You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
138 lines
4.1 KiB
138 lines
4.1 KiB
// This class is taken from the Classpath project.
|
|
// Please note the different copyright holder!
|
|
// The changes I did is this comment, the package line, some
|
|
// imports from java.util and some minor jdk12 -> jdk11 fixes.
|
|
// -- Jochen Hoenicke <jochen@gnu.org>
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
// BasicMapEntry.java -- a class providing a plain-vanilla implementation of
|
|
// the Map.Entry interface; could be used anywhere in
|
|
// java.util
|
|
//
|
|
// Copyright (c) 1998 by Jon A. Zeppieri (jon@eease.com)
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU Library General Public License as published
|
|
// by the Free Software Foundation, version 2. (see COPYING.LIB)
|
|
//
|
|
// This program 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 Library General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Library 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 jode.util;
|
|
///#ifdef JDK12
|
|
///import java.lang.UnsupportedOperationException;
|
|
///import java.util.Map;
|
|
///#endif
|
|
|
|
/**
|
|
* a class which implements Map.Entry
|
|
*
|
|
* @author Jon Zeppieri
|
|
* @version $Revision$
|
|
* @modified $Id$
|
|
*/
|
|
class BasicMapEntry implements Map.Entry
|
|
{
|
|
/** the key */
|
|
Object key;
|
|
/** the value */
|
|
Object value;
|
|
|
|
/**
|
|
* construct a new BasicMapEntry with the given key and value
|
|
*
|
|
* @param newKey the key of this Entry
|
|
* @param newValue the value of this Entry
|
|
*/
|
|
BasicMapEntry(Object newKey, Object newValue)
|
|
{
|
|
key = newKey;
|
|
value = newValue;
|
|
}
|
|
|
|
/**
|
|
* returns true if <pre>o</pre> is a Map.Entry and
|
|
* <pre>
|
|
* (((o.getKey == null) ? (key == null) :
|
|
* o.getKey().equals(key)) &&
|
|
* ((o.getValue() == null) ? (value == null) :
|
|
* o.getValue().equals(value)))
|
|
* </pre>
|
|
*
|
|
* NOTE: the calls to getKey() and getValue() in this implementation
|
|
* are <i>NOT</i> superfluous and should not be removed. They insure
|
|
* that subclasses such as HashMapEntry work correctly
|
|
*
|
|
* @param o the Object being tested for equality
|
|
*/
|
|
public boolean equals(Object o)
|
|
{
|
|
Map.Entry tester;
|
|
Object oTestingKey, oTestingValue;
|
|
Object oKey, oValue;
|
|
if (o instanceof Map.Entry)
|
|
{
|
|
tester = (Map.Entry) o;
|
|
oKey = getKey();
|
|
oValue = getValue();
|
|
oTestingKey = tester.getKey();
|
|
oTestingValue = tester.getValue();
|
|
return (((oTestingKey == null) ? (oKey == null) :
|
|
oTestingKey.equals(oKey)) &&
|
|
((oTestingValue == null) ? (oValue == null) :
|
|
oTestingValue.equals(oValue)));
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/** returns the key */
|
|
public Object getKey()
|
|
{
|
|
return key;
|
|
}
|
|
|
|
/** returns the value */
|
|
public Object getValue()
|
|
{
|
|
return value;
|
|
}
|
|
|
|
/** the hashCode() for a Map.Entry is
|
|
* <pre>
|
|
* ((getKey() == null) ? 0 : getKey().hashCode()) ^
|
|
* ((getValue() == null) ? 0 : getValue().hashCode());
|
|
* </pre>
|
|
*
|
|
* NOTE: the calls to getKey() and getValue() in this implementation
|
|
* are <i>NOT</i> superfluous and should not be removed. They insure
|
|
* that subclasses such as HashMapEntry work correctly
|
|
*/
|
|
public int hashCode()
|
|
{
|
|
Object oKey = getKey();
|
|
Object oValue = getValue();
|
|
return ((oKey == null) ? 0 : oKey.hashCode()) ^
|
|
((oValue == null) ? 0 : oValue.hashCode());
|
|
}
|
|
|
|
/**
|
|
* sets the value of this Map.Entry
|
|
*
|
|
* @param newValue the new value of this Map.Entry
|
|
*/
|
|
public Object setValue(Object newValue)
|
|
throws UnsupportedOperationException, ClassCastException,
|
|
IllegalArgumentException, NullPointerException
|
|
{
|
|
Object oVal = value;
|
|
value = newValue;
|
|
return oVal;
|
|
}
|
|
}
|
|
|