org.zkoss.bind.proxy.AbstractCollectionProxy Maven / Gradle / Ivy
/** AbstractCollectionProxy.java.
Purpose:
Description:
History:
3:01:37 PM Dec 25, 2014, Created by jumperchen
Copyright (C) 2014 Potix Corporation. All Rights Reserved.
*/
package org.zkoss.bind.proxy;
import java.io.Serializable;
import java.lang.annotation.Annotation;
import java.util.Collection;
import java.util.Iterator;
import java.util.Set;
import javassist.util.proxy.MethodHandler;
import javassist.util.proxy.Proxy;
import org.zkoss.bind.BindContext;
import org.zkoss.bind.annotation.ImmutableElements;
import org.zkoss.bind.sys.FormBinding;
import org.zkoss.bind.sys.SavePropertyBinding;
import org.zkoss.lang.Objects;
import org.zkoss.util.Pair;
/**
* This class provides a skeletal implementation of the Collection
*
* @author jumperchen
* @since 8.0.0
*/
public abstract class AbstractCollectionProxy
implements Collection, Proxy, FormProxyObject, Serializable {
private Collection _cache;
private static final long serialVersionUID = 20141225142801L;
private Object _origin;
protected boolean _dirty;
protected boolean isImmutableElements;
//ZK-3185: Enable form validation with reference and collection binding
private ProxyNode _node;
public AbstractCollectionProxy(Collection origin, Annotation[] callerAnnots) {
_origin = origin;
_cache = initCache();
if (callerAnnots != null) {
for (Annotation annot : callerAnnots) {
if (annot.annotationType().isAssignableFrom(ImmutableElements.class)) {
isImmutableElements = true;
break;
}
}
}
}
protected abstract Collection initCache();
@SuppressWarnings("unchecked")
protected > T getCache() {
return (T) _cache;
}
public Object getOriginObject() {
return _origin;
}
protected Object replaceOrigin(Object origin) {
Object old = _origin;
_origin = origin;
return old;
}
//F80: formProxyObject support notifyChange with Form.isDirty
public void onDirtyChange() {
ProxyHelper.callOnDirtyChange(_node);
}
public void onDataChange(Object o) {
ProxyHelper.callOnDataChange(_node, new Object[]{o, "."});
}
protected void setDirty(boolean d) {
if (_dirty != d) {
_dirty = d;
onDirtyChange();
}
if (d)
onDataChange(this);
}
public void setHandler(MethodHandler mi) {
throw new UnsupportedOperationException("Not support!");
}
public int size() {
return _cache.size();
}
public boolean isEmpty() {
return _cache.isEmpty();
}
public boolean contains(Object o) {
Iterator e = iterator();
if (o == null) {
while (e.hasNext())
if (testEquals(e.next(), null))
return true;
} else {
while (e.hasNext())
if (testEquals(o, e.next()))
return true;
}
return false;
}
public void clear() {
setDirty(true);
_cache.clear();
}
public Iterator iterator() {
return _cache.iterator();
}
public Object[] toArray() {
return _cache.toArray();
}
public T[] toArray(T[] a) {
return _cache.toArray(a);
}
public boolean add(E e) {
if (_cache.add(createProxyObject(e))) {
setDirty(true);
return true;
}
return false;
}
public boolean remove(Object o) {
if (_cache.remove(createProxyObject(o))) {
setDirty(true);
return true;
}
return false;
}
public boolean addAll(Collection c) {
boolean modified = false;
Iterator e = c.iterator();
while (e.hasNext()) {
if (add(e.next()))
modified = true;
}
if (modified)
setDirty(true);
return modified;
}
public boolean containsAll(Collection c) {
Iterator e = c.iterator();
while (e.hasNext())
if (!contains(e.next()))
return false;
return true;
}
public boolean removeAll(Collection c) {
boolean modified = false;
Iterator e = iterator();
c = createProxyObject(c); // use a proxy object to compare
while (e.hasNext()) {
if (c.contains(e.next())) {
e.remove();
modified = true;
}
}
if (modified)
setDirty(true);
return modified;
}
public boolean isFormDirty() {
if (_dirty)
return true;
Iterator e = iterator();
while (e.hasNext()) {
Object o = e.next();
if (o instanceof FormProxyObject) {
if (((FormProxyObject) o).isFormDirty())
return true;
}
}
return false;
}
public boolean retainAll(Collection c) {
boolean modified = false;
Iterator e = iterator();
c = createProxyObject(c); // use a proxy object to compare
while (e.hasNext()) {
if (!c.contains(e.next())) {
e.remove();
modified = true;
}
}
if (modified)
setDirty(true);
return modified;
}
@SuppressWarnings("unchecked")
public void resetFromOrigin() {
getCache().clear();
setDirty(false);
for (E e : (Collection) getOriginObject()) {
getCache().add(createProxyObject(e));
}
}
@SuppressWarnings("unchecked")
public void submitToOrigin(BindContext ctx) {
Collection origin = ((Collection) getOriginObject());
origin.clear();
for (E e : getCache()) {
if (e instanceof FormProxyObject) {
FormProxyObject proxy = (FormProxyObject) e;
proxy.submitToOrigin(ctx);
origin.add((E) proxy.getOriginObject());
} else {
origin.add(e);
}
}
setDirty(false);
}
protected static boolean testEquals(Object e, Object o) {
if (e == o) {
return true;
}
if (e instanceof FormProxyObject) {
Object eo = ((FormProxyObject) e).getOriginObject();
Object oo = o;
if (o instanceof FormProxyObject) {
oo = ((FormProxyObject) o).getOriginObject();
}
if (Objects.equals(eo, oo))
return true;
} else if (o instanceof FormProxyObject) {
if (Objects.equals(e, ((FormProxyObject) o).getOriginObject()))
return true;
} else {
if (Objects.equals(e, o))
return true;
}
return false;
}
public void setFormOwner(Object owner, FormBinding binding) {
throw new IllegalAccessError("Not supported");
}
protected T createProxyObject(T t) {
T p = isImmutableElements ? t : ProxyHelper.createProxyIfAny(t);
if (p instanceof FormProxyObject)
((FormProxyObject) p).setPath("[$INDEX$]", _node);
return p;
}
public void cacheSavePropertyBinding(String property, SavePropertyBinding s) {
ProxyHelper.cacheSavePropertyBinding(_node, _node.getProperty() + property, s);
}
public Set> collectCachedSavePropertyBinding() {
throw new UnsupportedOperationException("Not support!");
}
public void setPath(String property, ProxyNode parent) {
if (property == null && _node != null) { // means update
_node.setParent(parent);
} else {
_node = new ProxyNodeImpl(property, parent);
for (E e : _cache) {
if (e instanceof FormProxyObject)
((FormProxyObject) e).setPath("[$INDEX$]", _node);
}
}
}
}