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

Also see the following revisions:

    ------------------------------------------------------------------------
    r471189 | scolebourne | 2006-11-04 05:57:57 -0800 (Sat, 04 Nov 2006) | 1 line
    
    Remove getMap(), getOrderedMap() and getSortedMap() - use decorated()
    ------------------------------------------------------------------------
    r468685 | scolebourne | 2006-10-28 05:30:27 -0700 (Sat, 28 Oct 2006) | 1 line
    
    COLLECTIONS-228 - MultiValueMap put and putAll do not return the correct values
    ------------------------------------------------------------------------


git-svn-id: https://svn.apache.org/repos/asf/commons/proper/collections/trunk@815081 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Henri Yandell 2009-09-15 05:56:12 +00:00
parent 484bfbe255
commit fd3dc7c7dd
1 changed files with 74 additions and 72 deletions
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146
src/java/org/apache/commons/collections/map/MultiValueMap.java
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@ -29,6 +29,7 @@ import java.util.Iterator;
import java.util.Map;
import java.util.Set;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.Factory;
import org.apache.commons.collections.FunctorException;
import org.apache.commons.collections.MultiMap;
@ -66,15 +67,15 @@ import org.apache.commons.collections.iterators.IteratorChain;
* @version $Revision$ $Date$
* @since Commons Collections 3.2
*/
public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Serializable {
public class MultiValueMap<K, V> extends AbstractMapDecorator<K, Object> implements MultiMap<K, V>, Serializable {
/** Serialization version */
private static final long serialVersionUID = -2214159910087182007L;
/** The factory for creating value collections. */
private final Factory collectionFactory;
private final Factory<? extends Collection<V>> collectionFactory;
/** The cached values. */
private transient Collection valuesView;
private transient Collection<V> valuesView;
/**
* Creates a map which wraps the given map and
@ -82,8 +83,9 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
*
* @param map the map to wrap
*/
public static MultiValueMap decorate(Map map) {
return new MultiValueMap(map, new ReflectionFactory(ArrayList.class));
@SuppressWarnings("unchecked")
public static <K, V> MultiValueMap<K, V> decorate(Map<K, ? super Collection<V>> map) {
return MultiValueMap.<K, V, ArrayList>decorate((Map<K, ? super Collection>) map, ArrayList.class);
}
/**
@ -93,8 +95,8 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param map the map to wrap
* @param collectionClass the type of the collection class
*/
public static MultiValueMap decorate(Map map, Class collectionClass) {
return new MultiValueMap(map, new ReflectionFactory(collectionClass));
public static <K, V, C extends Collection<V>> MultiValueMap<K, V> decorate(Map<K, ? super C> map, Class<C> collectionClass) {
return new MultiValueMap<K, V>(map, new ReflectionFactory<C>(collectionClass));
}
/**
@ -104,8 +106,8 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param map the map to decorate
* @param collectionFactory the collection factory (must return a Collection object).
*/
public static MultiValueMap decorate(Map map, Factory collectionFactory) {
return new MultiValueMap(map, collectionFactory);
public static <K, V, C extends Collection<V>> MultiValueMap<K, V> decorate(Map<K, ? super C> map, Factory<C> collectionFactory) {
return new MultiValueMap<K, V>(map, collectionFactory);
}
//-----------------------------------------------------------------------
@ -113,6 +115,7 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* Creates a MultiValueMap based on a <code>HashMap</code> and
* storing the multiple values in an <code>ArrayList</code>.
*/
@SuppressWarnings("unchecked")
public MultiValueMap() {
this(new HashMap(), new ReflectionFactory(ArrayList.class));
}
@ -124,8 +127,9 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param map the map to decorate
* @param collectionFactory the collection factory which must return a Collection instance
*/
protected MultiValueMap(Map map, Factory collectionFactory) {
super(map);
@SuppressWarnings("unchecked")
protected <C extends Collection<V>> MultiValueMap(Map<K, ? super C> map, Factory<C> collectionFactory) {
