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/*****************************************************************************
* Java Plug-in Framework (JPF)
* Copyright (C) 2004-2007 Dmitry Olshansky
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*****************************************************************************/
package org.java.plugin.registry.xml;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.java.plugin.registry.Identity;
import org.java.plugin.registry.ManifestProcessingException;
/**
* @version $Id$
*/
abstract class IdentityImpl implements Identity {
/**
* Makes logging service available for descending classes.
*/
protected final Log log = LogFactory.getLog(getClass());
private final String id;
protected IdentityImpl(final String anId)
throws ManifestProcessingException {
id = anId;
if ((id == null) || (id.trim().length() == 0)) {
throw new ManifestProcessingException(
PluginRegistryImpl.PACKAGE_NAME,
"manifestElementIdIsBlank"); //$NON-NLS-1$
}
}
/**
* @see org.java.plugin.registry.Identity#getId()
*/
public String getId() {
return id;
}
protected abstract boolean isEqualTo(final Identity idt);
/**
* @see java.lang.Object#equals(java.lang.Object)
*/
@Override
public boolean equals(final Object obj) {
if (this == obj) {
return true;
}
if (!(obj instanceof Identity)) {
return false;
}
return isEqualTo((Identity) obj);
}
private int hashCode = -1;
/**
* @see java.lang.Object#hashCode()
*/
@Override
public int hashCode() {
if (hashCode == -1) {
hashCode = getClass().hashCode() ^ getId().hashCode();
}
return hashCode;
}
}
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