gnu.trove.decorator.TShortLongMapDecorator Maven / Gradle / Ivy
///////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2002, Eric D. Friedman All Rights Reserved.
// Copyright (c) 2009, Robert D. Eden All Rights Reserved.
// Copyright (c) 2009, Jeff Randall All Rights Reserved.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2.1 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
///////////////////////////////////////////////////////////////////////////////
package gnu.trove.decorator;
import gnu.trove.map.TShortLongMap;
import gnu.trove.iterator.TShortLongIterator;
import java.io.*;
import java.util.*;
//////////////////////////////////////////////////
// THIS IS A GENERATED CLASS. DO NOT HAND EDIT! //
//////////////////////////////////////////////////
/**
* Wrapper class to make a TShortLongMap conform to the java.util.Map API.
* This class simply decorates an underlying TShortLongMap and translates the Object-based
* APIs into their Trove primitive analogs.
*
* Note that wrapping and unwrapping primitive values is extremely inefficient. If
* possible, users of this class should override the appropriate methods in this class
* and use a table of canonical values.
*
* Created: Mon Sep 23 22:07:40 PDT 2002
*
* @author Eric D. Friedman
* @author Robert D. Eden
* @author Jeff Randall
*/
public class TShortLongMapDecorator extends AbstractMap
implements Map, Externalizable, Cloneable {
static final long serialVersionUID = 1L;
/** the wrapped primitive map */
protected TShortLongMap _map;
/**
* FOR EXTERNALIZATION ONLY!!
*/
public TShortLongMapDecorator() {}
/**
* Creates a wrapper that decorates the specified primitive map.
*
* @param map the TShortLongMap to wrap.
*/
public TShortLongMapDecorator( TShortLongMap map ) {
super();
this._map = map;
}
/**
* Returns a reference to the map wrapped by this decorator.
*
* @return the wrapped TShortLongMap instance.
*/
public TShortLongMap getMap() {
return _map;
}
/**
* Inserts a key/value pair into the map.
*
* @param key an Object value
* @param value an Object value
* @return the previous value associated with key,
* or Long(0) if none was found.
*/
public Long put( Short key, Long value ) {
short k;
long v;
if ( key == null ) {
k = _map.getNoEntryKey();
} else {
k = unwrapKey( key );
}
if ( value == null ) {
v = _map.getNoEntryValue();
} else {
v = unwrapValue( value );
}
long retval = _map.put( k, v );
if ( retval == _map.getNoEntryValue() ) {
return null;
}
return wrapValue( retval );
}
/**
* Retrieves the value for key
*
* @param key an Object value
* @return the value of key or null if no such mapping exists.
*/
public Long get( Object key ) {
short k;
if ( key != null ) {
if ( key instanceof Short ) {
k = unwrapKey( key );
} else {
return null;
}
} else {
k = _map.getNoEntryKey();
}
long v = _map.get( k );
// There may be a false positive since primitive maps
// cannot return null, so we have to do an extra
// check here.
if ( v == _map.getNoEntryValue() ) {
return null;
} else {
return wrapValue( v );
}
}
/**
* Empties the map.
*/
public void clear() {
this._map.clear();
}
/**
* Deletes a key/value pair from the map.
*
* @param key an Object value
* @return the removed value, or null if it was not found in the map
*/
public Long remove( Object key ) {
short k;
if ( key != null ) {
if ( key instanceof Short ) {
k = unwrapKey( key );
} else {
return null;
}
} else {
k = _map.getNoEntryKey();
}
long v = _map.remove( k );
// There may be a false positive since primitive maps
// cannot return null, so we have to do an extra
// check here.
if ( v == _map.getNoEntryValue() ) {
return null;
} else {
return wrapValue( v );
}
}
/**
* Returns a Set view on the entries of the map.
