com.marklogic.dom.ElementImpl Maven / Gradle / Ivy
/*
* Copyright (c) 2019 MarkLogic Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.marklogic.dom;
import java.util.ArrayList;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.TypeInfo;
import com.marklogic.tree.ExpandedTree;
import com.marklogic.tree.NodeKind;
/**
* A read-only W3C DOM Node implementation of MarkLogic's internal
* representation of a document element as stored in the expanded tree cache of
* a forest on disk.
*
*
* This interface is effectively read-only: Setters and update methods inherited
* from org.w3c.Node are not supported and will raise an exception
* if called.
*
*
* @author jchen
*/
public class ElementImpl extends NodeImpl implements Element {
public static final Log LOG = LogFactory.getLog(ElementImpl.class);
protected AttributeNodeMapImpl attributes;
protected int numNSDecl;
public ElementImpl(ExpandedTree tree, int node) {
super(tree, node);
attributes = new AttributeNodeMapImpl(this);
numNSDecl = -1;
}
protected Node cloneNode(Document doc, boolean deep) {
Element elem = doc.createElementNS(getNamespaceURI(), getTagName());
elem.setPrefix(getPrefix());
for (int i = 0; i < attributes.getLength(); i++) {
Attr attr = (Attr) attributes.item(i);
if (attr instanceof AttrImpl) {
elem.setAttributeNode((Attr) ((AttrImpl) attr).cloneNode(doc,
deep));
} else {
// ns decl, stored as Java DOM Attr
// uri of xmlns is "http://www.w3.org/2000/xmlns/"
Attr clonedAttr = doc.createAttributeNS(
"http://www.w3.org/2000/xmlns/", attr.getName());
clonedAttr.setValue(attr.getValue());
elem.setAttributeNode(clonedAttr);
}
}
if (deep) {
// clone children
NodeList list = getChildNodes();
for (int i = 0; i < list.getLength(); i++) {
NodeImpl n = (NodeImpl) list.item(i);
Node c = n.cloneNode(doc, true);
elem.appendChild(c);
}
}
return elem;
}
/** {@inheritDoc} */
public String getAttribute(String name) {
Attr attr = getAttributeNode(name);
return attr==null?"":attr.getValue();
}
/** {@inheritDoc} */
public Attr getAttributeNode(String name) {
return (attributes==null)?null:(Attr)(attributes.getNamedItem(name));
}
/** {@inheritDoc} */
public Attr getAttributeNodeNS(String namespaceURI, String localName){
return (attributes==null)?null:(AttrImpl)getAttributes().getNamedItemNS(namespaceURI,
localName);
}
/** {@inheritDoc} */
public String getAttributeNS(String namespaceURI, String localName) {
if (attributes==null) return "";
AttrImpl attr =
(AttrImpl) getAttributes().getNamedItemNS(namespaceURI,localName);
return attr==null?"":attr.getValue();
}
/**
* {@inheritDoc}
*
* Attributes returned contains default attributes enforced by XML Schema in MarkLogic.
*
*/
@Override
public NamedNodeMap getAttributes() {
return attributes;
}
/** {@inheritDoc} */
@Override
public NodeList getChildNodes() {
return new NodeList() {
public int getLength() {
return tree.elemNodeNumChildren[tree.nodeRepID[node]];
}
public Node item(int index) {
return (index < getLength()) ? tree
.node(tree.elemNodeChildNodeRepID[tree.nodeRepID[node]]
+ index) : null;
}
};
}
/** {@inheritDoc} */
@Override
public boolean isDefaultNamespace(String namespaceURI) {
String namespace = this.getNamespaceURI();
String prefix = this.getPrefix();
if (prefix == null || prefix.length() == 0) {
if (namespaceURI == null) {
return (namespace == namespaceURI);
}
return namespaceURI.equals(namespace);
}
if (this.hasAttributes()) {
Attr attr = this.getAttributeNodeNS(
"http://www.w3.org/2000/xmlns/", "xmlns");
if (attr != null) {
String value = attr.getNodeValue();
if (namespaceURI == null) {
return (namespace == value);
}
return namespaceURI.equals(value);
}
}
Node ancestor = getParentNode();
if (ancestor != null) {
short type = ancestor.getNodeType();
if (type == NodeKind.ELEM) {
return ancestor.isDefaultNamespace(namespaceURI);
}
// otherwise, current node is root already
}
return false;
}
/** {@inheritDoc} */
public NodeList getElementsByTagNameNS(String namespaceURI, String name) {
return getElementsByTagNameNSOrNodeName(namespaceURI, name, false);
}
/** {@inheritDoc} */
public NodeList getElementsByTagName(String localName) {
return getElementsByTagNameNSOrNodeName(null, localName, true);
}
protected int getNumChildren() {
return tree.elemNodeNumChildren[tree.nodeRepID[node]];
}
protected int getFirstChildIndex() {
return tree.elemNodeChildNodeRepID[tree.nodeRepID[node]];
}
public Node getFirstChild() {
return tree.node(getFirstChildIndex());
}
@Override
public Node getLastChild() {
return tree.node(tree.elemNodeChildNodeRepID[tree.nodeRepID[node]]
+ tree.elemNodeNumChildren[tree.nodeRepID[node]] - 1);
}
@Override
public String getLocalName() {
return tree
.atomString(tree.nodeNameNameAtom[tree.elemNodeNodeNameRepID[tree.nodeRepID[node]]]);
}
@Override
public String getNamespaceURI() {
