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    1   /*
    2    * $Id: ClosingUIBean.java 497654 2007-01-19 00:21:57Z rgielen $
    3    *
    4    * Licensed to the Apache Software Foundation (ASF) under one
    5    * or more contributor license agreements.  See the NOTICE file
    6    * distributed with this work for additional information
    7    * regarding copyright ownership.  The ASF licenses this file
    8    * to you under the Apache License, Version 2.0 (the
    9    * "License"); you may not use this file except in compliance
    10   * with the License.  You may obtain a copy of the License at
    11   *
    12   *  http://www.apache.org/licenses/LICENSE-2.0
    13   *
    14   * Unless required by applicable law or agreed to in writing,
    15   * software distributed under the License is distributed on an
    16   * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    17   * KIND, either express or implied.  See the License for the
    18   * specific language governing permissions and limitations
    19   * under the License.
    20   */
    21  package org.apache.struts2.components;
    22
    23  import java.io.Writer;
    24
    25  import javax.servlet.http.HttpServletRequest;
    26  import javax.servlet.http.HttpServletResponse;
    27
    28  import org.apache.commons.logging.Log;
    29  import org.apache.commons.logging.LogFactory;
    30  import org.apache.struts2.views.annotations.StrutsTagAttribute;
    31
    32  import com.opensymphony.xwork2.util.ValueStack;
    33
    34  /***
    35   * ClosingUIBean is the standard superclass for UI components such as div etc.
    36   */
    37  public abstract class ClosingUIBean extends UIBean {
    38      private static final Log LOG = LogFactory.getLog(ClosingUIBean.class);
    39
    40      protected ClosingUIBean(ValueStack stack, HttpServletRequest request, HttpServletResponse response) {
    41          super(stack, request, response);
    42      }
    43
    44      String openTemplate;
    45
    46      public abstract String getDefaultOpenTemplate();
    47
    48      @StrutsTagAttribute(description="Set template to use for opening the rendered html.")
    49      public void setOpenTemplate(String openTemplate) {
    50          this.openTemplate = openTemplate;
    51      }
    52
    53      public boolean start(Writer writer) {
    54          boolean result = super.start(writer);
    55          try {
    56              evaluateParams();
    57
    58              mergeTemplate(writer, buildTemplateName(openTemplate, getDefaultOpenTemplate()));
    59          } catch (Exception e) {
    60              LOG.error("Could not open template", e);
    61              e.printStackTrace();
    62          }
    63
    64          return result;
    65      }
    66  }