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/*
* AddAttribute.java
*
* Copyright 2008 Mark Logic Corporation.
* Portions Copyright 2007 Sun Microsystems, Inc.
* All rights reserved.
*
* The contents of this file are subject to the terms of either the GNU
* General Public License Version 2 only ("GPL") or the Common
* Development and Distribution License("CDDL") (collectively, the
* "License"). You may not use this file except in compliance with the
* License. You can obtain a copy of the License at
* https://xproc.dev.java.net/public/CDDL+GPL.html or
* docs/CDDL+GPL.txt in the distribution. See the License for the
* specific language governing permissions and limitations under the
* License. When distributing the software, include this License Header
* Notice in each file and include the License file at docs/CDDL+GPL.txt.
*/
package com.xmlcalabash.library;
import com.xmlcalabash.core.XMLCalabash;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.model.RuntimeValue;
import com.xmlcalabash.util.ProcessMatchingNodes;
import com.xmlcalabash.util.ProcessMatch;
import com.xmlcalabash.io.ReadablePipe;
import com.xmlcalabash.io.WritablePipe;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.XdmNode;
import net.sf.saxon.s9api.XdmSequenceIterator;
import net.sf.saxon.s9api.Axis;
import com.xmlcalabash.runtime.XAtomicStep;
import javax.xml.XMLConstants;
import java.util.Hashtable;
/**
*
* @author ndw
*/
@XMLCalabash(
name = "p:add-attribute",
type = "{http://www.w3.org/ns/xproc}add-attribute")
public class AddAttribute extends DefaultStep implements ProcessMatchingNodes {
private static final QName _match = new QName("", "match");
private static final QName _attribute_name = new QName("", "attribute-name");
private static final QName _attribute_value = new QName("", "attribute-value");
private static final QName _attribute_prefix = new QName("", "attribute-prefix");
private static final QName _attribute_namespace = new QName("", "attribute-namespace");
private QName attrName = null;
private String attrValue = null;
private ProcessMatch matcher = null;
private ReadablePipe source = null;
private WritablePipe result = null;
/*
* Creates a new instance of AddAttribute
*/
public AddAttribute(XProcRuntime runtime, XAtomicStep step) {
super(runtime,step);
}
public void setInput(String port, ReadablePipe pipe) {
source = pipe;
}
public void setOutput(String port, WritablePipe pipe) {
result = pipe;
}
public void reset() {
source.resetReader();
result.resetWriter();
}
public void run() throws SaxonApiException {
super.run();
RuntimeValue attrNameValue = getOption(_attribute_name);
String attrNameStr = attrNameValue.getString();
String apfx = getOption(_attribute_prefix, (String) null);
String ans = getOption(_attribute_namespace, (String) null);
if (apfx != null && ans == null) {
throw XProcException.dynamicError(34, step, "You can't specify a prefix without a namespace");
}
if (ans != null && attrNameStr.contains(":")) {
throw XProcException.dynamicError(34, step, "You can't specify a namespace if the attribute name contains a colon");
}
if (attrNameStr.contains(":")) {
attrName = new QName(attrNameStr, attrNameValue.getNode());
} else {
attrName = new QName(apfx == null ? "" : apfx, ans, attrNameStr);
}
attrValue = getOption(_attribute_value).getString();
if ("xmlns".equals(attrName.getLocalName())
|| "xmlns".equals(attrName.getPrefix())
|| XMLConstants.XMLNS_ATTRIBUTE_NS_URI.equals(attrName.getNamespaceURI())
|| (!"xml".equals(attrName.getPrefix())
&& XMLConstants.XML_NS_URI.equals(attrName.getNamespaceURI()))
|| ("xml".equals(attrName.getPrefix())
&& !XMLConstants.XML_NS_URI.equals(attrName.getNamespaceURI()))) {
throw XProcException.stepError(59);
}
matcher = new ProcessMatch(runtime, this);
try {
matcher.match(source.read(), getOption(_match));
} catch (XProcException e) {
throw new XProcException(step, "Failed to apply match pattern: " + getOption(_match).getString(), e);
}
result.write(matcher.getResult());
}
public boolean processStartDocument(XdmNode node) throws SaxonApiException {
throw XProcException.stepError(13);
}
public void processEndDocument(XdmNode node) throws SaxonApiException {
throw XProcException.stepError(13);
}
public boolean processStartElement(XdmNode node) throws SaxonApiException {
// We're going to have to loop through the attributes several times, so let's grab 'em
Hashtable attrs = new Hashtable ();
XdmSequenceIterator iter = node.axisIterator(Axis.ATTRIBUTE);
while (iter.hasNext()) {
XdmNode child = (XdmNode) iter.next();
String value = child.getStringValue();
if (!child.getNodeName().equals(attrName)) {
attrs.put(child.getNodeName(), value);
}
}
QName instanceAttrName = attrName;
if (attrName.getNamespaceURI() != null && !"".equals(attrName.getNamespaceURI())) {
// If the requested prefix is already bound to something else, drop it
String prefix = attrName.getPrefix();
for (QName attr : attrs.keySet()) {
if (prefix.equals(attr.getPrefix())
&& !attrName.getNamespaceURI().equals(attr.getNamespaceURI())) {
prefix = "";
}
}
// If there isn't a prefix, we have to make one up
if ("".equals(prefix)) {
int acount = 0;
String aprefix = "_0";
boolean done = false;
while (!done) {
acount++;
aprefix = "_" + acount;
done = true;
for (QName attr : attrs.keySet()) {
if (aprefix.equals(attr.getPrefix())) {
done = false;
}
}
}
instanceAttrName = new QName(aprefix, attrName.getNamespaceURI(), attrName.getLocalName());
}
}
// Now put the "new" one in, with it's instance-valid QName
attrs.put(instanceAttrName, attrValue);
matcher.addStartElement(node);
for (QName attr : attrs.keySet()) {
matcher.addAttribute(attr, attrs.get(attr));
}
return true;
}
public void processEndElement(XdmNode node) throws SaxonApiException {
matcher.addEndElement();
}
public void processText(XdmNode node) throws SaxonApiException {
throw XProcException.stepError(23);
}
public void processComment(XdmNode node) throws SaxonApiException {
throw XProcException.stepError(23);
}
public void processPI(XdmNode node) throws SaxonApiException {
throw XProcException.stepError(23);
}
public void processAttribute(XdmNode node) throws SaxonApiException {
throw XProcException.stepError(23);
}
}
