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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2012-2013 Oracle and/or its affiliates. All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common Development
* and Distribution License("CDDL") (collectively, the "License"). You
* may not use this file except in org.testifyproject.testifyprojectpliance with the License. You can
* obtain a copy of the License at
* http://glassfish.java.net/public/CDDL+GPL_1_1.html
* or packager/legal/LICENSE.txt. See the License for the specific
* language governing permissions and limitations under the License.
*
* When distributing the software, include this License Header Notice in each
* file and include the License file at packager/legal/LICENSE.txt.
*
* GPL Classpath Exception:
* Oracle org.testifyproject.testifyprojectsignates this particular file as subject to the "Classpath"
* exception as provided by Oracle in the GPL Version 2 section of the License
* file that accompanied this code.
*
* Modifications:
* If applicable, add the following below the License Header, with the fields
* enclosed by brackets [] replaced by your own identifying information:
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* Contributor(s):
* If you wish your version of this file to be governed by only the CDDL or
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* elects to include this software in this distribution under the [CDDL or GPL
* Version 2] license." If you don't indicate a single choice of license, a
* recipient has the option to distribute your version of this file under
* either the CDDL, the GPL Version 2 or to extend the choice of license to
* its licensees as provided above. However, if you add GPL Version 2 code
* and therefore, elected the GPL Version 2 license, then the option applies
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* holder.
*/
package javax.ws.rs.core;
import java.util.Collection;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Set;
/**
* Abstract skeleton implementation of a {@link MultivaluedMap} that is backed
* by a [key, multi-value] store represented as a {@link Map Map<K, List<V>>}.
*
* @param the type of keys maintained by this map.
* @param the type of mapped values.
* @author Marek Potociar
*/
public abstract class AbstractMultivaluedMap implements MultivaluedMap {
/**
* Backing store for the [key, multi-value] pairs.
*/
protected final Map> store;
/**
* Initialize the backing store in the abstract parent multivalued map
* implementation.
*
* @param store the backing {@link Map} to be used as a [key, multi-value]
* store. Must not be {@code null}.
* @throws NullPointerException in case the underlying {@code store} parameter
* is {@code null}.
*/
public AbstractMultivaluedMap(Map> store) {
if (store == null) {
throw new NullPointerException("Underlying store must not be 'null'.");
}
this.store = store;
}
/**
* Set the value for the key to be a one item list consisting of the supplied
* value. Any existing values will be replaced.
*
* NOTE: This implementation ignores {@code null} values; A supplied value
* of {@code null} is ignored and not added to the purged value list.
* As a result of such operation, empty value list would be registered for
* the supplied key. Overriding implementations may modify this behavior by
* redefining the {@link #addNull(java.util.List)} method.
*
* @param key the key
* @param value the single value of the key. If the value is {@code null} it
* will be ignored.
*/
@Override
public final void putSingle(K key, V value) {
List values = getValues(key);
values.clear();
if (value != null) {
values.add(value);
} else {
addNull(values);
}
}
/**
* Define the behavior for adding a {@code null} values to the value list.
*
* Default implementation is a no-op, i.e. the {@code null} values are ignored.
* Overriding implementations may modify this behavior by providing their
* own org.testifyproject.testifyprojectfinitions of this method.
*
* @param values value list where the {@code null} value addition is being
* requested.
*/
@SuppressWarnings("UnusedParameters")
protected void addNull(List values) {
// do nothing in the org.testifyproject.testifyprojectfault implementation; ignore the null value
}
/**
* Define the behavior for adding a {@code null} values to the first position
* in the value list.
*
* Default implementation is a no-op, i.e. the {@code null} values are ignored.
* Overriding implementations may modify this behavior by providing their
* own org.testifyproject.testifyprojectfinitions of this method.
*
* @param values value list where the {@code null} value addition is being
* requested.
*/
@SuppressWarnings("UnusedParameters")
protected void addFirstNull(List values) {
// do nothing in the org.testifyproject.testifyprojectfault implementation; ignore the null value
}
/**
* Add a value to the current list of values for the supplied key.
*
* NOTE: This implementation ignores {@code null} values; A supplied value
* of {@code null} is ignored and not added to the value list. Overriding
* implementations may modify this behavior by redefining the
* {@link #addNull(java.util.List)} method.
*
* @param key the key
* @param value the value to be added.
*/
@Override
public final void add(K key, V value) {
List values = getValues(key);
if (value != null) {
values.add(value);
} else {
addNull(values);
}
}
/**
* Add multiple values to the current list of values for the supplied key. If
* the supplied array of new values is empty, method returns immediately.
* Method throws a {@code NullPointerException} if the supplied array of values
* is {@code null}.
