/*
* 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.
*/
/*
* $Id: ElemElement.java 468643 2006-10-28 06:56:03Z minchau $
*/
package org.apache.xalan.templates;
import javax.xml.transform.TransformerException;
import org.apache.xalan.res.XSLTErrorResources;
import org.apache.xalan.transformer.TransformerImpl;
import org.apache.xml.serializer.SerializationHandler;
import org.apache.xml.utils.QName;
import org.apache.xml.utils.XML11Char;
import org.apache.xpath.XPathContext;
import org.xml.sax.SAXException;
/**
* Implement xsl:element
* <pre>
* <!ELEMENT xsl:element %template;>
* <!ATTLIST xsl:element
* name %avt; #REQUIRED
* namespace %avt; #IMPLIED
* use-attribute-sets %qnames; #IMPLIED
* %space-att;
* >
* </pre>
* @see <a href="http://www.w3.org/TR/xslt#section-Creating-Elements-with-xsl:element">XXX in XSLT Specification</a>
* @xsl.usage advanced
*/
public class ElemElement extends ElemUse
{
static final long serialVersionUID = -324619535592435183L;
/**
* The name attribute is interpreted as an attribute value template.
* It is an error if the string that results from instantiating the
* attribute value template is not a QName.
* @serial
*/
protected AVT m_name_avt = null;
/**
* Set the "name" attribute.
* The name attribute is interpreted as an attribute value template.
* It is an error if the string that results from instantiating the
* attribute value template is not a QName.
*
* @param v Name attribute to set for this element
*/
public void setName(AVT v)
{
m_name_avt = v;
}
/**
* Get the "name" attribute.
* The name attribute is interpreted as an attribute value template.
* It is an error if the string that results from instantiating the
* attribute value template is not a QName.
*
* @return Name attribute for this element
*/
public AVT getName()
{
return m_name_avt;
}
/**
* If the namespace attribute is present, then it also is interpreted
* as an attribute value template. The string that results from
* instantiating the attribute value template should be a URI reference.
* It is not an error if the string is not a syntactically legal URI reference.
* @serial
*/
protected AVT m_namespace_avt = null;
/**
* Set the "namespace" attribute.
* If the namespace attribute is present, then it also is interpreted
* as an attribute value template. The string that results from
* instantiating the attribute value template should be a URI reference.
* It is not an error if the string is not a syntactically legal URI reference.
*
* @param v NameSpace attribute to set for this element
*/
public void setNamespace(AVT v)
{
m_namespace_avt = v;
}
/**
* Get the "namespace" attribute.
* If the namespace attribute is present, then it also is interpreted
* as an attribute value template. The string that results from
* instantiating the attribute value template should be a URI reference.
* It is not an error if the string is not a syntactically legal URI reference.
*
* @return Namespace attribute for this element
*/
public AVT getNamespace()
{
return m_namespace_avt;
}
/**
* This function is called after everything else has been
* recomposed, and allows the template to set remaining
* values that may be based on some other property that
* depends on recomposition.
*/
public void compose(StylesheetRoot sroot) throws TransformerException
{
super.compose(sroot);
StylesheetRoot.ComposeState cstate = sroot.getComposeState();
java.util.Vector vnames = cstate.getVariableNames();
if(null != m_name_avt)
m_name_avt.fixupVariables(vnames, cstate.getGlobalsSize());
if(null != m_namespace_avt)
m_namespace_avt.fixupVariables(vnames, cstate.getGlobalsSize());
}
/**
* Get an int constant identifying the type of element.
* @see org.apache.xalan.templates.Constants
*
* @return The token ID for this element
*/
public int getXSLToken()
{
return Constants.ELEMNAME_ELEMENT;
}
/**
* Return the node name.
*
* @return This element's name
*/
public String getNodeName()
{
return Constants.ELEMNAME_ELEMENT_STRING;
}
/**
* Resolve the namespace into a prefix. Meant to be
* overidded by elemAttribute if this class is derived.
*
* @param rhandler The current result tree handler.
* @param prefix The probable prefix if already known.
* @param nodeNamespace The namespace.
*
* @return The prefix to be used.
*/
protected String resolvePrefix(SerializationHandler rhandler,
String prefix, String nodeNamespace)
throws TransformerException
{
// if (null != prefix && prefix.length() == 0)
// {
// String foundPrefix = rhandler.getPrefix(nodeNamespace);
//
// // System.out.println("nsPrefix: "+nsPrefix);
// if (null == foundPrefix)
// foundPrefix = "";
// }
return prefix;
}
/**
* Create an element in the result tree.
* The xsl:element element allows an element to be created with a
* computed name. The expanded-name of the element to be created
* is specified by a required name attribute and an optional namespace
* attribute. The content of the xsl:element element is a template
* for the attributes and children of the created element.
*
* @param transformer non-null reference to the the current transform-time state.
