeBeanMap(kid);
}
}
//remove node from the _beanMap
protected void removeBeanMap(TrackerNode node) {
final Object value = node.getBean();
if (value != null) {
node.setBean(null);
final Set<TrackerNode> nodes = _beanMap.get(value);
if (nodes != null) {
nodes.remove(node); //remove this node from the _beanMap
if (nodes.isEmpty()) {
_equalBeansMap.remove(value); //sync the equalBeanMap
_beanMap.remove(value);
}
}
}
}
private void getNodesLoadBindings(Set<TrackerNode> basenodes, LinkedHashSet<LoadBinding> bindings,
LinkedHashSet<Object> kidbases, Set<TrackerNode> visited) {
if (basenodes != null) {
for (TrackerNode node : basenodes) {
if (node != null) {
getLoadBindings0(node, bindings, kidbases, visited);
}
}
}
}
private void getLoadBindings0(TrackerNode node, LinkedHashSet<LoadBinding> bindings, Set<Object> kidbases,
Set<TrackerNode> visited) {
if (visited.contains(node)) { //already visited
return;
}
visited.add(node);
bindings.addAll(node.getLoadBindings());
final Set<ReferenceBinding> refBindings = node.getReferenceBindings();
bindings.addAll(refBindings);
for (ReferenceBinding refBinding : refBindings) {
refBinding.invalidateCache();
//ZK-950: The expression reference doesn't update while change the instant of the reference
//Have to load bindings that refer this ReferenceBinding as well
collectLoadBindings(refBinding, ".", bindings, visited); //recursive
}
//bug #1: depends-on is not working in nested C->B->A when A changed
for (TrackerNode associate : node.getAssociates()) {
getLoadBindings0(associate, bindings, kidbases, visited); //recursive
}
final Object kidbase = node.getBean();
if (kidbases != null && kidbase != null) {
kidbases.add(kidbase);
} else {
//check dependents
final Set<TrackerNode> nodes = node.getDirectDependents();
for (TrackerNode kid : nodes) {
getLoadBindings0(kid, bindings, null, visited); //recursive
}
}
}
//given base and postfix, found the associated TrackerNode.
@SuppressWarnings("unused")
private Set<TrackerNode> getNodes(Object base, String postfix) {
Set<TrackerNode> nodes = getAllTrackerNodesByBean(base);
String[] props = postfix.split("\\.");
for (String prop : props) {
nodes = getDependents(nodes, prop);
}
return nodes;
}
//get dependents of a group of TrackerNodes.
private Set<TrackerNode> getDependents(Set<TrackerNode> parentnodes, String prop) {
final Set<TrackerNode> kidnodes = new LinkedHashSet<TrackerNode>();
for (TrackerNode node : parentnodes) {
for (TrackerNode kid : node.getDependents(prop)) {
if (kid != null) {
kidnodes.add(kid);
}
}
}
return kidnodes;
}
//remove all specified nodes from the _beanMap
protected void removeAllFromBeanMap(Collection<TrackerNode> removed) {
final Collection<Entry<Object, Set<TrackerNode>>> nodesets = _beanMap.entrySet();
for (final Iterator<Entry<Object, Set<TrackerNode>>> it = nodesets.iterator(); it.hasNext();) {
final Entry<Object, Set<TrackerNode>> nodeset = it.next();
final Object bean = nodeset.getKey();
nodeset.getValue().removeAll(removed);
if (nodeset.getValue().isEmpty()) {
it.remove();
_equalBeansMap.remove(bean);
}
}
}
private void removeNodes(Collection<Set<TrackerNode>> nodesets, Collection<TrackerNode> removed) {
for (final Iterator<Set<TrackerNode>> it = nodesets.iterator(); it.hasNext();) {
final Set<TrackerNode> nodeset = it.next();
nodeset.removeAll(removed);
if (nodeset.isEmpty()) {
it.remove();
}
}
}
private Set<TrackerNode> getAllTrackerNodesByBean(Object bean) {
final Set<TrackerNode> results = new LinkedHashSet<TrackerNode>();
getAllTrackerNodesByBean0(bean, results);
return results;
}
private void getAllTrackerNodesByBean0(Object bean, Set<TrackerNode> results) {
final Set<Object> beans = _equalBeansMap.getEqualBeans(bean); //return a set of equal beans
final Set<TrackerNode> nodes = new LinkedHashSet<TrackerNode>();
for (Object obj : beans) {
Set<TrackerNode> beanNodes = _beanMap.get(obj);
if (beanNodes != null) { //zk-1185, _beanMap could contains no such entry, and returned null.
