/*
* ForEach.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.extensions;
import com.xmlcalabash.core.XProcConstants;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.model.DeclareStep;
import com.xmlcalabash.model.Environment;
import com.xmlcalabash.model.Input;
import com.xmlcalabash.model.Output;
import net.sf.saxon.s9api.XdmNode;
/**
*
* @author ndw
*/
public class UntilUnchanged extends DeclareStep {
private Output output = null;
/** Creates a new instance of UntilUnchanged */
public UntilUnchanged(XProcRuntime xproc, XdmNode node, String name) {
super(xproc, node, name);
declaration = this;
stepType = XProcConstants.cx_until_unchanged;
Output current = new Output(xproc, node);
current.setPort("#current");
current.setSequence(true);
addOutput(current);
}
public boolean isPipeline() {
return false;
}
public DeclareStep getDeclaration() {
return declaration;
}
public void addOutput(Output output) {
if (this.output != null) {
throw new XProcException(output.getNode(), "cx:until-unchanged can have only a single output port: " + output.getPort());
}
if (!"#current".equals(output.getPort())) {
this.output = output;
}
super.addOutput(output);
}
@Override
public boolean loops() {
return true;
}
@Override
protected void augmentIO() {
if (getInput("#iteration-source") == null) {
Input isource = new Input(runtime, node);
isource.setPort("#iteration-source");
isource.setPrimary(true);
isource.setSequence(true);
addInput(isource);
}
super.augmentIO();
}
public Output getOutput(String portName) {
if ("current".equals(portName)) {
return getOutput("#current");
} else {
return super.getOutput(portName);
}
}
public void patchEnvironment(Environment env) {
env.setDefaultReadablePort(getOutput("#current"));
}
}