Merging from -r468106:814127 of collections_jdk5_branch - namely where this code was generified; mostly in r738956.

Also see the following revisions:

    ------------------------------------------------------------------------
    r471575 | scolebourne | 2006-11-05 15:58:08 -0800 (Sun, 05 Nov 2006) | 1 line
    
    Generify and remove AbstractSerializableCollectionDecorator
    ------------------------------------------------------------------------
    r471202 | scolebourne | 2006-11-04 06:21:44 -0800 (Sat, 04 Nov 2006) | 1 line
    
    Remove getCollection() - use covariant decorated()
    ------------------------------------------------------------------------


git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@815037 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Henri Yandell 2009-09-15 05:54:45 +00:00
parent 4e30197607
commit c0aa4fdd16
1 changed files with 17 additions and 16 deletions

View File

@ -17,7 +17,6 @@
package org.apache.commons.collections.collection;
import java.util.Collection;
import java.util.Iterator;
import org.apache.commons.collections.Predicate;
@ -34,19 +33,20 @@ import org.apache.commons.collections.Predicate;
* <p>
* This class is Serializable from Commons Collections 3.1.
*
* @param <E> the type of the elements in the collection
* @since Commons Collections 3.0
* @version $Revision$ $Date$
*
* @author Stephen Colebourne
* @author Paul Jack
*/
public class PredicatedCollection extends AbstractSerializableCollectionDecorator {
public class PredicatedCollection<E> extends AbstractCollectionDecorator<E> {
/** Serialization version */
private static final long serialVersionUID = -5259182142076705162L;
/** The predicate to use */
protected final Predicate predicate;
protected final Predicate<? super E> predicate;
/**
* Factory method to create a predicated (validating) collection.
@ -54,16 +54,17 @@ public class PredicatedCollection extends AbstractSerializableCollectionDecorato
* If there are any elements already in the collection being decorated, they
* are validated.
*
* @param <T> the type of the elements in the collection
* @param coll the collection to decorate, must not be null
* @param predicate the predicate to use for validation, must not be null
* @return a new predicated collection
* @throws IllegalArgumentException if collection or predicate is null
* @throws IllegalArgumentException if the collection contains invalid elements
*/
public static Collection decorate(Collection coll, Predicate predicate) {
return new PredicatedCollection(coll, predicate);
public static <T> Collection<T> decorate(Collection<T> coll, Predicate<? super T> predicate) {
return new PredicatedCollection<T>(coll, predicate);
}
//-----------------------------------------------------------------------
/**
* Constructor that wraps (not copies).
@ -76,14 +77,14 @@ public class PredicatedCollection extends AbstractSerializableCollectionDecorato
* @throws IllegalArgumentException if collection or predicate is null
* @throws IllegalArgumentException if the collection contains invalid elements
*/
protected PredicatedCollection(Collection coll, Predicate predicate) {
protected PredicatedCollection(Collection<E> coll, Predicate<? super E> predicate) {
super(coll);
if (predicate == null) {
throw new IllegalArgumentException("Predicate must not be null");
}
this.predicate = predicate;
for (Iterator it = coll.iterator(); it.hasNext(); ) {
validate(it.next());
for (E item : coll) {
validate(item);
}
}
@ -96,7 +97,7 @@ public class PredicatedCollection extends AbstractSerializableCollectionDecorato
* @param object the object being added
* @throws IllegalArgumentException if the add is invalid
*/
protected void validate(Object object) {
protected void validate(E object) {
if (predicate.evaluate(object) == false) {
throw new IllegalArgumentException("Cannot add Object '" + object + "' - Predicate '" + predicate + "' rejected it");
}
@ -111,9 +112,9 @@ public class PredicatedCollection extends AbstractSerializableCollectionDecorato
* @return the result of adding to the underlying collection
* @throws IllegalArgumentException if the add is invalid
*/
public boolean add(Object object) {
public boolean add(E object) {
validate(object);
return getCollection().add(object);
return decorated().add(object);
}
/**
@ -125,11 +126,11 @@ public class PredicatedCollection extends AbstractSerializableCollectionDecorato
* @return the result of adding to the underlying collection
* @throws IllegalArgumentException if the add is invalid
*/
public boolean addAll(Collection coll) {
for (Iterator it = coll.iterator(); it.hasNext(); ) {
validate(it.next());
public boolean addAll(Collection<? extends E> coll) {
for (E item : coll) {
validate(item);
}
return getCollection().addAll(coll);
return decorated().addAll(coll);
}
}