nodes.addAll(beanNodes);
}
}
results.addAll(nodes);
getAllTrackerNodesByBeanNodes(nodes, results);
}
//ZK-950: The expression reference doesn't update while change the instant of the reference
//Check if the passed in bean nodes contains ReferenceBindings; have to collect those
//nodes that refers those ReferenceBindings as well
private void getAllTrackerNodesByBeanNodes(Set<TrackerNode> nodes, Set<TrackerNode> results) {
for (TrackerNode node : nodes) {
final Set<ReferenceBinding> refBindings = node.getReferenceBindings();
for (ReferenceBinding refBinding : refBindings) {
getAllTrackerNodesByBean0(refBinding, results); //recursive
}
}
}
//Returns equal beans with the given bean in an IdentityHashSet()
public Set<Object> getEqualBeans(Object bean) {
return _equalBeansMap.getEqualBeans(bean); //return a set of equal beans
}
private void readObject(java.io.ObjectInputStream s) throws java.io.IOException, ClassNotFoundException {
s.defaultReadObject();
_beanMap = new WeakIdentityMap<Object, Set<TrackerNode>>(); //bean -> Set of TrackerNode
_equalBeansMap = new EqualBeansMap(); //bean -> beans (use to manage equal beans)
}
protected static boolean testEqualsBean(Object nodeBean, Object bean) {
if (nodeBean == bean)
return true;
if (nodeBean instanceof WeakReference) {
nodeBean = ((WeakReference) nodeBean).get();
}
return bean.equals(nodeBean);
}
protected static class EqualBeansMap {
private transient WeakHashMap<Object, EqualBeans> _innerMap = new WeakHashMap<Object, EqualBeans>(); //bean -> EqualBeans
private transient WeakIdentityMap<Object, EqualBeans> _identityMap = new WeakIdentityMap<Object, EqualBeans>(); //bean -> EqualBeans
//bug #ZK-678: NotifyChange on Map is not work
private void syncInnerMap(EqualBeans equalBeans, Object bean) {
//hashCode of bean has changed, must reset
boolean found = false;
final WeakHashMap<Object, EqualBeans> newMap = new WeakHashMap<Object, EqualBeans>(_innerMap.size());
//ZK-781. Copy one by one to reset _innerMap
for (Iterator<Entry<Object, EqualBeans>> it = _innerMap.entrySet().iterator(); it.hasNext();) {
final Entry<Object, EqualBeans> entry = it.next();
final EqualBeans beans = entry.getValue();
if (equalBeans.equals(beans)) { //found
found = true;
continue;
}
newMap.put(entry.getKey(), entry.getValue());
}
if (found) {
_innerMap = newMap;
//reput equalBeans (item inside might not equal to each other any more)
for (Object b : equalBeans.getBeans()) {
_identityMap.remove(b);
put(b); //recursive
}
}
}
public void put(Object bean) {
EqualBeans equalBeans = _innerMap.get(bean);
if (equalBeans == null) { //hashcode might changed
equalBeans = _identityMap.remove(bean);
if (equalBeans != null) { //hashcode is changed
syncInnerMap(equalBeans, bean);
return;
} else { //a new bean
equalBeans = new EqualBeans(bean);
_innerMap.put(bean, equalBeans);
}
} else {
equalBeans.put(bean);
}
_identityMap.put(bean, equalBeans);
}
public void remove(Object bean) {
EqualBeans equalBeans = _innerMap.remove(bean);
if (equalBeans != null) {
_identityMap.remove(bean);
removeFromEqualBeansAndReput(equalBeans, bean);
} else { //hashcode might changed
equalBeans = _identityMap.remove(bean);
if (equalBeans != null) { //hashcode is changed
//hashCode of bean has changed, must reset
boolean found = false;
final WeakHashMap<Object, EqualBeans> newMap = new WeakHashMap<Object, EqualBeans>(
_innerMap.size());
//ZK-781. Copy one by one to reset _innerMap
for (Iterator<Entry<Object, EqualBeans>> it = _innerMap.entrySet().iterator(); it.hasNext();) {