return tree
.atomString(tree.nodeNameNamespaceAtom[tree.elemNodeNodeNameRepID[tree.nodeRepID[node]]]);
}
@Override
public Node getNextChild(int child) {
return (child - tree.elemNodeChildNodeRepID[tree.nodeRepID[node]] + 1 < tree.elemNodeNumChildren[tree.nodeRepID[node]]) ? tree
.node(child + 1) : null;
}
@Override
public String getNodeName() {
String ns = getPrefix();
return ns == null || ns.equals("") ? getTagName() : ns + ":"
+ getTagName();
}
protected int getPrefixID(int uriAtom) {
int a = -1;
boolean useDefaultNS = true;
ArrayList ubp = new ArrayList();
long minOrdinal = 0;
for (int ns = getNSNodeID(tree.nodeOrdinal[node]); ns >= 0; ns = nextNSNodeID(
ns, minOrdinal)) {
int uri = tree.nsNodeUriAtom[ns];
int prefix = tree.nsNodePrefixAtom[ns];
if (tree.atomString(uri) == null) {
ubp.add(prefix);
continue;
}
if (uri != uriAtom) {
useDefaultNS &= (tree.atomString(prefix) != null);
continue;
}
if (ubp.contains(prefix))
continue;
if (tree.atomString(prefix) != null) {
if (a == -1)
a = prefix;
continue;
}
if (useDefaultNS)
return prefix;
}
return a;
}
public int getNumNSDecl() {
if (numNSDecl != -1)
return numNSDecl;
numNSDecl = 0;
long minOrdinal = tree.nodeOrdinal[node];
for (int ns = getNSNodeID(minOrdinal, minOrdinal); ns >= 0; ns = nextNSNodeID(
ns, minOrdinal)) {
numNSDecl++;
}
return numNSDecl;
}
@Override
public String getPrefix() {
int ns = tree.nodeNameNamespaceAtom[tree.elemNodeNodeNameRepID[tree.nodeRepID[node]]];
if (ns < 0)
return null;
String preserved = builtinNSPrefix(getNamespaceURI());
if (preserved != null)
return preserved;
if (tree.atomString(ns) != null)
ns = getPrefixID(ns);
String r = (ns >= 0) ? tree.atomString(ns) : null;
return r;
}
@Override
protected Node getPreviousChild(int child) {
return (child != tree.elemNodeChildNodeRepID[tree.nodeRepID[node]]) ? tree
.node(child - 1) : null;
}
public TypeInfo getSchemaTypeInfo() {
return null;
}
public String getTagName() {
return tree
.atomString(tree.nodeNameNameAtom[tree.elemNodeNodeNameRepID[tree.nodeRepID[node]]]);
}
public boolean hasAttribute(String name) {
return (getAttributes().getNamedItem(name) != null);
}
public boolean hasAttributeNS(String namespaceURI, String localName)
throws DOMException {
return (getAttributes().getNamedItemNS(namespaceURI, localName) != null);
}
public boolean hasAttributes() {
return getAttributes().getLength() > 0;
}
@Override
public boolean hasChildNodes() {
return getChildNodes().getLength() > 0;
}
// The following page gives algorithm for the following functions
// http://www.w3.org/TR/DOM-Level-3-Core/namespaces-algorithms.html#lookupNamespacePrefixAlgo
@Override
public String lookupNamespaceURI(String prefix) {
if (prefix == null)
return null;
if (prefix.equals(getPrefix()))
return getNamespaceURI();
long minOrdinal = 0;
for (int ns = getNSNodeID(tree.nodeOrdinal[node]); ns >= 0; ns = nextNSNodeID(
ns, minOrdinal)) {
int uri = tree.nsNodeUriAtom[ns];
int pf = tree.nsNodePrefixAtom[ns];
if (tree.atomString(uri) == null)
continue;
if (prefix.equals(tree.atomString(pf)))
return tree.atomString(uri);
}
return null;
}
@Override
public String lookupPrefix(String namespaceURI) {
if (namespaceURI == null)
return null;
if (namespaceURI.equals(getNamespaceURI()))
return getPrefix();
long minOrdinal = 0;
for (int ns = getNSNodeID(tree.nodeOrdinal[node]); ns >= 0; ns = nextNSNodeID(
ns, minOrdinal)) {
int uri = tree.nsNodeUriAtom[ns];
int pf = tree.nsNodePrefixAtom[ns];
if (tree.atomString(pf) == null)
continue;
if (namespaceURI.equals(tree.atomString(uri)))
return tree.atomString(pf);
}
return null;
}
/** Unsupported. */
public void removeAttribute(String name) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public Attr removeAttributeNode(Attr oldAttr) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public void removeAttributeNS(String namespaceURI, String localName)
throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public void setAttribute(String name, String value) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public Attr setAttributeNode(Attr newAttr) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public Attr setAttributeNodeNS(Attr newAttr) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public void setAttributeNS(String namespaceURI, String qualifiedName,
String value) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public void setIdAttribute(String name, boolean isId) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public void setIdAttributeNode(Attr idAttr, boolean isId)
throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
/** Unsupported. */
public void setIdAttributeNS(String namespaceURI, String localName,
boolean isId) throws DOMException {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR, null);
}
}