- /*
- * The Apache Software License, Version 1.1
- *
- *
- * Copyright (c) 1999 The Apache Software Foundation. All rights
- * reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. The end-user documentation included with the redistribution,
- * if any, must include the following acknowledgment:
- * "This product includes software developed by the
- * Apache Software Foundation (http://www.apache.org/)."
- * Alternately, this acknowledgment may appear in the software itself,
- * if and wherever such third-party acknowledgments normally appear.
- *
- * 4. The names "Xalan" and "Apache Software Foundation" must
- * not be used to endorse or promote products derived from this
- * software without prior written permission. For written
- * permission, please contact apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache",
- * nor may "Apache" appear in their name, without prior written
- * permission of the Apache Software Foundation.
- *
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
- * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
- * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
- * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
- * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
- * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Software Foundation and was
- * originally based on software copyright (c) 1999, Lotus
- * Development Corporation., http://www.lotus.com. For more
- * information on the Apache Software Foundation, please see
- * <http://www.apache.org/>.
- */
- package org.apache.xalan.templates;
-
- import java.io.*;
-
- import java.util.*;
-
- //import org.w3c.dom.*;
-
- import org.xml.sax.*;
- import org.xml.sax.helpers.*;
-
- import java.util.StringTokenizer;
-
- import org.apache.xml.utils.QName;
- import org.apache.xml.utils.NameSpace;
- import org.apache.xml.utils.StringToStringTable;
- import org.apache.xpath.XPathContext;
- import org.apache.xml.utils.MutableAttrListImpl;
- import org.apache.xalan.res.XSLMessages;
- import org.apache.xpath.XPathContext;
- import org.apache.xalan.res.XSLTErrorResources;
- import org.apache.xalan.extensions.ExtensionHandler;
- import org.apache.xalan.extensions.ExtensionsTable;
- import org.apache.xalan.transformer.TransformerImpl;
-
- import javax.xml.transform.TransformerException;
-
- import org.apache.xml.dtm.DTM;
-
- /**
- * <meta name="usage" content="advanced"/>
- * Implement an extension element.
- * @see <a href="http://www.w3.org/TR/xslt#extension-element">extension-element in XSLT Specification</a>
- */
- public class ElemExtensionCall extends ElemLiteralResult
- {
-
- /** The Namespace URI for this extension call element.
- * @serial */
- String m_extns;
-
- /** Language used by extension.
- * @serial */
- String m_lang;
-
- /** URL pointing to extension.
- * @serial */
- String m_srcURL;
-
- /** Source for script.
- * @serial */
- String m_scriptSrc;
-
- /** Declaration for Extension element.
- * @serial */
- ElemExtensionDecl m_decl = null;
-
- /**
- * 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_EXTENSIONCALL;
- }
-
- /**
- * Return the node name.
- *
- * @return The element's name
- */
-
- // public String getNodeName()
- // {
- // TODO: Need prefix.
- // return localPart;
- // }
-
- /**
- * 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);
- m_extns = this.getNamespace();
- m_decl = getElemExtensionDecl(sroot, m_extns);
- // Register the extension namespace if the extension does not have
- // an ElemExtensionDecl ("component").
- if (m_decl == null)
- sroot.getExtensionNamespacesManager().registerExtension(m_extns);
- }
-
- /**
- * Return the ElemExtensionDecl for this extension element
- *
- *
- * @param stylesheet Stylesheet root associated with this extension element
- * @param namespace Namespace associated with this extension element
- *
- * @return the ElemExtensionDecl for this extension element.
- */
- private ElemExtensionDecl getElemExtensionDecl(StylesheetRoot stylesheet,
- String namespace)
- {
-
- ElemExtensionDecl decl = null;
- int n = stylesheet.getGlobalImportCount();
-
- for (int i = 0; i < n; i++)
- {
- Stylesheet imported = stylesheet.getGlobalImport(i);
-
- for (ElemTemplateElement child = imported.getFirstChildElem();
- child != null; child = child.getNextSiblingElem())
- {
- if (Constants.ELEMNAME_EXTENSIONDECL == child.getXSLToken())
- {
- decl = (ElemExtensionDecl) child;
-
- String prefix = decl.getPrefix();
- String declNamespace = child.getNamespaceForPrefix(prefix);
-
- if (namespace.equals(declNamespace))
- {
- return decl;
- }
- }
- }
- }
-
- return null;
- }
-
- /**
- * Execute the fallbacks when an extension is not available.
- *
- * @param transformer non-null reference to the the current transform-time state.
- * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
- * @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>.
- *
- * @throws TransformerException
- */
- public void executeFallbacks(
- TransformerImpl transformer)
- throws TransformerException
- {
- for (ElemTemplateElement child = m_firstChild; child != null;
- child = child.m_nextSibling)
- {
- if (child.getXSLToken() == Constants.ELEMNAME_FALLBACK)
- {
- try
- {
- transformer.pushElemTemplateElement(child);
- ((ElemFallback) child).executeFallback(transformer);
- }
- finally
- {
- transformer.popElemTemplateElement();
- }
- }
- }
-
- }
-
- /**
- * Return true if this extension element has a <xsl:fallback> child element.
- *
- * @return true if this extension element has a <xsl:fallback> child element.
- */
- public boolean hasFallbackChildren()
- {
- for (ElemTemplateElement child = m_firstChild; child != null;
- child = child.m_nextSibling)
- {
- if (child.getXSLToken() == Constants.ELEMNAME_FALLBACK)
- return true;
- }
-
- return false;
- }
-
-
- /**
- * Execute an extension.
- *
- * @param transformer non-null reference to the the current transform-time state.
- * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
- * @param mode reference, which may be null, to the <a href="http://www.w3.org/TR/xslt#modes">current mode</a>.
- *
- * @throws TransformerException
- */
- public void execute(TransformerImpl transformer)
- throws TransformerException
- {
-
- try
- {
- transformer.getResultTreeHandler().flushPending();
-
- ExtensionsTable etable = transformer.getExtensionsTable();
- ExtensionHandler nsh = etable.get(m_extns);
-
- if (null == nsh)
- {
- if (hasFallbackChildren())
- {
- executeFallbacks(transformer);
- }
- else
- {
- TransformerException te = new TransformerException(XSLMessages.createMessage(
- XSLTErrorResources.ER_CALL_TO_EXT_FAILED, new Object[]{getNodeName()}));
- transformer.getErrorListener().fatalError(te);
- }
-
- return;
- }
-
- try
- {
- nsh.processElement(this.getLocalName(), this, transformer,
- getStylesheet(), this);
- }
- catch (Exception e)
- {
-
- if (hasFallbackChildren())
- executeFallbacks(transformer);
- else
- {
- if(e instanceof TransformerException)
- {
- TransformerException te = (TransformerException)e;
- if(null == te.getLocator())
- te.setLocator(this);
-
- transformer.getErrorListener().fatalError(te);
- }
- else if (e instanceof RuntimeException)
- {
- transformer.getErrorListener().fatalError(new TransformerException(e));
- }
- else
- {
- transformer.getErrorListener().warning(new TransformerException(e));
- }
- }
- }
- }
- catch(org.xml.sax.SAXException se)
- {
- transformer.getErrorListener().fatalError(new TransformerException(se));
- }
- }
-
- /**
- * Return the raw value of the attribute.
- *
- * @param rawName Raw name of the attribute to get
- *
- * @return the raw value of the attribute or null if not found
- */
- public String getAttribute(String rawName)
- {
-
- AVT avt = getLiteralResultAttribute(rawName);
-
- if ((null != avt) && avt.getRawName().equals(rawName))
- {
- return avt.getSimpleString();
- }
-
- return null;
- }
-
- /**
- * Return the value of the attribute interpreted as an Attribute
- * Value Template (in other words, you can use curly expressions
- * such as href="http://{website}".
- *
- * @param rawName Raw name of the attribute to get
- * @param sourceNode non-null reference to the <a href="http://www.w3.org/TR/xslt#dt-current-node">current source node</a>.
- * @param transformer non-null reference to the the current transform-time state.
- *
- * @return the value of the attribute
- *
- * @throws TransformerException
- */
- public String getAttribute(
- String rawName, org.w3c.dom.Node sourceNode, TransformerImpl transformer)
- throws TransformerException
- {
-
- AVT avt = getLiteralResultAttribute(rawName);
-
- if ((null != avt) && avt.getRawName().equals(rawName))
- {
- XPathContext xctxt = transformer.getXPathContext();
-
- return avt.evaluate(xctxt,
- xctxt.getDTMHandleFromNode(sourceNode),
- this);
- }
-
- return null;
- }
-
- /**
- * Accept a visitor and call the appropriate method
- * for this class.
- *
- * @param visitor The visitor whose appropriate method will be called.
- * @return true if the children of the object should be visited.
- */
- protected boolean accept(XSLTVisitor visitor)
- {
- return visitor.visitExtensionElement(this);
- }
-
-
- }