final Entry<Object, EqualBeans> entry = it.next();
final EqualBeans beans = entry.getValue();
if (equalBeans.equals(beans)) { //found
found = true;
continue;
}
newMap.put(entry.getKey(), entry.getValue());
}
if (found) {
_innerMap = newMap;
removeFromEqualBeansAndReput(equalBeans, bean); //remove from EqualBeans
}
}
}
}
private void removeFromEqualBeansAndReput(EqualBeans equalBeans, Object bean) {
final Object proxy = equalBeans.remove(bean);
if (!equalBeans.isEmpty()) {
_innerMap.put(proxy, equalBeans); //reput into _innerMap with new Proxy
}
}
public Set<Object> getEqualBeans(Object bean) {
boolean doSync = false;
EqualBeans equalBeans;
if (bean instanceof Collection) {
equalBeans = _identityMap.get(bean);
EqualBeans innerBean = _innerMap.get(bean);
if (equalBeans == null) {
equalBeans = innerBean;
} else if (innerBean == null) {
_identityMap.remove(bean);
doSync = true;
}
} else {
equalBeans = _innerMap.get(bean);
if (equalBeans == null) { //hashcode might changed
equalBeans = _identityMap.remove(bean);
if (equalBeans != null) { //hashcode is changed
doSync = true;
}
}
}
if (doSync) {
syncInnerMap(equalBeans, bean);
put(bean);
equalBeans = _identityMap.get(bean);
}
return equalBeans == null ? Collections.emptySet() : equalBeans.getBeans();
}
public int size() {
return _innerMap.size();
}
private Set<Entry<Object, EqualBeans>> entrySet() {
return _innerMap.entrySet();
}
}
private static class EqualBeans {
private transient WeakReference<Object> _proxy; //surrogate object as the key for the _beanSet
private transient WeakIdentityMap<Object, Boolean> _beanSet; //different instance of beans equal to each other
public EqualBeans(Object proxy) {
_proxy = new WeakReference<Object>(proxy);
_beanSet = new WeakIdentityMap<Object, Boolean>(2);
_beanSet.put(proxy, Boolean.TRUE);
}
public void put(Object value) {
_beanSet.put(value, Boolean.TRUE);
}
public Set<Object> getBeans() {
return _beanSet != null ? new IdentityHashSet<Object>(_beanSet.keySet()) : Collections.emptySet();
}
//return proxy bean(could be migrated or not)
public Object remove(Object value) {
_beanSet.remove(value);
if (_beanSet.isEmpty()) {
_beanSet = null;
} else if (System.identityHashCode(_proxy.get()) == System.identityHashCode(value)) {
//proxy deleted, must migrate proxy
for (final Iterator<Object> it = _beanSet.keySet().iterator(); it.hasNext();) {
final Object obj = it.next();
if (obj != null) {
_proxy = new WeakReference<Object>(obj); //migrate
break;
} else {
it.remove();
}
}
}
return _proxy.get();
}
public boolean isEmpty() {
return _beanSet == null || _beanSet.isEmpty();
}
}
//------ debug dump ------//
public void dumpLess() {
dumpCompMap(false);
dumpBeanMap(false);
dumpNullMap(false);
dumpEqualBeansMap();
}
public void dump() {
dumpCompMap(true);
dumpBeanMap(true);
dumpNullMap(true);
dumpEqualBeansMap();
}
private void dumpBeanMap(boolean dumpNodes) {
System.out.println("******* _beanMap: *********");
System.out.println("******* size: " + _beanMap.size());
for (Object bean : _beanMap.keySet()) {
System.out.println("bean:" + bean + "------------");
if (dumpNodes) {
Set<TrackerNode> nodes = _beanMap.get(bean);
if (nodes != null) {
for (TrackerNode node : nodes) {
dumpNodeTree(node, 4);
}
} else {
System.out.println("NO TrackerNode bound to this bean.");
}
}
}
}
private void dumpCompMap(boolean dumpNodes) {
System.out.println("******* _compMap: *********");
System.out.println("******* size: " + _compMap.size());
for (Component comp : _compMap.keySet()) {
System.out.println("comp:" + comp + "------------");
if (dumpNodes) {
