TagLibrary.java

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package com.sun.faces.facelets.tag;

import javax.faces.FacesException;
import javax.faces.view.facelets.Tag;
import javax.faces.view.facelets.TagConfig;
import javax.faces.view.facelets.TagHandler;
import java.lang.reflect.Method;

/**
 * A library of Tags associated with one or more namespaces.
 * 
 * @author Jacob Hookom
 * @version $Id$
 */
public interface TagLibrary {

    /**
     * true if the namespace is used in this library
     * 
     * @param ns
     *            namespace
     * @param t the tag instance currently active at the time
     * this method is called.  May be null

     */
    public boolean containsNamespace(String ns, Tag t);

    /**
     * If this library contains a TagHandler for the namespace and local name true if handled by this library
     * 
     * @param ns
     *            namespace
     * @param localName
     *            local name
     */
    public boolean containsTagHandler(String ns, String localName);

    /**
     * Create a new instance of a TagHandler, using the passed TagConfig
     * 
     * @param ns
     *            namespace
     * @param localName
     *            local name
     * @param tag
     *            configuration information
     * @return a new TagHandler instance
     * @throws FacesException
     */
    public TagHandler createTagHandler(String ns, String localName,
            TagConfig tag) throws FacesException;

    /**
     * If this library contains the specified function name
     * 
     * @param ns namespace
     * @param name function name
     * @return true if handled
     */
    public boolean containsFunction(String ns, String name);

    /**
     * Return a Method instance for the passed namespace and name
     * 
     * @param ns namespace
     * @param name function name
     */
    public Method createFunction(String ns, String name);
}