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package org.apache.velocity.anakia;
/*
* 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.
*/
import org.jdom.Element;
import org.jdom.Namespace;
import org.jdom.output.XMLOutputter;
import java.util.List;
/**
* A JDOM {@link Element} that is tailored for Anakia needs. It has
* {@link #selectNodes(String)} method as well as a {@link #toString()} that
* outputs the XML serialized form of the element. This way it acts in much the
* same way as a single-element {@link NodeList} would.
*
* @author Attila Szegedi
* @version $Id: AnakiaElement.java 463298 2006-10-12 16:10:32Z henning $
*/
public class AnakiaElement extends Element
{
/**
* Version Id for serializable
*/
private static final long serialVersionUID = 8429597252274491314L;
private static final XMLOutputter DEFAULT_OUTPUTTER = new XMLOutputter();
static
{
DEFAULT_OUTPUTTER.getFormat().setLineSeparator(System.getProperty("line.separator"));
}
/**
*
* This will create a new AnakiaElement
* with the supplied (local) name, and define
* the {@link Namespace} to be used.
* If the provided namespace is null, the element will have
* no namespace.
*
*
* @param name String name of element.
* @param namespace Namespace to put element in.
*/
public AnakiaElement(String name, Namespace namespace)
{
super(name, namespace);
}
/**
*
* This will create an AnakiaElement in no
* {@link Namespace}.
*
*
* @param name String name of element.
*/
public AnakiaElement(String name)
{
super(name);
}
/**
*
* This will create a new AnakiaElement with
* the supplied (local) name, and specifies the URI
* of the {@link Namespace} the Element
* should be in, resulting it being unprefixed (in the default
* namespace).
*
*
* @param name String name of element.
* @param uri String URI for Namespace element
* should be in.
*/
public AnakiaElement(String name, String uri)
{
super(name, uri);
}
/**
*
* This will create a new AnakiaElement with
* the supplied (local) name, and specifies the prefix and URI
* of the {@link Namespace} the Element
* should be in.
*
*
* @param name String name of element.
* @param prefix The prefix of the element.
* @param uri String URI for Namespace element
* should be in.
*/
public AnakiaElement(String name, String prefix, String uri)
{
super(name, prefix, uri);
}
/**
* Applies an XPath expression to this element and returns the resulting
* node list. In order for this method to work, your application must have
* access to werken.xpath library
* classes. The implementation does cache the parsed format of XPath
* expressions in a weak hash map, keyed by the string representation of
* the XPath expression. As the string object passed as the argument is
* usually kept in the parsed template, this ensures that each XPath
* expression is parsed only once during the lifetime of the template that
* first invoked it.
* @param xpathExpression the XPath expression you wish to apply
* @return a NodeList representing the nodes that are the result of
* application of the XPath to the current element. It can be empty.
*/
public NodeList selectNodes(String xpathExpression)
{
return new NodeList(XPathCache.getXPath(xpathExpression).applyTo(this), false);
}
/**
* Returns the XML serialized form of this element, as produced by the default
* {@link XMLOutputter}.
* @return The XML serialized form of this element, as produced by the default
* {@link XMLOutputter}.
*/
public String toString()
{
return DEFAULT_OUTPUTTER.outputString(this);
}
/**
*
* This returns the full content of the element as a NodeList which
* may contain objects of type String, Element,
* Comment, ProcessingInstruction,
* CDATA, and EntityRef.
* The List returned is "live" in document order and modifications
* to it affect the element's actual contents. Whitespace content is
* returned in its entirety.
*
*
* @return a List containing the mixed content of the
* element: may contain String,
* {@link Element}, {@link org.jdom.Comment},
* {@link org.jdom.ProcessingInstruction},
* {@link org.jdom.CDATA}, and
* {@link org.jdom.EntityRef} objects.
*/
public List getContent()
{
return new NodeList(super.getContent(), false);
}
/**
*
* This returns a NodeList of all the child elements
* nested directly (one level deep) within this element, as
* Element objects. If this target element has no nested
* elements, an empty List is returned. The returned list is "live"
* in document order and changes to it affect the element's actual
* contents.
*
*
* This performs no recursion, so elements nested two levels
* deep would have to be obtained with:
*
*
* Iterator itr = currentElement.getChildren().iterator();
* while (itr.hasNext()) {
* Element oneLevelDeep = (Element)nestedElements.next();
* List twoLevelsDeep = oneLevelDeep.getChildren();
* // Do something with these children
* }
*
*
*
*
* @return list of child Element objects for this element
*/
public List getChildren()
{
return new NodeList(super.getChildren(), false);
}
/**
*
* This returns a NodeList of all the child elements
* nested directly (one level deep) within this element with the given
* local name and belonging to no namespace, returned as
* Element objects. If this target element has no nested
* elements with the given name outside a namespace, an empty List
* is returned. The returned list is "live" in document order
* and changes to it affect the element's actual contents.
*
*
* Please see the notes for {@link #getChildren()}
* for a code example.
*
*
* @param name local name for the children to match
* @return all matching child elements
*/
public List getChildren(String name)
{
return new NodeList(super.getChildren(name));
}
/**
*
* This returns a NodeList of all the child elements
* nested directly (one level deep) within this element with the given
* local name and belonging to the given Namespace, returned as
* Element objects. If this target element has no nested
* elements with the given name in the given Namespace, an empty List
* is returned. The returned list is "live" in document order
* and changes to it affect the element's actual contents.
*
*
* Please see the notes for {@link #getChildren()}
* for a code example.
*
*
* @param name local name for the children to match
* @param ns Namespace to search within
* @return all matching child elements
*/
public List getChildren(String name, Namespace ns)
{
return new NodeList(super.getChildren(name, ns));
}
/**
*
* This returns the complete set of attributes for this element, as a
* NodeList of Attribute objects in no particular
* order, or an empty list if there are none.
* The returned list is "live" and changes to it affect the
* element's actual attributes.
*
*
* @return attributes for the element
*/
public List getAttributes()
{
return new NodeList(super.getAttributes());
}
}