Map<Object, TrackerNode> nodes = _compMap.get(comp);
for (Entry<Object, TrackerNode> entry : nodes.entrySet()) {
System.out.println("----field:" + entry.getKey() + "");
dumpNodeTree(entry.getValue(), 4);
}
}
}
}
private void dumpNullMap(boolean dumpNodes) {
System.out.println("******* _nullMap: *********");
System.out.println("******* size: " + _nullMap.size());
for (Object field : _nullMap.keySet()) {
System.out.println("field:" + field + "------");
if (dumpNodes) {
Set<TrackerNode> nodes = _nullMap.get(field);
for (TrackerNode node : nodes) {
dumpNodeTree(node, 4);
}
}
}
}
private void dumpEqualBeansMap() {
System.out.println("******* _equalBeansMap: *********");
System.out.println("******* size: " + _equalBeansMap.size());
for (Entry<Object, EqualBeans> entry : _equalBeansMap.entrySet()) {
System.out.print("proxy:[" + entry.getKey());
System.out.print("], val:[" + entry.getValue().getBeans());
System.out.println("]----");
}
}
private void dumpNodeTree(TrackerNode node, int indent) {
dumpNode(node, indent);
for (TrackerNode kid : node.getDirectDependents()) {
dumpNodeTree(kid, indent + 4);
}
}
private void dumpNode(TrackerNode node, int spaces) {
System.out.println(dumpSpace(spaces) + node.getFieldScript() + ":" + node.getBean());
dumpBindings(node, spaces);
dumpPropNameMapping(node, spaces);
dumpAssociate(node, spaces);
}
private void dumpNode0(TrackerNode node, int spaces) {
System.out.println(dumpSpace(spaces) + node.getFieldScript() + ":" + node.getBean());
dumpBindings(node, spaces);
dumpPropNameMapping(node, spaces);
}
private void dumpAssociate(TrackerNode node, int spaces) {
if (node.getAssociates().isEmpty())
return; //don't dump if empty
System.out.println(dumpSpace(spaces) + "[dependents:");
for (TrackerNode dependent : node.getAssociates()) {
dumpNode0(dependent, spaces + 4); //avoid recursive
}
System.out.println(dumpSpace(spaces) + "]");
}
private void dumpBindings(TrackerNode node, int spaces) {
if (node.getBindings().isEmpty())
return; //don't dump if empty
System.out.println(dumpSpace(spaces) + "[bindings:");
for (Binding binding : node.getBindings()) {
dumpBinding(binding, spaces + 4);
}
System.out.println(dumpSpace(spaces) + "]");
}
private void dumpBinding(Binding binding, int spaces) {
if (binding instanceof PropertyBinding) {
System.out.println(dumpSpace(spaces) + ((PropertyBinding) binding).getPropertyString() + ":" + binding);
} else if (binding instanceof FormBinding) {
System.out.println(dumpSpace(spaces) + ((FormBinding) binding).getPropertyString() + ":" + binding);
} else if (binding instanceof ChildrenBinding) {
System.out.println(dumpSpace(spaces) + ((ChildrenBinding) binding).getPropertyString() + ":" + binding);
} else if (binding instanceof ReferenceBinding) {
System.out.println(dumpSpace(spaces) + ((ReferenceBinding) binding).getPropertyString() + ":" + binding);
} else {
System.out.println(dumpSpace(spaces) + ":" + binding);
}
}
private void dumpPropNameMapping(TrackerNode node, int spaces) {
if (node.getPropNameMapping().size() == 0)
return; //don't dump if empty
System.out.println(dumpSpace(spaces) + "[propertys:");
for (Entry<Object, ?> entry : node.getPropNameMapping().entrySet()) {
dumpEntry(entry, spaces + 4);
}
System.out.println(dumpSpace(spaces) + "]");
}
private void dumpEntry(Entry<Object, ?> entry, int spaces) {
System.out.println(dumpSpace(spaces) + entry.getKey() + "=" + entry.getValue());
}
private String dumpSpace(int space) {
char[] spaces = new char[space];
Arrays.fill(spaces, ' ');
return new String(spaces);
}
}