Glassfish example source code file (Vector.java)
The Glassfish Vector.java source code/*
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/*
* sco.Vector.java
*/
package com.sun.jdo.spi.persistence.support.sqlstore.sco;
import java.util.Collection;
import java.util.Iterator;
import java.util.ResourceBundle;
import com.sun.jdo.api.persistence.support.JDOUserException;
import com.sun.jdo.api.persistence.support.JDOUnsupportedOptionException;
import com.sun.jdo.spi.persistence.support.sqlstore.PersistenceCapable;
import com.sun.jdo.spi.persistence.support.sqlstore.StateManager;
import com.sun.jdo.spi.persistence.support.sqlstore.SCOCollection;
import org.glassfish.persistence.common.I18NHelper;
/**
* A mutable 2nd class object date.
* @author Marina Vatkina
* @version 1.0
* @see java.util.Vector
*/
public class Vector
extends java.util.Vector
implements SCOCollection
{
private transient PersistenceCapable owner;
private transient String fieldName;
private transient Class elementType;
private transient boolean allowNulls;
private transient java.util.Vector added = new java.util.Vector();
private transient java.util.Vector removed = new java.util.Vector();
/**
* I18N message handler
*/
private final static ResourceBundle messages = I18NHelper.loadBundle(
"com.sun.jdo.spi.persistence.support.sqlstore.impl.Bundle", // NOI18N
Vector.class.getClassLoader());
private final static ResourceBundle messages1 = I18NHelper.loadBundle(
"com.sun.jdo.spi.persistence.support.sqlstore.Bundle", // NOI18N
Vector.class.getClassLoader());
/**
* Constructs an empty vector so that its internal data array
* has size <tt>10 and its standard capacity increment is
* zero. Assigns owning object and field name
* @param owner the owning object
* @param fieldName the owning field name
* @param elementType the element types allowed
* @param allowNulls true if nulls are allowed
*/
public Vector(Object owner, String fieldName, Class elementType, boolean allowNulls)
{
super();
if (owner instanceof PersistenceCapable)
{
this.owner = (PersistenceCapable)owner;
this.fieldName = fieldName;
}
this.elementType = elementType;
this.allowNulls = allowNulls;
}
/**
* Constructs an empty vector with the specified initial capacity and
* with its capacity increment equal to zero. Assigns owning object and field name
*
* @param owner the owning object
* @param fieldName the owning field name
* @param elementType the element types allowed
* @param allowNulls true if nulls are allowed
* @param initialCapacity the initial capacity of the vector.
* @exception IllegalArgumentException if the specified initial capacity
* is negative
*/
public Vector(Object owner, String fieldName,
Class elementType, boolean allowNulls, int initialCapacity)
{
super(initialCapacity);
if (owner instanceof PersistenceCapable)
{
this.owner = (PersistenceCapable)owner;
this.fieldName = fieldName;
}
this.elementType = elementType;
this.allowNulls = allowNulls;
}
/** ------------------Public Methods----------------*/
/**
* Sets the component at the specified <code>index of this
* vector to be the specified object. The previous component at that
* position is discarded.<p>
*
* @param obj what the component is to be set to.
* @param index the specified index.
* @exception ArrayIndexOutOfBoundsException if the index was invalid.
* @see java.util.Vector
*/
public synchronized void setElementAt(Object obj, int index) {
throwUnsupportedOption();
if (obj == null)
{
if (allowNulls == false)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
// It is actualy remove
this.removeElementAt(index);
}
if (elementType == null || elementType.isAssignableFrom(obj.getClass()))
{
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
Object o = super.elementAt(index);
super.setElementAt(obj, index);
if (added.remove(o) == false)
removed.add(o);
if (removed.remove(obj) == false)
added.add(obj);
// Apply updates
this.applyUpdates(stateManager, true);
} else {
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), new Object[] {obj});
}
}
/**
* Deletes the component at the specified index.
*
* @param index the index of the object to remove.
* @exception ArrayIndexOutOfBoundsException if the index was invalid.
* @see java.util.Vector
*/
public synchronized void removeElementAt(int index) {
throwUnsupportedOption();
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
Object obj = super.elementAt(index);
super.removeElementAt(index);
if (added.remove(obj) == false)
removed.add(obj);
// Apply updates
this.applyUpdates(stateManager, true);
}
/**
* Inserts the specified object as a component in this vector at the
* specified <code>index.
