ContextImpl.java

/**
 * Copyright 2010 JBoss Inc
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.drools.command.impl;

import java.util.HashMap;
import java.util.Map;

import org.drools.command.Context;
import org.drools.command.ContextManager;

public class ContextImpl
    implements
    Context {
    
    private ContextManager      manager;
    
    private String              name;
    
    private Map<String, Object> context = new HashMap<String, Object>();

    private Context             delegate;
       
    private int depth;
    
    public ContextImpl(String name, ContextManager manager) {
        this.name = name;
        this.manager = manager;
        this.depth = 0;
    }
    
    public ContextImpl(String name, ContextManager manager, Context delegate) {
        this.name = name;
        this.manager = manager;
        setDelegate( delegate );
        this.depth = ((ContextImpl)delegate).getDepth() + 1;
    }

    public void setDelegate(Context delegate) {
        this.delegate = delegate;
    }
    

    public ContextManager getContextManager() {
        return this.manager;
    }

    public String getName() {
        return this.name;
    }    

    public Object get(String identifier) {
        Object object = context.get( identifier );
        if ( object == null && delegate != null ) {
            object = this.delegate.get( identifier );
        }
        return object;
    }

    public void set(String name,
                    Object object) {
        context.put( name,
                     object );
    }
    
    public int getDepth() {
        return this.depth;
    }

    public void remove(String name) {
        context.remove(name);
    }

}