/*
* Created on Aug 30, 2004
*
* TODO To change the template for this generated file go to
* Window - Preferences - Java - Code Style - Code Templates
*/
package com.draagon.meta.manager;
import java.util.ArrayList;
import com.draagon.meta.MetaClass;
/**
* @author dmealing
*/
public class ObjectRef {
private final static String OBJECTREF_PREFIX = "objectref://";
private final static String OBJECTREF_SEP = "/";
private String mRef = null;
private MetaClass mMetaClass = null;
private String [] mIds = null;
public ObjectRef( String ref ) {
if ( ref == null || ref.length() == 0 || !ref.startsWith( OBJECTREF_PREFIX ))
throw new IllegalArgumentException( "Invalid object reference [" + ref + "]" );
int i = ref.indexOf( OBJECTREF_SEP, OBJECTREF_PREFIX.length() + 1 );
if ( i < 0 )
throw new IllegalArgumentException( "Invalid object reference [" + ref + "]" );
MetaClass mc = MetaClass.forName( ref.substring( OBJECTREF_PREFIX.length(), i ));
i += OBJECTREF_SEP.length();
ArrayList<String> al = new ArrayList<String>();
while( true )
{
int j = ref.indexOf( OBJECTREF_SEP, i );
if ( j > 0 ) {
al.add( ref.substring( i, j ));
i = j + OBJECTREF_SEP.length();
}
else {
if ( ref.substring( i ).trim().length() > 0 )
al.add( ref.substring( i ).trim() );
break;
}
}
String [] ids = (String []) al.toArray( new String[ al.size() ]);
verifyIds( mc, ids );
mRef = ref;
mMetaClass = mc;
mIds = ids;
}
public ObjectRef( MetaClass mc, String [] ids ) {
verifyIds( mc, ids );
mMetaClass = mc;
mIds = ids;
}
protected void verifyIds( MetaClass mc, String [] ids ) {
for( int i = 0; i < ids.length; i++ ) {
if ( ids[ i ] == null || ids[ i ].length() == 0
|| ids[ i ].indexOf( OBJECTREF_PREFIX ) >=0
|| ids[ i ].indexOf( OBJECTREF_SEP ) >= 0 )
throw new IllegalArgumentException( "Invalid object reference id [" + ids[ i ] + "] at index (" + i + ") for MetaClass [" + mc + "]" );
}
}
public String [] getIds() {
return mIds;
}
public MetaClass getMetaClass() {
return mMetaClass;
}
public String toString() {
if ( mRef != null ) return mRef;
StringBuffer b = new StringBuffer();
b.append( OBJECTREF_PREFIX );
b.append( getMetaClass().getName() );
b.append( OBJECTREF_SEP );
for( int i = 0; i < mIds.length; i++ ) {
if ( i > 0 ) b.append( OBJECTREF_SEP );
b.append( mIds[ i ]);
}
mRef = b.toString();
return mRef;
}
public int hashCode()
{
return toString().hashCode();
}
public boolean equals( Object o ) {
if ( o instanceof String || o instanceof ObjectRef ) {
if ( o.toString().equals( toString() )) return true;
}
return false;
}
}