mirror of git://gcc.gnu.org/git/gcc.git
133 lines
4.1 KiB
Java
133 lines
4.1 KiB
Java
/* ObjectId.java -- Simple object identification mechanism for XML encoding.
|
|
Copyright (C) 2005 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath 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 General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
|
|
package gnu.java.beans.encoder;
|
|
|
|
import java.util.HashMap;
|
|
|
|
/**
|
|
* <p>
|
|
* ObjectId provides an object identification mechanism which gives each object
|
|
* a name in the form <code><class><Nameindex></code>.
|
|
* </p>
|
|
*
|
|
* <p>
|
|
* Each id can be in an unused state which means that only one instance of the
|
|
* object is in use and a special id is not needed. Certain {@link
|
|
* gnu.java.beans.encoder.elements.Element} subclasses use this feature to find
|
|
* out whether they write the "id" attribute or not.
|
|
* </p>
|
|
* <p>
|
|
* An <code>ObjectId</code> instance is typically given to multiple objects.
|
|
* The second user should then invoke the {@link #init} method to generate the
|
|
* identification string and bring the id in the 'used' state.
|
|
* </p>
|
|
*
|
|
* @author Robert Schuster (robertschuster@fsfe.org)
|
|
*/
|
|
public class ObjectId
|
|
{
|
|
/**
|
|
* Stores the index an object of a specific type should be given.
|
|
*/
|
|
private static HashMap nameIndices = new HashMap();
|
|
|
|
private String id;
|
|
|
|
private Class klass;
|
|
|
|
ObjectId(Class klass)
|
|
{
|
|
this.klass = klass;
|
|
}
|
|
|
|
public boolean isUnused()
|
|
{
|
|
return id == null;
|
|
}
|
|
|
|
public String toString()
|
|
{
|
|
return (id != null) ? id : "<unused id>";
|
|
}
|
|
|
|
/**
|
|
* <p>
|
|
* Generates a simple Id by concatenating a class name with a self-increasing
|
|
* number.
|
|
* </p>
|
|
*/
|
|
public void init()
|
|
{
|
|
assert (klass != null);
|
|
|
|
if (id != null)
|
|
return;
|
|
|
|
Integer count = (Integer) nameIndices.get(klass);
|
|
if (count == null)
|
|
{
|
|
count = Integer.valueOf(0);
|
|
}
|
|
|
|
if (klass.isArray())
|
|
{
|
|
Class ct = klass.getComponentType();
|
|
if (ct == Boolean.TYPE)
|
|
id = "booleanArray" + count.intValue();
|
|
else if (ct == Byte.TYPE)
|
|
id = "byteArray" + count.intValue();
|
|
else if (ct == Short.TYPE)
|
|
id = "shortArray" + count.intValue();
|
|
else if (ct == Integer.TYPE)
|
|
id = "intArray" + count.intValue();
|
|
else if (ct == Long.TYPE)
|
|
id = "longArray" + count.intValue();
|
|
else if (ct == Float.TYPE)
|
|
id = "floatArray" + count.intValue();
|
|
else if (ct == Double.TYPE)
|
|
id = "doubleArray" + count.intValue();
|
|
}
|
|
else
|
|
id = klass.getName() + count.intValue();
|
|
|
|
nameIndices.put(klass, Integer.valueOf(count.intValue() + 1));
|
|
}
|
|
|
|
}
|