JSONCallback.java

// JSONCallback.java

package org.bson;

import java.text.*;
import java.util.*;
import java.util.logging.*;
import java.util.regex.*;

import org.bson.*;
import org.bson.types.*;

public class JSONCallback extends BasicBSONCallback {
    
    public BSONObject create(){
        return new BasicDBObject();
    }
    
    public BSONObject create( boolean array , List<String> path ){
        if ( array )
            return new BasicDBList();
        return new BasicDBObject();
    }

    public void objectStart(boolean array, String name){
        _lastName = name;
        _lastArray = array;
        super.objectStart( array , name );
    }

    public Object objectDone(){
        Object o = super.objectDone();
	BSONObject b = (BSONObject)o;

	if ( ! _lastArray ) {
	    if ( b.containsKey( "$oid" ) ) {
		o = new ObjectId((String)b.get("$oid"));
		if (!isStackEmpty()) {
		    gotObjectId( _lastName, (ObjectId)o);
		} else {
		    setRoot(o);
		} 
	    } else if ( b.containsKey( "$date" ) ) {
		SimpleDateFormat format = 
		    new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'Z'");
		format.setCalendar(new GregorianCalendar(new SimpleTimeZone(0, "GMT")));
		o = format.parse((String)b.get("$date"), new ParsePosition(0));
		if (!isStackEmpty()) {
		    cur().put( _lastName, o );
		} else {
		    setRoot(o);
		}
	    } else if ( b.containsKey( "$regex" ) ) {
		o = Pattern.compile( (String)b.get( "$regex" ), 
				     BSON.regexFlags( (String)b.get( "$options" )) );
		if (!isStackEmpty()) {
		    cur().put( _lastName, o );
		} else {
		    setRoot(o);
		}
	    }
	}
        
        return o;
    }

    private String _lastName;
    private boolean _lastArray = false;
}