*
* @return a Set value
*/
public Set> entrySet() {
return new AbstractSet>() {
public int size() {
return _map.size();
}
public boolean isEmpty() {
return TShortLongMapDecorator.this.isEmpty();
}
public boolean contains( Object o ) {
if (o instanceof Map.Entry) {
Object k = ( ( Map.Entry ) o ).getKey();
Object v = ( ( Map.Entry ) o ).getValue();
return TShortLongMapDecorator.this.containsKey(k)
&& TShortLongMapDecorator.this.get(k).equals(v);
} else {
return false;
}
}
public Iterator> iterator() {
return new Iterator>() {
private final TShortLongIterator it = _map.iterator();
public Map.Entry next() {
it.advance();
final Short key = wrapKey( it.key() );
final Long v = wrapValue( it.value() );
return new Map.Entry() {
private Long val = v;
public boolean equals( Object o ) {
return o instanceof Map.Entry
&& ( ( Map.Entry ) o ).getKey().equals(key)
&& ( ( Map.Entry ) o ).getValue().equals(val);
}
public Short getKey() {
return key;
}
public Long getValue() {
return val;
}
public int hashCode() {
return key.hashCode() + val.hashCode();
}
public Long setValue( Long value ) {
val = value;
return put( key, value );
}
};
}
public boolean hasNext() {
return it.hasNext();
}
public void remove() {
it.remove();
}
};
}
public boolean add( Map.Entry o ) {
throw new UnsupportedOperationException();
}
public boolean remove( Object o ) {
boolean modified = false;
if ( contains( o ) ) {
//noinspection unchecked
Short key = ( ( Map.Entry ) o ).getKey();
_map.remove( unwrapKey( key ) );
modified = true;
}
return modified;
}
public boolean addAll( Collection> c ) {
throw new UnsupportedOperationException();
}
public void clear() {
TShortLongMapDecorator.this.clear();
}
};
}
/**
* Checks for the presence of val in the values of the map.
*
* @param val an Object value
* @return a boolean value
*/
public boolean containsValue( Object val ) {
return val instanceof Long && _map.containsValue( unwrapValue( val ) );
}
/**
* Checks for the present of key in the keys of the map.
*
* @param key an Object value
* @return a boolean value
*/
public boolean containsKey( Object key ) {
if ( key == null ) return _map.containsKey( _map.getNoEntryKey() );
return key instanceof Short && _map.containsKey( unwrapKey( key ) );
}
/**
* Returns the number of entries in the map.
*
* @return the map's size.
*/
public int size() {
return this._map.size();
}
/**
* Indicates whether map has any entries.
*
* @return true if the map is empty
*/
public boolean isEmpty() {
return size() == 0;
}
/**
* Copies the key/value mappings in map into this map.
* Note that this will be a deep copy, as storage is by
* primitive value.
*
* @param map a Map value
*/
public void putAll( Map map ) {
Iterator> it =
map.entrySet().iterator();
for ( int i = map.size(); i-- > 0; ) {
Entry e = it.next();
this.put( e.getKey(), e.getValue() );
}
}
/**
* Wraps a key
*
* @param k key in the underlying map
* @return an Object representation of the key
*/
protected Short wrapKey( short k ) {
return Short.valueOf( k );
}
/**
* Unwraps a key
*
* @param key wrapped key
* @return an unwrapped representation of the key
*/
protected short unwrapKey( Object key ) {
return ( ( Short ) key ).shortValue();
}
/**
* Wraps a value
*
* @param k value in the underlying map
* @return an Object representation of the value
*/
protected Long wrapValue( long k ) {
return Long.valueOf( k );
}
/**
* Unwraps a value
*
* @param value wrapped value
* @return an unwrapped representation of the value
*/
protected long unwrapValue( Object value ) {
return ( ( Long ) value ).longValue();
}
// Implements Externalizable
public void readExternal( ObjectInput in )
throws IOException, ClassNotFoundException {
// VERSION
in.readByte();
// MAP
_map = ( TShortLongMap ) in.readObject();
}
// Implements Externalizable
public void writeExternal( ObjectOutput out ) throws IOException {
// VERSION
out.writeByte(0);
// MAP
out.writeObject( _map );
}
} // TShortLongHashMapDecorator