super((Map<K, Object>) map);
if (collectionFactory == null) {
throw new IllegalArgumentException("The factory must not be null");
}
@ -171,7 +175,7 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
// Collection coll = (Collection) keyValuePair.getValue();
// coll.clear();
// }
getMap().clear();
decorated().clear();
}
/**
@ -187,8 +191,9 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param value the value to remove
* @return the value removed (which was passed in), null if nothing removed
*/
public Object remove(Object key, Object value) {
Collection valuesForKey = getCollection(key);
@SuppressWarnings("unchecked")
public V remove(Object key, Object value) {
Collection<V> valuesForKey = getCollection(key);
if (valuesForKey == null) {
return null;
}
@ -199,7 +204,7 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
if (valuesForKey.isEmpty()) {
remove(key);
}
return value;
return (V) value;
}
/**
@ -210,17 +215,14 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param value the value to search for
* @return true if the map contains the value
*/
@SuppressWarnings("unchecked")
public boolean containsValue(Object value) {
Set pairs = getMap().entrySet();
if (pairs == null) {
return false;
}
Iterator pairsIterator = pairs.iterator();
while (pairsIterator.hasNext()) {
Map.Entry keyValuePair = (Map.Entry) pairsIterator.next();
Collection coll = (Collection) keyValuePair.getValue();
if (coll.contains(value)) {
return true;
Set<Map.Entry<K, Object>> pairs = decorated().entrySet();
if (pairs != null) {
for (Map.Entry<K, Object> entry : pairs) {
if (((Collection<V>) entry.getValue()).contains(value)) {
return true;
}
}
}
return false;
@ -236,19 +238,20 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param value the value to add to the collection at the key
* @return the value added if the map changed and null if the map did not change
*/
public Object put(Object key, Object value) {
@SuppressWarnings("unchecked")
public Object put(K key, Object value) {
boolean result = false;
Collection coll = getCollection(key);
Collection<V> coll = getCollection(key);
if (coll == null) {
coll = createCollection(1); // might produce a non-empty collection
coll.add(value);
coll.add((V) value);
if (coll.size() > 0) {
// only add if non-zero size to maintain class state
getMap().put(key, coll);
decorated().put(key, coll);
result = true; // map definitely changed
}
} else {
result = coll.add(value);
result = coll.add((V) value);
}
return (result ? value : null);
}
@ -264,17 +267,15 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
*
* @param map the map to copy (either a normal or multi map)
*/
public void putAll(Map map) {
@SuppressWarnings("unchecked")
public void putAll(Map<? extends K, ?> map) {
if (map instanceof MultiMap) {
for (Iterator it = map.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
Collection coll = (Collection) entry.getValue();
putAll(entry.getKey(), coll);
for (Map.Entry<? extends K, Object> entry : ((MultiMap<? extends K, V>) map).entrySet()) {
putAll(entry.getKey(), (Collection<V>) entry.getValue());
}
} else {
for (Iterator it = map.entrySet().iterator(); it.hasNext();) {
Map.Entry entry = (Map.Entry) it.next();
put(entry.getKey(), entry.getValue());
for (Map.Entry<? extends K, ?> entry : map.entrySet()) {
put(entry.getKey(), (V) entry.getValue());
}
}
}
@ -286,11 +287,10 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
*
* @return a collection view of the values contained in this map
*/
public Collection values() {
if (valuesView == null) {
valuesView = new Values();
}
return valuesView;
@SuppressWarnings("unchecked")
public Collection<Object> values() {
Collection<V> vs = valuesView;
return (Collection<Object>) (vs != null ? vs : (valuesView = new Values()));
}
/**
@ -300,7 +300,7 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @return true if the map contains the value
*/
public boolean containsValue(Object key, Object value) {
Collection coll = getCollection(key);
Collection<V> coll = getCollection(key);
if (coll == null) {
return false;
}
@ -314,8 +314,9 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param key the key to retrieve
* @return the collection mapped to the key, null if no mapping
*/
public Collection getCollection(Object key) {
