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/*
 * $Id: MockRequestMap.java,v 1.1 2005/10/18 17:48:02 edburns Exp $
 */

/*
 * The contents of this file are subject to the terms
 * of the Common Development and Distribution License
 * (the License). You may not use this file except in
 * compliance with the License.
 * 
 * You can obtain a copy of the License at
 * https://javaserverfaces.dev.java.net/CDDL.html or
 * legal/CDDLv1.0.txt. 
 * See the License for the specific language governing
 * permission and limitations under the License.
 * 
 * When distributing Covered Code, include this CDDL
 * Header Notice in each file and include the License file
 * at legal/CDDLv1.0.txt.    
 * If applicable, add the following below the CDDL Header,
 * with the fields enclosed by brackets [] replaced by
 * your own identifying information:
 * "Portions Copyrighted [year] [name of copyright owner]"
 * 
 * [Name of File] [ver.__] [Date]
 * 
 * Copyright 2005 Sun Microsystems Inc. All Rights Reserved
 */

package com.sun.faces.mock;


import java.util.ArrayList;
import java.util.Collection;
import java.util.Enumeration;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.servlet.ServletRequest;


final class MockRequestMap implements Map {


    public MockRequestMap(ServletRequest request) {
        this.request = request;
    }


    private ServletRequest request = null;
 

    public void clear() {
        Iterator keys = keySet().iterator();
        while (keys.hasNext()) {
            request.removeAttribute((String) keys.next());
        }
    }


    public boolean containsKey(Object key) {
        return (request.getAttribute(key(key)) != null);
    }


    public boolean containsValue(Object value) {
        if (value == null) {
            return (false);
        }
        Enumeration keys = request.getAttributeNames();
        while (keys.hasMoreElements()) {
            Object next = request.getAttribute((String) keys.nextElement());
            if (next == value) {
                return (true);
            }
        }
        return (false);
    }


    public Set entrySet() {
        Set set = new HashSet();
        Enumeration keys = request.getAttributeNames();
        while (keys.hasMoreElements()) {
            set.add(request.getAttribute((String) keys.nextElement()));
        }
        return (set);
    }


    public boolean equals(Object o) {
        return (request.equals(o));
    }


    public Object get(Object key) {
        return (request.getAttribute(key(key)));
    }


    public int hashCode() {
        return (request.hashCode());
    }


    public boolean isEmpty() {
        return (size() < 1);
    }


    public Set keySet() {
        Set set = new HashSet();
        Enumeration keys = request.getAttributeNames();
        while (keys.hasMoreElements()) {
            set.add(keys.nextElement());
        }
        return (set);
    }


    public Object put(Object key, Object value) {
        if (value == null) {
            return (remove(key));
        }
        String skey = key(key);
        Object previous = request.getAttribute(skey);
        request.setAttribute(skey, value);
        return (previous);
    }


    public void putAll(Map map) {
        Iterator keys = map.keySet().iterator();
        while (keys.hasNext()) {
            String key = (String) keys.next();
            request.setAttribute(key, map.get(key));
        }
    }


    public Object remove(Object key) {
        String skey = key(key);
        Object previous = request.getAttribute(skey);
        request.removeAttribute(skey);
        return (previous);
    }


    public int size() {
        int n = 0;
        Enumeration keys = request.getAttributeNames();
        while (keys.hasMoreElements()) {
            keys.nextElement();
            n++;
        }
        return (n);
    }


    public Collection values() {
        List list = new ArrayList();
        Enumeration keys = request.getAttributeNames();
        while (keys.hasMoreElements()) {
            list.add(request.getAttribute((String) keys.nextElement()));
        }
        return (list);
    }


    private String key(Object key) {
        if (key == null) {
            throw new IllegalArgumentException();
        } else if (key instanceof String) {
            return ((String) key);
        } else {
            return (key.toString());
        }
    }


}