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package com.sun.enterprise.deployment;

import com.sun.enterprise.deployment.web.WebResourceCollection;
import java.util.*;

/** 
 * This descriptor represents a description of a portion of a web app
 * in terms of a collection of url patterns and 
 * a collection of http methods on this patterns.
 *
 *@author Danny Coward
 */


public class WebResourceCollectionImpl extends Descriptor 
				implements WebResourceCollection 
{
    private Set urlPatterns;
    private Set httpMethods;
    
    /** 
     * Return my urls patterns (String objects)
     * @return the enumeration of the url patterns.
     */
    public Enumeration getUrlPatterns() {
	return (new Vector(this.getUrlPatternsSet())).elements();
    }
    
    /**
     * Add a URL pattern to this collection.
     * @param the url pattern to be added.
     */
    public void addUrlPattern(String urlPattern) {
	this.getUrlPatternsSet().add(urlPattern);
    }
    
    /**
     * Remove the specified url pattern from the collection.
     * @param the url pattern to be removed.
     */
    public void removeUrlPattern(String urlPattern) {
	this.getUrlPatternsSet().remove(urlPattern);
    }
    
    /**
     * Clean out the collection of URL pattern and replace
     * it with the given Set of (String) url patterns.
     * @param the url patterns to replace the current set. 
     */
    public void setUrlPatterns(Set urlPatterns) {
	this.urlPatterns = urlPatterns;
    }
    
    private Set getHttpMethodsSet() {
	if (this.httpMethods == null) {
	    this.httpMethods = new HashSet();
	}
	return this.httpMethods;
    }
    
    /**
     * Return the enumeration of HTTP methods this collection has.
     * @return the enumeration of HTTP methods.
     */
    public Enumeration getHttpMethods() {
	return (new Vector(this.getHttpMethodsSet())).elements();
    }
    /** 
     * Returns the HttpMethods this collection has in an array of strings
     * @return array of strings of HttpMethods
     */
    /*
     * added to speed up processing while creating webresource permissions
     */
    public String[] getHttpMethodsAsArray(){
	if(httpMethods == null){
	    return (String[]) null;
	}
	String[] array = (String[])httpMethods.toArray(new String[0]);
	return array;
    }
    /**
     * Sets the set of HTTP methods this collection has.
     * @param the set of HTTP methods.
     */
    public void setHttpMethods(Set httpMethods) {
	this.httpMethods = httpMethods;
    }

    /**
     * Adds the given HTTP method to the collection of http methods this
     * collection has.
     * @param the HTTP method to be added.
     */
    public void addHttpMethod(String httpMethod) {
	this.getHttpMethodsSet().add(httpMethod);
    }
    
    /**
     * Removes the given HTTP method from the collection of http methods.
     * @param the HTTP method to be removed.
     */
    public void removeHttpMethod(String httpMethod) {
	this.getHttpMethodsSet().remove(httpMethod);    
    }
    
    /**
     * A formatted string of the state.
     */
    public void print(StringBuffer toStringBuffer) {
	toStringBuffer.append("WebresourceCollection: ");
	toStringBuffer.append(" urlPatterns: ").append(this.urlPatterns);
	toStringBuffer.append(" httpMethods ").append(this.httpMethods);
    }

    private Set getUrlPatternsSet() {
	if (this.urlPatterns == null) {
	    this.urlPatterns = new HashSet();
	}
	return this.urlPatterns;
    }

}