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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Copyright (c) 2018-2022 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.option.axiom;
import net.sf.saxon.Configuration;
import net.sf.saxon.event.Receiver;
import net.sf.saxon.lib.ActiveSource;
import net.sf.saxon.lib.NamespaceConstant;
import net.sf.saxon.lib.ParseOptions;
import net.sf.saxon.om.GenericTreeInfo;
import net.sf.saxon.om.NodeInfo;
import net.sf.saxon.trans.XPathException;
import net.sf.saxon.tree.iter.AxisIterator;
import org.apache.axiom.om.OMAttribute;
import org.apache.axiom.om.OMDocument;
import org.apache.axiom.om.OMElement;
import org.apache.axiom.om.OMNode;
import java.util.HashMap;
import java.util.Iterator;
/**
* Information about a tree that wraps an AXIOM document
*/
public class AxiomDocument extends GenericTreeInfo implements ActiveSource {
private HashMap idIndex;
/**
* Create a Saxon wrapper for an Axiom document node
*
* @param root The Axiom root node
* @param baseURI The base URI for all the nodes in the tree
* @param config The configuration which defines the name pool used for all
* names in this tree
*/
public AxiomDocument(OMDocument root, String baseURI, Configuration config) {
super(config);
setRootNode(new AxiomDocumentNodeWrapper(root, baseURI, config, this));
setSystemId(baseURI);
}
/**
* Implement ActiveSource by delivering the document to a supplied receiver
* @param receiver the receiver to which events representing the parsed XML document will be sent
* @param options options for parsing the source
* @throws XPathException if things don't work out
*/
@Override
public void deliver(Receiver receiver, ParseOptions options) throws XPathException {
getRootNode().deliver(receiver, options);
}
/**
* Wrap a node in the Axiom document.
*
* @param node The node to be wrapped. This must be a node in the same
* document (the system does not check for this).
* @return the wrapping NodeInfo object
*/
public NodeInfo wrap(OMNode node) {
return makeWrapper(node, this, null, -1);
}
/**
* Factory method to wrap an Axiom node with a wrapper that implements the
* Saxon NodeInfo interface.
*
* @param node The Axiom node (an element, text, processing-instruction, or comment node)
* @param docWrapper The wrapper for the Document containing this node
* @param parent The wrapper for the parent of the Axiom node. May be null if not known.
* @param index The position of this node relative to its siblings. May be -1 if not known
* @return The new wrapper for the supplied node
*/
protected static NodeInfo makeWrapper(OMNode node, AxiomDocument docWrapper,
AxiomParentNodeWrapper parent, int index) {
if (node instanceof OMDocument) {
return docWrapper.getRootNode();
}
if (node instanceof OMElement) {
return new AxiomElementNodeWrapper((OMElement) node, docWrapper, parent, index);
} else {
return new AxiomLeafNodeWrapper(node, docWrapper, parent, index);
}
}
/**
* Get the element with a given ID, if any
*
* @param id the required ID value
* @param getParent true if the parent of the selected node is required (for element-with-id)
* @return the element with the given ID, or null if there is no such ID
* present (or if the parser has not notified attributes as being of
* type ID).
*/
/*@Nullable*/
@Override
public NodeInfo selectID(String id, boolean getParent) {
if (idIndex == null) {
idIndex = new HashMap(50);
AxiomDocumentNodeWrapper doc = (AxiomDocumentNodeWrapper)getRootNode();
OMDocument omDoc = (OMDocument)doc.node;
buildIDIndex(omDoc.getOMDocumentElement());
}
return idIndex.get(id);
}
private void buildIDIndex(OMElement elem) {
for (Iterator kids = elem.getChildElements(); kids.hasNext(); ) {
buildIDIndex((OMElement) kids.next());
}
for (Iterator atts = elem.getAllAttributes(); atts.hasNext(); ) {
OMAttribute att = (OMAttribute) atts.next();
if ("ID".equals(att.getAttributeType()) ||
("id".equals(att.getLocalName()) && NamespaceConstant.XML.equals(att.getNamespaceURI()))) {
String val = att.getAttributeValue();
if (idIndex.get(val) == null) {
// if ID's aren't unique, the first one wins
idIndex.put(val, wrap(elem));
}
}
}
}
protected static class FollowingSiblingIterator implements AxisIterator {
private final OMNode start;
private OMNode currentOMNode;
private final AxiomParentNodeWrapper commonParent;
private final AxiomDocument docWrapper;
public FollowingSiblingIterator(OMNode start, AxiomParentNodeWrapper commonParent, AxiomDocument docWrapper) {
this.start = start;
this.currentOMNode = start;
this.commonParent = commonParent;
this.docWrapper = docWrapper;
}
@Override
public NodeInfo next() {
if (currentOMNode == null) {
return null;
}
currentOMNode = currentOMNode.getNextOMSibling();
if (currentOMNode == null) {
return null;
} else {
return makeWrapper(currentOMNode, docWrapper, commonParent, -1);
}
}
}
protected static class PrecedingSiblingIterator implements AxisIterator {
private final OMNode start;
private OMNode currentOMNode;
private final AxiomParentNodeWrapper commonParent;
private final AxiomDocument docWrapper;
public PrecedingSiblingIterator(OMNode start, AxiomParentNodeWrapper commonParent, AxiomDocument docWrapper) {
this.start = start;
this.currentOMNode = start;
this.commonParent = commonParent;
this.docWrapper = docWrapper;
}
@Override
public NodeInfo next() {
if (currentOMNode == null) {
return null;
}
currentOMNode = currentOMNode.getPreviousOMSibling();
if (currentOMNode == null) {
return null;
} else {
return makeWrapper(currentOMNode, docWrapper, commonParent, -1);
}
}
}
}