return (Collection) getMap().get(key);
@SuppressWarnings("unchecked")
public Collection<V> getCollection(Object key) {
return (Collection<V>) decorated().get(key);
}
/**
@ -325,7 +326,7 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @return the size of the collection at the key, zero if key not in map
*/
public int size(Object key) {
Collection coll = getCollection(key);
Collection<V> coll = getCollection(key);
if (coll == null) {
return 0;
}
@ -340,18 +341,18 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param values the values to add to the collection at the key, null ignored
* @return true if this map changed
*/
public boolean putAll(Object key, Collection values) {
public boolean putAll(K key, Collection<V> values) {
if (values == null || values.size() == 0) {
return false;
}
boolean result = false;
Collection coll = getCollection(key);
Collection<V> coll = getCollection(key);
if (coll == null) {
coll = createCollection(values.size()); // might produce a non-empty collection
coll.addAll(values);
if (coll.size() > 0) {
// only add if non-zero size to maintain class state
getMap().put(key, coll);
decorated().put(key, coll);
result = true; // map definitely changed
}
} else {
@ -366,12 +367,11 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param key the key to get an iterator for
* @return the iterator of the collection at the key, empty iterator if key not in map
*/
public Iterator iterator(Object key) {
public Iterator<V> iterator(Object key) {
if (!containsKey(key)) {
return EmptyIterator.INSTANCE;
} else {
return new ValuesIterator(key);
return EmptyIterator.<V>getInstance();
}
return new ValuesIterator(key);
}
/**
@ -381,10 +381,8 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
*/
public int totalSize() {
int total = 0;
Collection values = getMap().values();
for (Iterator it = values.iterator(); it.hasNext();) {
Collection coll = (Collection) it.next();
total += coll.size();
for (Object v : decorated().values()) {
total += CollectionUtils.size(v);
}
return total;
}
@ -399,18 +397,18 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
* @param size the collection size that is about to be added
* @return the new collection
*/
protected Collection createCollection(int size) {
return (Collection) collectionFactory.create();
protected Collection<V> createCollection(int size) {
return collectionFactory.create();
}
//-----------------------------------------------------------------------
/**
* Inner class that provides the values view.
*/
private class Values extends AbstractCollection {
public Iterator iterator() {
final IteratorChain chain = new IteratorChain();
for (Iterator it = keySet().iterator(); it.hasNext();) {
private class Values extends AbstractCollection<V> {
public Iterator<V> iterator() {
final IteratorChain<V> chain = new IteratorChain<V>();
for (Iterator<K> it = keySet().iterator(); it.hasNext();) {
chain.addIterator(new ValuesIterator(it.next()));
}
return chain;
@ -428,10 +426,10 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
/**
* Inner class that provides the values iterator.
*/
private class ValuesIterator implements Iterator {
private class ValuesIterator implements Iterator<V> {
private final Object key;
private final Collection values;
private final Iterator iterator;
private final Collection<V> values;
private final Iterator<V> iterator;
public ValuesIterator(Object key) {
this.key = key;
@ -450,7 +448,7 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
return iterator.hasNext();
}
public Object next() {
public V next() {
return iterator.next();
}
}
@ -458,14 +456,18 @@ public class MultiValueMap extends AbstractMapDecorator implements MultiMap, Ser
/**
* Inner class that provides a simple reflection factory.
*/
private static class ReflectionFactory implements Factory, Serializable {
private final Class clazz;
private static class ReflectionFactory<T extends Collection<?>> implements Factory<T>, Serializable {
public ReflectionFactory(Class clazz) {
/** Serialization version */
private static final long serialVersionUID = 2986114157496788874L;
private final Class<T> clazz;
public ReflectionFactory(Class<T> clazz) {
this.clazz = clazz;
}
public Object create() {
public T create() {
try {
return clazz.newInstance();
} catch (Exception ex) {