package com.dbxml.labrador.objects;
/*
* The dbXML Labrador Software License, Version 1.0
*
*
* Copyright (c) 2003 The dbXML Group, L.L.C. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by The
* dbXML Group, L.L.C. (http://www.dbxml.com/)."
* Alternately, this acknowledgment may appear in the software
* itself, if and wherever such third-party acknowledgments normally
* appear.
*
* 4. The names "Labrador" and "dbXML Group" must not be used to
* endorse or promote products derived from this software without
* prior written permission. For written permission, please contact
* info@dbxml.com
*
* 5. Products derived from this software may not be called "Labrador",
* nor may "Labrador" appear in their name, without prior written
* permission of The dbXML Group, L.L.C..
*
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE DBXML GROUP, L.L.C. OR ITS
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
* ====================================================================
*
* $Id: ObjectInstance.java,v 1.6 2003/12/15 06:43:10 bradford Exp $
*/
import com.dbxml.labrador.Discovery;
import com.dbxml.labrador.exceptions.RequestException;
import com.dbxml.labrador.util.BaseInstance;
import java.util.HashMap;
import java.util.Map;
/**
* ObjectInstance
*/
public final class ObjectInstance extends BaseInstance {
private static final Map discMap = new HashMap();
private static final Object discMutex = new Object();
private Object obj;
private ObjectDiscovery disc;
public ObjectInstance(Object obj) {
this.obj = obj;
Class c = obj.getClass();
synchronized ( c ) {
synchronized ( discMutex ) {
disc = (ObjectDiscovery)discMap.get(c);
}
if ( disc == null ) {
try {
disc = new ObjectDiscovery(c);
synchronized ( discMutex ) {
discMap.put(c, disc);
}
}
catch ( Exception e ) {
}
}
}
}
public Object getObject() {
return obj;
}
public Object getProperty(String name) throws RequestException {
Object val = super.getProperty(name);
if ( val != null )
return val;
else
return disc.getStaticField(name);
}
public Discovery getDiscovery() {
return disc;
}
public Object invoke() throws RequestException {
try {
return disc.invoke(obj, getMethodName(), getParameters());
}
catch ( RequestException e ) {
throw e;
}
catch ( Throwable t ) {
throw new RequestException(t.getMessage());
}
}
}