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com.xmlcalabash.runtime.XTry Maven / Gradle / Ivy
package com.xmlcalabash.runtime;
import com.xmlcalabash.core.XProcRuntime;
import com.xmlcalabash.core.XProcConstants;
import com.xmlcalabash.core.XProcException;
import com.xmlcalabash.util.MessageFormatter;
import com.xmlcalabash.util.TreeWriter;
import com.xmlcalabash.util.XProcMessageListenerHelper;
import com.xmlcalabash.io.WritablePipe;
import com.xmlcalabash.model.*;
import net.sf.saxon.om.StructuredQName;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.XdmNode;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.trans.XPathException;
import javax.xml.transform.SourceLocator;
import javax.xml.transform.TransformerException;
import java.util.Vector;
/**
* Created by IntelliJ IDEA.
* User: ndw
* Date: Oct 13, 2008
* Time: 7:40:35 PM
* To change this template use File | Settings | File Templates.
*/
public class XTry extends XCompoundStep {
private static final String NS_DAISY_PIPELINE_XPROC = "http://www.daisy.org/ns/pipeline/xproc";
private static final QName c_errors = new QName("c", XProcConstants.NS_XPROC_STEP, "errors");
private static final QName c_error = new QName("c", XProcConstants.NS_XPROC_STEP, "error");
private static final QName px_location = new QName("px", NS_DAISY_PIPELINE_XPROC, "location");
private static final QName px_file = new QName("px", NS_DAISY_PIPELINE_XPROC, "file");
private static final QName px_cause = new QName("px", NS_DAISY_PIPELINE_XPROC, "cause");
private static QName _href = new QName("", "href");
private static QName _line = new QName("", "line");
private static QName _column = new QName("", "column");
private static QName _code = new QName("", "code");
private Vector errors = new Vector ();
public XTry(XProcRuntime runtime, Step step, XCompoundStep parent) {
super(runtime, step, parent);
}
public void instantiate(Step step) {
parent.addStep(this);
DeclareStep decl = step.getDeclaration();
for (Step substep : decl.subpipeline()) {
if (XProcConstants.p_group.equals(substep.getType())) {
XGroup newstep = new XGroup(runtime, substep, this);
newstep.instantiate(substep);
} else if (XProcConstants.p_catch.equals(substep.getType())) {
XCatch newstep = new XCatch(runtime, substep, this);
newstep.instantiate(substep);
} else {
throw new XProcException(step.getNode(), "This can't happen, can it? try contains something that isn't a group or a catch?");
}
}
for (Output output : step.outputs()) {
String port = output.getPort();
if (port.endsWith("|")) {
String rport = port.substring(0,port.length()-1);
XInput xinput = getInput(rport);
WritablePipe wpipe = xinput.getWriter();
outputs.put(port, wpipe);
logger.trace(MessageFormatter.nodeMessage(step.getNode(), " writes to " + wpipe + " for " + port));
} else {
XOutput xoutput = new XOutput(runtime, output);
addOutput(xoutput);
WritablePipe wpipe = xoutput.getWriter();
outputs.put(port, wpipe);
logger.trace(MessageFormatter.nodeMessage(step.getNode(), " writes to " + wpipe + " for " + port));
}
}
}
public void run() throws SaxonApiException {
inScopeOptions = parent.getInScopeOptions();
for (Variable var : step.getVariables()) {
RuntimeValue value = computeValue(var);
inScopeOptions.put(var.getName(), value);
}
XGroup xgroup = (XGroup) subpipeline.get(0);
for (String port : inputs.keySet()) {
if (!port.startsWith("|")) {
xgroup.inputs.put(port, inputs.get(port));
}
}
for (String port : outputs.keySet()) {
if (!port.endsWith("|")) {
xgroup.outputs.put(port, outputs.get(port));
}
}
try {
XProcMessageListenerHelper.openStep(runtime, this);
} catch (Throwable e) {
throw handleException(e);
}
try {
xgroup.run();
} catch (Exception xe) {
logger.debug("p:try: caught error: " + xe.toString());
logger.trace("", xe);
TreeWriter treeWriter = new TreeWriter(runtime);
treeWriter.startDocument(step.getNode().getBaseURI());
treeWriter.addStartElement(c_errors);
treeWriter.startContent();
boolean reported = false;
for (XdmNode doc : runtime.getXProcData().errors()) {
treeWriter.addSubtree(doc);
reported = true;
}
for (XdmNode doc : errors) {
treeWriter.addSubtree(doc);
reported = true;
}
if (!reported) {
// Hey, no one reported this exception. We better do it.
serializeError(xe, runtime.runningStep(), treeWriter);
}
treeWriter.addEndElement();
treeWriter.endDocument();
XCatch xcatch = (XCatch) subpipeline.get(1);
xcatch.writeError(treeWriter.getResult());
for (String port : inputs.keySet()) {
if (!port.startsWith("|")) {
xcatch.inputs.put(port, inputs.get(port));
}
}
for (String port : outputs.keySet()) {
if (!port.endsWith("|")) {
xcatch.outputs.put(port, outputs.get(port));
}
}
xcatch.run();
} finally {
runtime.getMessageListener().closeStep();
}
}
private static void serializeError(Throwable xe, XStep step, TreeWriter treeWriter) {
treeWriter.addStartElement(c_error);
StructuredQName qCode = null;
String message = xe.getMessage();
if (xe instanceof XPathException) {
XPathException xxx = (XPathException) xe;
qCode = xxx.getErrorCodeQName();
Throwable underlying = xe.getCause();
if (underlying != null) {
message = underlying.toString();
}
}
if (xe instanceof XProcException) {
XProcException xxx = (XProcException) xe;
QName code = xxx.getErrorCode();
if (code != null) {
qCode = new StructuredQName(code.getPrefix(), code.getNamespaceURI(), code.getLocalName());
}
if (message == null) {
Throwable underlying = xe.getCause();
if (underlying != null && !(underlying instanceof XProcException)) {
message = underlying.getMessage();
}
}
}
if (qCode != null) {
treeWriter.addNamespace(qCode.getPrefix(), qCode.getNamespaceBinding().getURI());
treeWriter.addAttribute(_code, qCode.getDisplayName());
}
if (step != null && step.getNode() != null) {
XdmNode node = step.getNode();
if (node.getBaseURI() != null) {
treeWriter.addAttribute(_href, node.getBaseURI().toString());
}
if (node.getLineNumber() > 0) {
treeWriter.addAttribute(_line, ""+node.getLineNumber());
}
if (node.getColumnNumber() > 0) {
treeWriter.addAttribute(_column, ""+node.getColumnNumber());
}
}
treeWriter.startContent();
if (message != null)
treeWriter.addText(message);
if (xe instanceof XProcException) {
XProcException xxx = (XProcException) xe;
treeWriter.addStartElement(px_location);
treeWriter.startContent();
for (SourceLocator l : xxx.getLocator()) {
treeWriter.addStartElement(px_file);
treeWriter.addAttribute(_href, l.getSystemId());
int line = l.getLineNumber();
if (line > 0)
treeWriter.addAttribute(_line, ""+line);
treeWriter.addEndElement();
}
treeWriter.addEndElement();
XProcException underlying = ((XProcException)xe).getXProcCause();
if (underlying != null) {
treeWriter.addStartElement(px_cause);
treeWriter.startContent();
serializeError(underlying, null, treeWriter);
treeWriter.addEndElement();
}
}
treeWriter.addEndElement();
}
public void reportError(XdmNode doc) {
errors.add(doc);
}
}
