/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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 javax.servlet.jsp.tagext;

import javax.servlet.jsp.JspException;

/**
 * For a tag to declare that it accepts dynamic attributes, it must implement this interface. The entry for the tag in
 * the Tag Library Descriptor must also be configured to indicate dynamic attributes are accepted. <br>
 * For any attribute that is not declared in the Tag Library Descriptor for this tag, instead of getting an error at
 * translation time, the <code>setDynamicAttribute()</code> method is called, with the name and value of the attribute.
 * It is the responsibility of the tag to remember the names and values of the dynamic attributes.
 *
 * @since JSP 2.0
 */
public interface DynamicAttributes {

    /**
     * Called when a tag declared to accept dynamic attributes is passed an attribute that is not declared in the Tag
     * Library Descriptor.
     *
     * @param uri       the namespace of the attribute, or null if in the default namespace.
     * @param localName the name of the attribute being set.
     * @param value     the value of the attribute
     *
     * @throws JspException if the tag handler wishes to signal that it does not accept the given attribute. The
     *                          container must not call doStartTag() or doTag() for this tag.
     */
    void setDynamicAttribute(String uri, String localName, Object value) throws JspException;
}
