/**
 * Copyright (c) 2014, the Railo Company Ltd.
 * Copyright (c) 2015, Lucee Assosication Switzerland
 *
 * 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, see <http://www.gnu.org/licenses/>.
 * 
 */
package lucee.runtime.type.ref;

import lucee.runtime.PageContext;
import lucee.runtime.exp.PageException;
import lucee.runtime.type.Collection;
import lucee.runtime.type.KeyImpl;
import lucee.runtime.type.StructImpl;

/**
 * Handle a Reference
 */
public final class ReferenceReference implements Reference {

    private Reference reference;
    private Collection.Key key;

    /**
     * @param reference
     * @param key
     */
    public ReferenceReference(Reference reference, String key) {
        this(reference,KeyImpl.init(key));
    }

    public ReferenceReference(Reference reference, Collection.Key key) {
        this.reference=reference;
        this.key=key;
    }

    @Override
    public Collection.Key getKey() {
        return key;
    }

    @Override
    public String getKeyAsString() {
        return key.getString();
    }

    @Override
    public Object get(PageContext pc) throws PageException {
        return pc.getCollection(reference.get(pc),key);       
    }

    @Override
    public Object get(PageContext pc, Object defaultValue) {
        return pc.getCollection(reference.get(pc,null),key,defaultValue);       
    }

    @Override
    public Object set(PageContext pc, Object value) throws PageException {
        return pc.set(reference.touch(pc),key,value);
    }

    @Override
    public Object setEL(PageContext pc, Object value) {
        try {
			return set(pc,value);
		} catch (PageException e) {
			return null;
		}
    }

    @Override
    public Object touch(PageContext pc) throws PageException {
        Object parent=reference.touch(pc);
        Object o= pc.getCollection(parent,key,null);
        if(o!=null) return o;
        return pc.set(parent,key,new StructImpl());
    }
    
    @Override
	public Object touchEL(PageContext pc) {
        Object parent=reference.touchEL(pc);
        Object o= pc.getCollection(parent,key,null);
        if(o!=null) return o;
        try {
			return pc.set(parent,key,new StructImpl());
		} catch (PageException e) {
			return null;
		}
    }

    @Override
    public Object remove(PageContext pc) throws PageException {
        return pc.getVariableUtil().remove(reference.get(pc),key);
    }

    @Override
    public Object removeEL(PageContext pc) {
        return pc.getVariableUtil().removeEL(reference.get(pc,null),key);
    }

    @Override
    public Object getParent() {
        return reference;
    }
    @Override
    public String toString() {
        return "java.util.ReferenceReference(reference:"+reference+";key:"+key+")";
    }
}