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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2023 Saxonica Limited
// This Source Code Form is subject to the terms of the Mozilla Public License, v. 2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
// This Source Code Form is "Incompatible With Secondary Licenses", as defined by the Mozilla Public License, v. 2.0.
////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
package net.sf.saxon.event;
import net.sf.saxon.Configuration;
import net.sf.saxon.expr.parser.Loc;
import net.sf.saxon.om.FingerprintedQName;
import net.sf.saxon.om.NamespaceUri;
import net.sf.saxon.om.NoNamespaceName;
import net.sf.saxon.om.NodeName;
import net.sf.saxon.s9api.QName;
import net.sf.saxon.s9api.SaxonApiException;
import net.sf.saxon.s9api.push.Container;
import net.sf.saxon.s9api.push.Document;
import net.sf.saxon.s9api.push.Element;
import net.sf.saxon.s9api.push.Push;
import net.sf.saxon.str.StringView;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.type.BuiltInAtomicType;
import net.sf.saxon.type.Untyped;
public class PushToReceiver implements Push {
private final ComplexContentOutputter cco;
private final Configuration config;
public PushToReceiver(Receiver cco) {
this.cco = new ComplexContentOutputter(new RegularSequenceChecker(cco, false));
config = cco.getPipelineConfiguration().getConfiguration();
}
@Override
public Document document(boolean wellFormed) throws SaxonApiException {
try {
cco.open();
} catch (XPathException e) {
throw new SaxonApiException(e);
}
return new DocImpl(cco, wellFormed);
}
private abstract class ContainerImpl implements Container {
private ComplexContentOutputter cco;
private String defaultNamespace;
private ElemImpl elementAwaitingClosure;
private boolean closed;
public ContainerImpl(ComplexContentOutputter cco, String defaultNamespace) {
this.defaultNamespace = defaultNamespace;
this.cco = cco;
}
@Override
public void setDefaultNamespace(String uri) {
this.defaultNamespace = uri;
}
@Override
public Element element(QName name) throws SaxonApiException {
try {
implicitClose();
final FingerprintedQName fp = new FingerprintedQName(
name.getStructuredQName(), getConfiguration().getNamePool());
getOutputter().startElement(fp, Untyped.getInstance(), Loc.NONE, ReceiverOption.NONE);
} catch (XPathException e) {
throw new SaxonApiException(e);
}
return elementAwaitingClosure = new ElemImpl(getOutputter(), defaultNamespace);
}
@Override
public Element element(String name) throws SaxonApiException {
try {
implicitClose();
final NodeName fp = defaultNamespace.isEmpty()
? new NoNamespaceName(name)
: new FingerprintedQName("", NamespaceUri.of(defaultNamespace), name);
cco.startElement(fp, Untyped.getInstance(), Loc.NONE, ReceiverOption.NONE);
} catch (XPathException e) {
throw new SaxonApiException(e);
}
return elementAwaitingClosure = new ElemImpl(getOutputter(), defaultNamespace);
}
@Override
public Container text(CharSequence value) throws SaxonApiException {
try {
implicitClose();
if (value != null && value.length() > 0) {
getOutputter().characters(StringView.of(value.toString()), Loc.NONE, ReceiverOption.NONE);
}
return this;
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
@Override
public Container comment(CharSequence value) throws SaxonApiException {
try {
implicitClose();
if (value != null) {
getOutputter().comment(StringView.of(value.toString()), Loc.NONE, ReceiverOption.NONE);
}
return this;
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
@Override
public Container processingInstruction(String name, CharSequence value) throws SaxonApiException {
try {
implicitClose();
if (value != null) {
getOutputter().processingInstruction(name, StringView.of(value.toString()), Loc.NONE, ReceiverOption.NONE);
}
return this;
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
@Override
public void close() throws SaxonApiException {
if (!closed) {
implicitClose();
sendEndEvent();
closed = true;
}
}
private void implicitClose() throws SaxonApiException {
if (closed) {
throw new SaxonApiException("The container has been closed");
}
if (elementAwaitingClosure != null) {
elementAwaitingClosure.close();
elementAwaitingClosure = null;
}
}