*
* @param obj the component to insert.
* @param index where to insert the new component.
* @exception ArrayIndexOutOfBoundsException if the index was invalid.
* @see java.util.Vector
*/
public synchronized void insertElementAt(Object obj, int index) {
if (allowNulls == false && obj == null)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
if (elementType == null || elementType.isAssignableFrom(obj.getClass()))
{
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
super.insertElementAt(obj, index);
if (removed.remove(obj) == false)
added.add(obj);
// Apply updates
this.applyUpdates(stateManager, true);
} else {
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), new Object[] {obj});
}
}
/**
* Adds the specified component to the end of this vector,
* increasing its size by one.
*
* @param obj the component to be added.
* @see java.util.Vector
*/
public synchronized void addElement(Object obj) {
if (allowNulls == false && obj == null)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
if (elementType == null || elementType.isAssignableFrom(obj.getClass()))
{
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
super.addElement(obj);
if (removed.remove(obj) == false)
added.add(obj);
// Apply updates
this.applyUpdates(stateManager, true);
} else {
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), new Object[] {obj});
}
}
/**
* Removes the first (lowest-indexed) occurrence of the argument
* from this vector.
*
* @param obj the component to be removed.
* @return <code>true if the argument was a component of this
* vector; <code>false otherwise.
* @see java.util.Vector
*/
public synchronized boolean removeElement(Object obj) {
// Because java.util.Vector.removeElement(Object) calls internally removeElementAt(int)
// which is not supported, we cannot rely on jdk. We need to process remove here.
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
int i = super.indexOf(obj);
if (i > -1) {
super.removeElementAt(i);
if (added.remove(obj) == false)
removed.add(obj);
// Apply updates
this.applyUpdates(stateManager, true);
return true;
}
return false;
}
/**
* Removes all components from this vector and sets its size to zero.<p>
*
* @see java.util.Vector
*/
public synchronized void removeAllElements() {
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
for (Iterator iter = super.iterator(); iter.hasNext();) {
Object o = iter.next();
if (added.remove(o) == false)
removed.add(o);
}
added.clear();
super.removeAllElements();
// Apply updates
this.applyUpdates(stateManager, true);
}
/**
* Replaces the element at the specified position in this Vector with the
* specified element.
*
* @param index index of element to replace.
* @param element element to be stored at the specified position.
* @return the element previously at the specified position.
* @exception ArrayIndexOutOfBoundsException index out of range
* (index < 0 || index >= size()).
* @exception IllegalArgumentException fromIndex > toIndex.
* @see java.util.Vector
*/
public synchronized Object set(int index, Object element) {
throwUnsupportedOption();
if (element == null)
{
if (allowNulls == false)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
// It is actualy remove
return this.remove(index);
}
if (elementType == null || elementType.isAssignableFrom(element.getClass()))
{
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
Object o = super.set(index, element);
if (added.remove(o) == false)
removed.add(o);
if (removed.remove(element) == false)
added.add(element);
// Apply updates
this.applyUpdates(stateManager, true);
return o;
} else {
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), new Object[] {element});
}
}
/**
* Appends the specified element to the end of this Vector.
*
* @param o element to be appended to this Vector.
* @return true (as per the general contract of Collection.add).
* @see java.util.Vector
*/
public synchronized boolean add(Object o) {
if (allowNulls == false && o == null)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
if (elementType == null || elementType.isAssignableFrom(o.getClass()))
{
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
if (removed.remove(o) == false)
added.add(o);
boolean modified = super.add(o);
// Apply updates
this.applyUpdates(stateManager, modified);
return modified;
} else {
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), new Object[] {o});
}
}
/**
* Removes the first occurrence of the specified element in this Vector
* If the Vector does not contain the element, it is unchanged.
*
* @param o element to be removed from this Vector, if present.
* @return true if the Vector contained the specified element.
* @see java.util.Vector
*/
public boolean remove(Object o) {
return this.removeElement(o);
}
/**
* Inserts the specified element at the specified position in this Vector.
*
* @param index index at which the specified element is to be inserted.
* @param element element to be inserted.
