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eXist NoSQL Database EXPath Modules
/*
* eXist-db Open Source Native XML Database
* Copyright (C) 2001 The eXist-db Authors
*
* [email protected]
* http://www.exist-db.org
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package org.expath.tools.model.exist;
import java.util.*;
import org.exist.xquery.XPathException;
import org.exist.xquery.XQueryContext;
import org.exist.xquery.value.NodeValue;
import org.exist.xquery.value.ValueSequence;
import org.expath.httpclient.HttpConstants;
import org.expath.tools.ToolsException;
import org.expath.tools.model.Attribute;
import org.expath.tools.model.Element;
import org.expath.tools.model.Sequence;
import org.w3c.dom.Attr;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import javax.xml.XMLConstants;
import javax.xml.namespace.QName;
/**
* @author Adam Retter
*/
public class EXistElement implements Element {
private final NodeValue element;
private final XQueryContext context;
public EXistElement(final NodeValue element, final XQueryContext context) {
this.element = element;
this.context = context;
}
@Override
public Iterable attributes() {
return () -> new Iterator() {
private final NamedNodeMap attrs = element.getNode().getAttributes();
private final int length = attrs.getLength();
private int position = 0;
@Override
public boolean hasNext() {
return(position < length);
}
@Override
public Attribute next() {
if(position >= length){
throw new NoSuchElementException();
}
return new EXistAttribute((Attr)attrs.item(position++));
}
@Override
public void remove() {
throw new UnsupportedOperationException("Not supported yet.");
}
};
}
@Override
public Iterable children() {
final Node node = element.getNode();
return new IterableElement(node);
}
@Override
public String getAttribute(final String local_name) {
String attrValue = null;
final NamedNodeMap attrs = element.getNode().getAttributes();
final Node attr = attrs.getNamedItem(local_name);
if(attr != null) {
attrValue = ((Attr)attr).getValue();
}
return attrValue;
}
@Override
public Sequence getContent() {
final org.exist.xquery.value.Sequence valueSequence = new ValueSequence();
final NodeList children = element.getNode().getChildNodes();
try {
for(int i = 0; i < children.getLength(); i++) {
final Node child = children.item(i);
valueSequence.add((NodeValue)child);
}
return new EXistSequence(valueSequence, context);
} catch(final XPathException xpe) {
throw new RuntimeException(xpe.getMessage(), xpe);
}
}
@Override
public String getDisplayName() {
return element.getNode().getNodeName();
}
@Override
public String getLocalName() {
return element.getNode().getLocalName();
}
@Override
public String getNamespaceUri() {
return element.getNode().getNamespaceURI();
}
@Override
public boolean hasNoNsChild() {
final NodeList children = element.getNode().getChildNodes();
for(int i = 0; i < children.getLength(); i++) {
final Node child = children.item(i);
if(child.getNamespaceURI() == null && child.getPrefix() == null || child.getNamespaceURI().equals(XMLConstants.NULL_NS_URI)) {
return true;
}
}
return false;
}
@Override
public Iterable children(final String ns) {
final Node node = element.getNode();
return new IterableElement(node, ns);
}
@Override
public void noOtherNCNameAttribute(final String[] names, String[] forbidden_ns) throws ToolsException {
if ( forbidden_ns == null ) {
forbidden_ns = new String[] { };
}
final String[] sorted_names = sortCopy(names);
final String[] sorted_ns = sortCopy(forbidden_ns);
final NamedNodeMap attributes = element.getNode().getAttributes();
for(int i = 0; i < attributes.getLength(); i++) {
final Node attr = attributes.item(i);
final String attr_name = attr.getLocalName();
final String ns = attr.getNamespaceURI();
if( ns != null && Arrays.binarySearch(sorted_ns, ns) >= 0 ) {
if(ns.equals(HttpConstants.HTTP_CLIENT_NS_URI)) {
throw new ToolsException("@" + attr_name + " in namespace " + ns + " not allowed on " + getDisplayName());
}
} else if (ns!= null && ! ns.isEmpty() ) {
// ignore other-namespace-attributes
} else if ( Arrays.binarySearch(sorted_names, attr.getLocalName()) < 0 ) {
throw new ToolsException("@" + attr_name + " not allowed on " + getDisplayName());
}
}
}
private String[] sortCopy(final String[] array)
{
final String[] sorted = new String[array.length];
System.arraycopy(array, 0, sorted, 0, sorted.length);
Arrays.sort(sorted);
return sorted;
}
@Override
public QName parseQName(final String value)
throws ToolsException
{
try {
final org.exist.dom.QName qn = org.exist.dom.QName.parse(context, value, element.getQName().getNamespaceURI());
return qn.toJavaQName();
}
catch ( final org.exist.dom.QName.IllegalQNameException ex ) {
throw new ToolsException("Error parsing the literal QName: " + value, ex);
}
}
public class IterableElement implements Iterable {
private final Node node;
private String inNamespaceURI = null;
public IterableElement(Node node) {
this.node = node;
}
public IterableElement(Node node, String inNamespaceURI) {
this.node = node;
this.inNamespaceURI = inNamespaceURI;
}
@Override
public Iterator iterator() {
return new ElementIterator(node, inNamespaceURI);
}
}
public class ElementIterator implements Iterator {
private final Node parent;
private final String inNamespaceURI;
private List elements = null;
private int position = 0;
public ElementIterator(Node parent, String inNamespaceURI) {
this.parent = parent;
this.inNamespaceURI = inNamespaceURI;
}
@Override
public boolean hasNext() {
return(position < getLength());
}
@Override
public Element next() {
if(position >= getLength()){
throw new NoSuchElementException();
}
return new EXistElement((NodeValue)getElements().get(position++), context);
}
@Override
public void remove() {
throw new UnsupportedOperationException("Not supported yet.");
}
private int getLength() {
return getElements().size();
}
/**
* lazy initialised
*/
private List getElements() {
if(elements == null) {
elements = new ArrayList<>();
final NodeList children = parent.getChildNodes();
for(int i = 0; i < children.getLength(); i++) {
final Node child = children.item(i);
if(child.getNodeType() == Node.ELEMENT_NODE) {
if(inNamespaceURI != null) {
final String ns = child.getNamespaceURI();
if(ns != null && inNamespaceURI.equals(ns)){
elements.add((org.w3c.dom.Element)child);
}
} else {
elements.add((org.w3c.dom.Element)child);
}
}
}
}
return elements;
}
}
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