/*
* 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.myfaces.trinidadinternal.taglib.listener;
import org.apache.myfaces.trinidadinternal.taglib.util.TagUtils;
import java.io.OutputStream;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.servlet.jsp.tagext.TagSupport;
import javax.servlet.jsp.JspException;
import javax.faces.application.Application;
import javax.faces.component.ActionSource;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.webapp.UIComponentTag;
import org.apache.myfaces.trinidad.webapp.ELContextTag;
import org.apache.myfaces.trinidad.logging.TrinidadLogger;
/**
*/
public class FileDownloadActionListenerTag extends TagSupport
{
public void setContentType(ValueExpression contentType)
{
_contentType = contentType;
}
public void setFilename(ValueExpression filename)
{
_filename = filename;
}
public void setMethod(MethodExpression method)
{
_method = method;
}
@Override
public int doStartTag() throws JspException
{
UIComponentTag tag = UIComponentTag.getParentUIComponentTag(pageContext);
if (tag == null)
{
throw new JspException(_LOG.getMessage(
"FILEDOWNLOADACTIONLISTENER_MUST_INSIDE_UICOMPONENT_TAG"));
}
// Only run on the first time the tag executes
if (!tag.getCreated())
return SKIP_BODY;
UIComponent component = tag.getComponentInstance();
if (!(component instanceof ActionSource))
{
throw new JspException(_LOG.getMessage(
"FILEDOWNLOADACTIONLISTENER_MUST_INSIDE_UICOMPONENT_TAG"));
}
ELContextTag parentELContext = (ELContextTag)
findAncestorWithClass(this, ELContextTag.class);
Application application =
FacesContext.getCurrentInstance().getApplication();
FileDownloadActionListener listener = new FileDownloadActionListener();
if (_filename != null)
{
listener.setValueExpression(FileDownloadActionListener.FILENAME_KEY,
_filename);
}
if (_contentType != null)
{
listener.setValueExpression(FileDownloadActionListener.CONTENT_TYPE_KEY,
_contentType);
}
listener.setMethod(_method);
((ActionSource) component).addActionListener(listener);
return super.doStartTag();
}
@Override
public void release()
{
super.release();
_contentType = null;
_filename = null;
_method = null;
}
private ValueExpression _contentType;
private ValueExpression _filename;
private MethodExpression _method;
private static final TrinidadLogger _LOG = TrinidadLogger.createTrinidadLogger(
FileDownloadActionListenerTag.class);
}