abstract protected void sendEndEvent() throws SaxonApiException;
protected ComplexContentOutputter getOutputter() {
return cco;
}
protected Configuration getConfiguration() {
return cco.getConfiguration();
}
}
private class DocImpl extends ContainerImpl implements Document {
private final boolean wellFormed;
private boolean foundElement = false;
DocImpl(ComplexContentOutputter cco, boolean wellFormed) throws SaxonApiException {
super(cco, "");
try {
this.wellFormed = wellFormed;
cco.startDocument(ReceiverOption.NONE);
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
@Override
public Element element(QName name) throws SaxonApiException {
if (wellFormed && foundElement) {
throw new SaxonApiException("A well-formed document cannot have more than one element child");
}
foundElement = true;
return super.element(name);
}
@Override
public Element element(String name) throws SaxonApiException {
if (wellFormed && foundElement) {
throw new SaxonApiException("A well-formed document cannot have more than one element child");
}
foundElement = true;
return super.element(name);
}
@Override
public DocImpl text(CharSequence value) throws SaxonApiException {
if (wellFormed && value != null && value.length() > 0) {
throw new SaxonApiException("A well-formed document cannot contain text outside any element");
}
return (DocImpl)super.text(value);
}
@Override
public Document comment(CharSequence value) throws SaxonApiException {
return (Document)super.comment(value);
}
@Override
public Document processingInstruction(String name, CharSequence value) throws SaxonApiException {
return (Document)super.processingInstruction(name, value);
}
@Override
protected void sendEndEvent() throws SaxonApiException {
try {
if (wellFormed && !foundElement) {
throw new SaxonApiException("A well-formed document must contain an element node");
}
getOutputter().endDocument();
getOutputter().close();
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
}
private class ElemImpl extends ContainerImpl implements Element {
private boolean foundChild;
ElemImpl(ComplexContentOutputter cco, String defaultNamespace) {
super(cco, defaultNamespace);
}
@Override
public Element attribute(QName name, String value) throws SaxonApiException {
checkChildNotFound();
try {
if (value != null) {
final FingerprintedQName fp =
new FingerprintedQName(name.getStructuredQName(), getConfiguration().getNamePool());
getOutputter().attribute(fp, BuiltInAtomicType.UNTYPED_ATOMIC, value, Loc.NONE, ReceiverOption.NONE);
}
return this;
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
@Override
public Element attribute(String name, String value) throws SaxonApiException {
checkChildNotFound();
try {
if (value != null) {
final NodeName fp = new NoNamespaceName(name);
getOutputter().attribute(fp, BuiltInAtomicType.UNTYPED_ATOMIC, value, Loc.NONE, ReceiverOption.NONE);
}
return this;
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
@Override
public Element namespace(String prefix, String uri) throws SaxonApiException {
checkChildNotFound();
try {
getOutputter().namespace(prefix, NamespaceUri.of(uri), ReceiverOption.NONE);
return this;
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
private void checkChildNotFound() throws SaxonApiException {
if (foundChild) {
throw new SaxonApiException("Attribute nodes must be attached to an element before any children");
}
}
@Override
public Element element(QName name) throws SaxonApiException {
foundChild = true;
return super.element(name);
}
@Override
public Element element(String name) throws SaxonApiException {
foundChild = true;
return super.element(name);
}
@Override
public Element text(CharSequence value) throws SaxonApiException {
foundChild = true;
return (Element)super.text(value);
}
@Override
public Element comment(CharSequence value) throws SaxonApiException {
foundChild = true;
return (Element)super.comment(value);
}
@Override
public Element processingInstruction(String name, CharSequence value) throws SaxonApiException {
foundChild = true;
return (Element)super.processingInstruction(name, value);
}
@Override
protected void sendEndEvent() throws SaxonApiException {
try {
getOutputter().endElement();
} catch (XPathException e) {
throw new SaxonApiException(e);
}
}
}
}