* @exception ArrayIndexOutOfBoundsException index is out of range
* (index < 0 || index > size()).
* @see java.util.Vector
*/
public void add(int index, Object element) {
this.insertElementAt(element, index);
}
/**
* Removes the element at the specified position in this Vector.
* shifts any subsequent elements to the left (subtracts one from their
* indices). Returns the element that was removed from the Vector.
*
* @param index the index of the element to removed.
* @exception ArrayIndexOutOfBoundsException index out of range (index
* < 0 || index >= size()).
* @see java.util.Vector
*/
public synchronized Object remove(int index) {
throwUnsupportedOption();
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
Object obj = super.remove(index);
if (added.remove(obj) == false)
removed.add(obj);
// Apply updates
this.applyUpdates(stateManager, true);
return obj;
}
/**
* Removes all of the elements from this Vector. The Vector will
* be empty after this call returns (unless it throws an exception).
*
* @see java.util.Vector
*/
public void clear() {
this.removeAllElements();
}
/**
* Appends all of the elements in the specified Collection to the end of
* this Vector, in the order that they are returned by the specified
* Collection's Iterator.
*
* @param c elements to be inserted into this Vector.
* @see java.util.Vector
*/
public synchronized boolean addAll(Collection c) {
if (allowNulls == false && c.contains(null))
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
java.util.Vector errc = new java.util.Vector();
if (elementType != null)
{
// iterate the collection and make a list of wrong elements.
Iterator i = c.iterator();
while (i.hasNext())
{
Object o = i.next();
if (!elementType.isAssignableFrom(o.getClass()))
errc.add(o);
}
}
if (errc != null && errc.size() > 0)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), errc.toArray());
}
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
removed.removeAll(c);
added.addAll(c);
boolean modified = super.addAll(c);
// Apply updates
this.applyUpdates(stateManager, modified);
return modified;
}
/**
* Removes from this Vector all of its elements that are contained in the
* specified Collection.
*
* @return true if this Vector changed as a result of the call.
* @see java.util.Vector
*/
public synchronized boolean removeAll(Collection c) {
boolean modified = false;
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
Iterator e = c.iterator();
while (e.hasNext()) {
Object o = e.next();
if(super.contains(o)) {
removeInternal(o);
if (added.remove(o) == false)
removed.add(o);
modified = true;
}
}
// Apply updates
this.applyUpdates(stateManager, modified);
return modified;
}
/**
* Inserts all of the elements in in the specified Collection into this
* Vector at the specified position. Shifts the element currently at
* that position (if any) and any subsequent elements to the right
* (increases their indices). The new elements will appear in the Vector
* in the order that they are returned by the specified Collection's
* iterator.
*
* @param index index at which to insert first element
* from the specified collection.
* @param c elements to be inserted into this Vector.
* @exception ArrayIndexOutOfBoundsException index out of range (index
* < 0 || index > size()).
* @see java.util.Vector
*/
public synchronized boolean addAll(int index, Collection c) {
if (allowNulls == false && c.contains(null))
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.nulls_not_allowed")); // NOI18N
}
java.util.Vector errc = new java.util.Vector();
if (elementType != null)
{
// iterate the collection and make a list of wrong elements.
Iterator i = c.iterator();
while (i.hasNext())
{
Object o = i.next();
if (!elementType.isAssignableFrom(o.getClass()))
errc.add(o);
}
}
if (errc != null && errc.size() > 0)
{
throw new JDOUserException(I18NHelper.getMessage(messages,
"sco.classcastexception", elementType.getName()), // NOI18N
new ClassCastException(), errc.toArray());
}
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
removed.removeAll(c);
added.addAll(c);
boolean modified = super.addAll(index, c);
// Apply updates
this.applyUpdates(stateManager, modified);
return modified;
}
/**
* Retains only the elements in this Vector that are contained in the
* specified Collection.
*
* @return true if this Vector changed as a result of the call.
* @see java.util.Vector
*/
public synchronized boolean retainAll(Collection c) {
boolean modified = false;
java.util.Vector v = new java.util.Vector();
// Mark the field as dirty
StateManager stateManager = this.makeDirty();
for (Iterator iter = super.iterator(); iter.hasNext();)
{
Object o = iter.next();
if (!c.contains(o))
{
v.add(o);
if (added.remove(o) == false)
removed.add(o);
modified = true;
}
}
// Now remove the rest (stored in "v")
for (Iterator iter = v.iterator(); iter.hasNext();)
{
removeInternal(iter.next());
}
// Apply updates
this.applyUpdates(stateManager, modified);
return modified;
}
/**
* Creates and returns a copy of this object.
