/*
* Compare.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 java.util.Iterator;
import com.xmlcalabash.io.ReadablePipe;
import com.xmlcalabash.io.WritablePipe;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcConstants;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.util.TreeWriter;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.XdmNode;
import net.sf.saxon.s9api.XPathCompiler;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.XPathExecutable;
import net.sf.saxon.s9api.XPathSelector;
import net.sf.saxon.s9api.XdmItem;
import net.sf.saxon.s9api.XdmAtomicValue;
import com.xmlcalabash.runtime.XAtomicStep;
/**
*
* @author ndw
*/
public class Compare extends DefaultStep {
private static final QName c_result = new QName("c", XProcConstants.NS_XPROC_STEP, "result");
private static final QName doca = new QName("","doca");
private static final QName docb = new QName("","docb");
private static final QName _fail_if_not_equal = new QName("","fail-if-not-equal");
private ReadablePipe source = null;
private ReadablePipe alternate = null;
private WritablePipe result = null;
/**
* Creates a new instance of Compare
*/
public Compare(XProcRuntime runtime, XAtomicStep step) {
super(runtime,step);
}
public void setInput(String port, ReadablePipe pipe) {
if ("source".equals(port)) {
source = pipe;
} else {
alternate = pipe;
}
}
public void setOutput(String port, WritablePipe pipe) {
result = pipe;
}
public void reset() {
source.resetReader();
result.resetWriter();
}
public void run() throws SaxonApiException {
super.run();
XdmNode sdoc = source.read();
XdmNode adoc = alternate.read();
XPathCompiler xcomp = runtime.getProcessor().newXPathCompiler();
xcomp.declareVariable(doca);
xcomp.declareVariable(docb);
XPathExecutable xexec = xcomp.compile("deep-equal($doca,$docb)");
XPathSelector selector = xexec.load();
selector.setVariable(doca,sdoc);
selector.setVariable(docb,adoc);
Iterator<XdmItem> values = selector.iterator();
XdmAtomicValue item = (XdmAtomicValue) values.next();
boolean same = item.getBooleanValue();
if (!same && getOption(_fail_if_not_equal,false)) {
throw XProcException.stepError(19);
}
TreeWriter treeWriter = new TreeWriter(runtime);
treeWriter.startDocument(step.getNode().getBaseURI());
treeWriter.addStartElement(c_result);
treeWriter.startContent();
treeWriter.addText(""+same);
treeWriter.addEndElement();
treeWriter.endDocument();
result.write(treeWriter.getResult());
}
}