*
* @throws TransformerException
*/
public void execute(
TransformerImpl transformer)
throws TransformerException
{
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEvent(this);
SerializationHandler rhandler = transformer.getSerializationHandler();
XPathContext xctxt = transformer.getXPathContext();
int sourceNode = xctxt.getCurrentNode();
String nodeName = m_name_avt == null ? null : m_name_avt.evaluate(xctxt, sourceNode, this);
String prefix = null;
String nodeNamespace = "";
// Only validate if an AVT was used.
if ((nodeName != null) && (!m_name_avt.isSimple()) && (!XML11Char.isXML11ValidQName(nodeName)))
{
transformer.getMsgMgr().warn(
this, XSLTErrorResources.WG_ILLEGAL_ATTRIBUTE_VALUE,
new Object[]{ Constants.ATTRNAME_NAME, nodeName });
nodeName = null;
}
else if (nodeName != null)
{
prefix = QName.getPrefixPart(nodeName);
if (null != m_namespace_avt)
{
nodeNamespace = m_namespace_avt.evaluate(xctxt, sourceNode, this);
if (null == nodeNamespace ||
(prefix != null && prefix.length()>0 && nodeNamespace.length()== 0) )
transformer.getMsgMgr().error(
this, XSLTErrorResources.ER_NULL_URI_NAMESPACE);
else
{
// Determine the actual prefix that we will use for this nodeNamespace
prefix = resolvePrefix(rhandler, prefix, nodeNamespace);
if (null == prefix)
prefix = "";
if (prefix.length() > 0)
nodeName = (prefix + ":" + QName.getLocalPart(nodeName));
else
nodeName = QName.getLocalPart(nodeName);
}
}
// No namespace attribute was supplied. Use the namespace declarations
// currently in effect for the xsl:element element.
else
{
try
{
// Maybe temporary, until I get this worked out. test: axes59
nodeNamespace = getNamespaceForPrefix(prefix);
// If we get back a null nodeNamespace, that means that this prefix could
// not be found in the table. This is okay only for a default namespace
// that has never been declared.
if ( (null == nodeNamespace) && (prefix.length() == 0) )
nodeNamespace = "";
else if (null == nodeNamespace)
{
transformer.getMsgMgr().warn(
this, XSLTErrorResources.WG_COULD_NOT_RESOLVE_PREFIX,
new Object[]{ prefix });
nodeName = null;
}
}
catch (Exception ex)
{
transformer.getMsgMgr().warn(
this, XSLTErrorResources.WG_COULD_NOT_RESOLVE_PREFIX,
new Object[]{ prefix });
nodeName = null;
}
}
}
constructNode(nodeName, prefix, nodeNamespace, transformer);
if (transformer.getDebug())
transformer.getTraceManager().fireTraceEndEvent(this);
}
/**
* Construct a node in the result tree. This method is overloaded by
* xsl:attribute. At this class level, this method creates an element.
* If the node is null, we instantiate only the content of the node in accordance
* with section 7.1.2 of the XSLT 1.0 Recommendation.
*
* @param nodeName The name of the node, which may be <code>null</code>. If <code>null</code>,
* only the non-attribute children of this node will be processed.
* @param prefix The prefix for the namespace, which may be <code>null</code>.
* If not <code>null</code>, this prefix will be mapped and unmapped.
* @param nodeNamespace The namespace of the node, which may be not be <code>null</code>.
* @param transformer non-null reference to the the current transform-time state.
*
* @throws TransformerException
*/
void constructNode(
String nodeName, String prefix, String nodeNamespace, TransformerImpl transformer)
throws TransformerException
{
boolean shouldAddAttrs;
try
{
SerializationHandler rhandler = transformer.getResultTreeHandler();
if (null == nodeName)
{
shouldAddAttrs = false;
}
else
{
if (null != prefix)
{
rhandler.startPrefixMapping(prefix, nodeNamespace, true);
}
rhandler.startElement(nodeNamespace, QName.getLocalPart(nodeName),
nodeName);
super.execute(transformer);
shouldAddAttrs = true;
}
transformer.executeChildTemplates(this, shouldAddAttrs);
// Now end the element if name was valid
if (null != nodeName)
{
rhandler.endElement(nodeNamespace, QName.getLocalPart(nodeName),
nodeName);
if (null != prefix)
{
rhandler.endPrefixMapping(prefix);
}
}
}
catch (SAXException se)
{
throw new TransformerException(se);
}
}
/**
* Call the children visitors.
* @param visitor The visitor whose appropriate method will be called.
*/
protected void callChildVisitors(XSLTVisitor visitor, boolean callAttrs)
{
if(callAttrs)
{
if(null != m_name_avt)
m_name_avt.callVisitors(visitor);
if(null != m_namespace_avt)
m_namespace_avt.callVisitors(visitor);
}
super.callChildVisitors(visitor, callAttrs);
}
}