*
* <P>Mutable Second Class Objects are required to provide a public
* clone method in order to allow for copying PersistenceCapable
* objects. In contrast to Object.clone(), this method must not throw a
* CloneNotSupportedException.
*/
public Object clone()
{
Vector obj = (Vector)super.clone();
obj.unsetOwner();
return obj;
}
/**
* Creates and returns a copy of this object without resetting the owner and field value.
*
*/
public Object cloneInternal()
{
return super.clone();
}
/**
* Cleans removed and added lists
*/
public void reset()
{
added.clear();
removed.clear();
}
public void markDeferred()
{
}
public boolean isDeferred()
{
return false;
}
public void applyDeferredUpdates(Collection c)
{
super.addAll(c);
}
/**
* Adds an object to the list without recording changes
*/
public void addInternal(Object o)
{
super.addElement(o);
}
/**
* Adds a Collection to the list without recording changes
*/
public void addAllInternal(Collection c)
{
super.addAll(c);
}
/**
* @inheritDoc
*/
public void addToBaseCollection(Object o)
{
super.add(o);
}
/**
* Removes from this collection without recording changes
*/
public void removeAllInternal(Collection c)
{
super.removeAll(c);
}
/**
* Returns added collection
*
* @return added collection of added elements
*/
public Collection getAdded()
{
return (Collection)added;
}
/**
* Returns removed collection
*
* @return removed collection of removed elements
*/
public Collection getRemoved()
{
return (Collection)removed;
}
/**
* Clears Collection without notifing the owner
*/
public void clearInternal()
{
//Cannot call super.clear() as it internally calls removeAllElements()
// which causes marking field as dirty.
int s = super.size() - 1;
// Need to loop backwards to avoid resetting size of the collection
for (int i = s; i > -1; i--)
{
super.removeElementAt(i);
}
this.reset();
}
/**
* Removes an element without notifing the owner
*/
public void removeInternal(Object o)
{
int i = super.indexOf(o);
super.remove(i);
}
/**
* Nullifies references to the owner Object and Field
*/
public void unsetOwner()
{
this.owner = null;
this.fieldName = null;
this.elementType = null;
added.clear();
removed.clear();
}
/**
* Returns the owner object of the SCO instance
*
* @return owner object
*/
public Object getOwner()
{
return this.owner;
}
/**
* Returns the field name
*
* @return field name as java.lang.String
*/
public String getFieldName()
{
return this.fieldName;
}
/**
* Marks object dirty
*/
public StateManager makeDirty()
{
if (owner != null)
{
StateManager stateManager = owner.jdoGetStateManager();
if (stateManager != null)
{
stateManager.makeDirty(fieldName);
}
return stateManager;
}
return null;
}
/**
* Apply changes (can be a no-op)
*/
public void applyUpdates(StateManager sm, boolean modified)
{
if (modified && sm != null)
{
sm.applyUpdates(fieldName, this);
}
}
/**
* Throw JDOUnsupportedOptionException
*/
private void throwUnsupportedOption()
{
// Index operation that changes the underline collection
// is not supported in 2_beta. Bug 4370474
throw new JDOUnsupportedOptionException(I18NHelper.getMessage(messages,
"sco.not_supported")); //NOI18N
}
/**
* Set the owner if this instance is not owned.
* @see SCOCollection#setOwner
* @param owner the new owner.
* @param fieldName the new field name.
* @param elementType the new element type as Class, or null if type
* is not to be checked.
*/
public void setOwner(Object owner, String fieldName, Class elementType) {
if (this.owner != null) {
throw new JDOUserException(I18NHelper.getMessage(
messages1, "core.statemanager.anotherowner"), // NOI18N
new Object[]{this.owner, this.fieldName});
}
if (owner instanceof PersistenceCapable) {
this.owner = (PersistenceCapable)owner;
this.fieldName = fieldName;
this.elementType = elementType;
}
}
}
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