*
* NOTE: This implementation ignores {@code null} values; Any of the supplied values
* of {@code null} is ignored and not added to the value list. Overriding
* implementations may modify this behavior by redefining the
* {@link #addNull(java.util.List)} method.
*
* @param key the key.
* @param newValues the values to be added.
* @throws NullPointerException if the supplied array of new values is {@code null}.
*/
@Override
public final void addAll(K key, V... newValues) {
if (newValues == null) {
throw new NullPointerException("Supplied array of values must not be null.");
}
if (newValues.length == 0) {
return;
}
List values = getValues(key);
for (V value : newValues) {
if (value != null) {
values.add(value);
} else {
addNull(values);
}
}
}
/**
* Add all the values from the supplied value list to the current list of
* values for the supplied key. If the supplied value list is empty, method
* returns immediately. Method throws a {@code NullPointerException} if the
* supplied array of values is {@code null}.
*
* NOTE: This implementation ignores {@code null} values; Any {@code null} value
* in the supplied value list is ignored and not added to the value list. Overriding
* implementations may modify this behavior by redefining the
* {@link #addNull(java.util.List)} method.
*
* @param key the key.
* @param valueList the list of values to be added.
* @throws NullPointerException if the supplied value list is {@code null}.
*/
@Override
public final void addAll(K key, List valueList) {
if (valueList == null) {
throw new NullPointerException("Supplied list of values must not be null.");
}
if (valueList.isEmpty()) {
return;
}
List values = getValues(key);
for (V value : valueList) {
if (value != null) {
values.add(value);
} else {
addNull(values);
}
}
}
@Override
public final V getFirst(K key) {
List values = store.get(key);
if (values != null && values.size() > 0) {
return values.get(0);
} else {
return null;
}
}
/**
* Add a value to the first position in the current list of values for the
* supplied key.
*
* NOTE: This implementation ignores {@code null} values; A supplied value
* of {@code null} is ignored and not added to the purged value list. Overriding
* implementations may modify this behavior by redefining the
* {@link #addFirstNull(java.util.List)} method.
*
* @param key the key
* @param value the value to be added.
*/
@Override
public final void addFirst(K key, V value) {
List values = getValues(key);
if (value != null) {
values.add(0, value);
} else {
addFirstNull(values);
}
}
/**
* Return a non-null list of values for a given key. The returned list may be
* empty.
*
* If there is no entry for the key in the map, a new empty {@link List}
* instance is created, registered within the map to hold the values of
* the key and returned from the method.
*
* @param key the key.
* @return value list registered with the key. The method is guaranteed to never
* return {@code null}.
*/
protected final List getValues(K key) {
List l = store.get(key);
if (l == null) {
l = new LinkedList();
store.put(key, l);
}
return l;
}
@Override
public String toString() {
return store.toString();
}
/**
* {@inheritDoc }
*
* This implementation org.testifyproject.testifyprojectlegates the method call to to the the underlying
* [key, multi-value] store.
*
* @return a hash code value for the underlying [key, multi-value] store.
*/
@Override
public int hashCode() {
return store.hashCode();
}
/**
* {@inheritDoc }
*
* This implementation org.testifyproject.testifyprojectlegates the method call to to the the underlying
* [key, multi-value] store.
*
* @return {@code true} if the specified object is equal to the underlying
* [key, multi-value] store, {@code false} otherwise.
*/
@Override
@SuppressWarnings("EqualsWhichDoesntCheckParameterClass")
public boolean equals(Object o) {
return store.equals(o);
}
@Override
public Collection> values() {
return store.values();
}
@Override
public int size() {
return store.size();
}
@Override
public List remove(Object key) {
return store.remove(key);
}
@Override
public void putAll(Map> m) {
store.putAll(m);
}
@Override
public List put(K key, List value) {
return store.put(key, value);
}
@Override
public Set keySet() {
return store.keySet();
}
@Override
public boolean isEmpty() {
return store.isEmpty();
}
@Override
public List get(Object key) {
return store.get(key);
}
@Override
public Set>> entrySet() {
return store.entrySet();
}
@Override
public boolean containsValue(Object value) {
return store.containsValue(value);
}
@Override
public boolean containsKey(Object key) {
return store.containsKey(key);
}
@Override
public void clear() {
store.clear();
}
@Override
public boolean equalsIgnoreValueOrder(MultivaluedMap omap) {
if (this == omap) {
return true;
}
if (!keySet().equals(omap.keySet())) {
return false;
}
for (Entry> e : entrySet()) {
List olist = omap.get(e.getKey());
if (e.getValue().size() != olist.size()) {
return false;
}
for (V v : e.getValue()) {
if (!olist.contains(v)) {
return false;
}
}
}
return true;
}
}
