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/*
 * 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 org.apache.struts2.views;

import com.opensymphony.xwork2.util.ValueStack;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

/**
 * Provides Freemarker implementation classes for a tag library
 */
public interface TagLibraryModelProvider {

    /**
     * Gets a Java object that contains getters for the tag library's Freemarker models.
     * Called once per Freemarker template processing.
     *
     * @param stack The current value stack
     * @param req The HTTP request
     * @param res The HTTP response
     * @return The Java object containing the Freemarker model getter methods
     */
    Object getModels(ValueStack stack, HttpServletRequest req, HttpServletResponse res);

}