/*
* Copyright 2004 The Apache Software Foundation.
*
* Licensed 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.
*
* $Header:$
*/
package org.apache.beehive.netui.tags.databinding.xml;
import java.lang.reflect.Method;
import java.lang.reflect.InvocationTargetException;
import javax.servlet.jsp.JspException;
import org.apache.beehive.netui.tags.AbstractClassicTag;
import org.apache.beehive.netui.util.internal.InternalStringBuilder;
import org.apache.beehive.netui.util.logging.Logger;
/**
* <p>
* A tag that serializes an XMLBean into the output of a JSP page in order to move data to the browser for data binding.
* </p>
* @jsptagref.tagdescription
* A tag that serializes an XMLBean into the output of a JSP page in order to move data to the browser for data binding.
* @netui:tag name="serializeXML"
* description="A tag that serializes an XMLBean into the output of a JSP page in order to move data to the browser for data binding."
*/
public class SerializeXML
extends AbstractClassicTag {
private static final Logger LOGGER = Logger.getInstance(SerializeXML.class);
private static final Object[] EMPTY_ARRAY = new Object[0];
private static final Class[] EMPTY_CLASS_ARRAY = new Class[0];
private Object _source;
private String _divName;
/**
* The name of this tag; this value is used for error reporting.
* @return the String name of this tag
*/
public String getTagName() {
return "SerializeXML";
}
/**
* Set the source document to be serialized. The object referenced here should be an instance of
* {@link org.apache.xmlbeans.XmlObject}.
* @param source the source
* @jsptagref.attributedescription
* Set the source document to be serialized. The object referenced here should be an instance of
* {@link org.apache.xmlbeans.XmlObject}.
* @jsptagref.attributesyntaxvalue <i>object_source</i>
* @netui:attribute required="true" rtexprvalue="true"
*/
public void setSource(Object source) {
_source = source;
}
/**
* Set the name of the div into which this XML will be rendered.
* @param divName the div name
* @jsptagref.attributedescription
* Set the name of the div into which this XML will be rendered.
* @jsptagref.attributesyntaxvalue <i>string_divName</i>
* @netui:attribute required="true" rtexprvalue="true"
*/
public void setDivName(String divName) {
_divName = divName;
}
public int doStartTag() {
return SKIP_BODY;
}
public int doEndTag()
throws JspException {
Object xmlText = null;
if(_source != null) {
Class xmlObject = null;
try {
xmlObject = Class.forName("org.apache.xmlbeans.XmlObject");
if(xmlObject.isAssignableFrom(_source.getClass())) {
Method method = xmlObject.getMethod("xmlText", EMPTY_CLASS_ARRAY);
xmlText = method.invoke(_source, EMPTY_ARRAY);
}
}
catch(ClassNotFoundException e) {
String msg = "Unable to serialize object; Apache XMLBeans is not available. To fix this problem, add XMLBeans to your project";
LOGGER.error(msg);
registerTagError(msg, e);
reportErrors();
localRelease();
return EVAL_PAGE;
}
catch(NoSuchMethodException e) {
String msg = "Unexpected exception occurred serializing supposed XMLBean. Caues: " + e;
assert false : msg;
LOGGER.error(msg);
localRelease();
return EVAL_PAGE;
}
catch(InvocationTargetException e) {
String msg = "Unexpected exception occurred serializing supposed XMLBean. Caues: " + e;
assert false : msg;
LOGGER.error(msg);
localRelease();
return EVAL_PAGE;
}
catch(IllegalAccessException e) {
String msg = "Unexpected exception occurred serializing supposed XMLBean. Caues: " + e;
assert false : msg;
LOGGER.error(msg);
localRelease();
return EVAL_PAGE;
}
InternalStringBuilder buf = new InternalStringBuilder();
buf.append("<div");
buf.append(" id=\"");
buf.append(_divName);
buf.append("\">\n<!--\n");
buf.append(xmlText);
buf.append("\n-->\n</div>");
write(buf.toString());
}
else LOGGER.info("The object to serialize was not an XMLBean");
localRelease();
return EVAL_PAGE;
}
public void localRelease() {
super.localRelease();
_source = null;
_divName = null;
}
}