/*
* Copyright (C) 2007 The Android Open Source Project
*
* 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 org.apache.harmony.xml.dom;
import java.util.ArrayList;
import java.util.List;
import libcore.util.Objects;
import org.w3c.dom.Attr;
import org.w3c.dom.DOMException;
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;
/**
* Provides a straightforward implementation of the corresponding W3C DOM
* interface. The class is used internally only, thus only notable members that
* are not in the original interface are documented (the W3C docs are quite
* extensive). Hope that's ok.
* <p>
* Some of the fields may have package visibility, so other classes belonging to
* the DOM implementation can easily access them while maintaining the DOM tree
* structure.
*/
public class ElementImpl extends InnerNodeImpl implements Element {
boolean namespaceAware;
String namespaceURI;
String prefix;
String localName;
private List<AttrImpl> attributes = new ArrayList<AttrImpl>();
ElementImpl(DocumentImpl document, String namespaceURI, String qualifiedName) {
super(document);
setNameNS(this, namespaceURI, qualifiedName);
}
ElementImpl(DocumentImpl document, String name) {
super(document);
setName(this, name);
}
private int indexOfAttribute(String name) {
for (int i = 0; i < attributes.size(); i++) {
AttrImpl attr = attributes.get(i);
if (Objects.equal(name, attr.getNodeName())) {
return i;
}
}
return -1;
}
private int indexOfAttributeNS(String namespaceURI, String localName) {
for (int i = 0; i < attributes.size(); i++) {
AttrImpl attr = attributes.get(i);
if (Objects.equal(namespaceURI, attr.getNamespaceURI())
&& Objects.equal(localName, attr.getLocalName())) {
return i;
}
}
return -1;
}
public String getAttribute(String name) {
Attr attr = getAttributeNode(name);
if (attr == null) {
return "";
}
return attr.getValue();
}
public String getAttributeNS(String namespaceURI, String localName) {
Attr attr = getAttributeNodeNS(namespaceURI, localName);
if (attr == null) {
return "";
}
return attr.getValue();
}
public AttrImpl getAttributeNode(String name) {
int i = indexOfAttribute(name);
if (i == -1) {
return null;
}
return attributes.get(i);
}
public AttrImpl getAttributeNodeNS(String namespaceURI, String localName) {
int i = indexOfAttributeNS(namespaceURI, localName);
if (i == -1) {
return null;
}
return attributes.get(i);
}
@Override
public NamedNodeMap getAttributes() {
return new ElementAttrNamedNodeMapImpl();
}
/**
* This implementation walks the entire document looking for an element
* with the given ID attribute. We should consider adding an index to speed
* navigation of large documents.
*/
Element getElementById(String name) {
for (Attr attr : attributes) {
if (attr.isId() && name.equals(attr.getValue())) {
return this;
}
}
/*
* TODO: Remove this behavior.
* The spec explicitly says that this is a bad idea. From
* Document.getElementById(): "Attributes with the name "ID"
* or "id" are not of type ID unless so defined.
*/
if (name.equals(getAttribute("id"))) {
return this;
}
for (NodeImpl node : children) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
Element element = ((ElementImpl) node).getElementById(name);
if (element != null) {
return element;
}
}
}
return null;
}
public NodeList getElementsByTagName(String name) {
NodeListImpl result = new NodeListImpl();
getElementsByTagName(result, name);
return result;
}
public NodeList getElementsByTagNameNS(String namespaceURI, String localName) {
NodeListImpl result = new NodeListImpl();
getElementsByTagNameNS(result, namespaceURI, localName);
return result;
}
@Override
public String getLocalName() {
return namespaceAware ? localName : null;
}
@Override
public String getNamespaceURI() {
return namespaceURI;
}
@Override
public String getNodeName() {
return getTagName();
}
public short getNodeType() {
return Node.ELEMENT_NODE;
}
@Override
public String getPrefix() {
return prefix;
}
public String getTagName() {
return prefix != null
? prefix + ":" + localName
: localName;
}
public boolean hasAttribute(String name) {
return indexOfAttribute(name) != -1;
}
public boolean hasAttributeNS(String namespaceURI, String localName) {
return indexOfAttributeNS(namespaceURI, localName) != -1;
}
@Override
public boolean hasAttributes() {
return !attributes.isEmpty();
}
public void removeAttribute(String name) throws DOMException {
int i = indexOfAttribute(name);
if (i != -1) {
attributes.remove(i);
}
}
public void removeAttributeNS(String namespaceURI, String localName)
throws DOMException {
int i = indexOfAttributeNS(namespaceURI, localName);
if (i != -1) {
attributes.remove(i);
}
}
public Attr removeAttributeNode(Attr oldAttr) throws DOMException {
AttrImpl oldAttrImpl = (AttrImpl) oldAttr;
if (oldAttrImpl.getOwnerElement() != this) {
throw new DOMException(DOMException.NOT_FOUND_ERR, null);
}
attributes.remove(oldAttrImpl);
oldAttrImpl.ownerElement = null;
return oldAttrImpl;
}
public void setAttribute(String name, String value) throws DOMException {
Attr attr = getAttributeNode(name);
if (attr == null) {
attr = document.createAttribute(name);
setAttributeNode(attr);
}
attr.setValue(value);
}
public void setAttributeNS(String namespaceURI, String qualifiedName,
String value) throws DOMException {
Attr attr = getAttributeNodeNS(namespaceURI, qualifiedName);
if (attr == null) {
attr = document.createAttributeNS(namespaceURI, qualifiedName);
setAttributeNodeNS(attr);
}
attr.setValue(value);
}
public Attr setAttributeNode(Attr newAttr) throws DOMException {
AttrImpl newAttrImpl = (AttrImpl) newAttr;
if (newAttrImpl.document != this.document) {
throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, null);
}
if (newAttrImpl.getOwnerElement() != null) {
throw new DOMException(DOMException.INUSE_ATTRIBUTE_ERR, null);
}
AttrImpl oldAttrImpl = null;
int i = indexOfAttribute(newAttr.getName());
if (i != -1) {
oldAttrImpl = attributes.get(i);
attributes.remove(i);
}
attributes.add(newAttrImpl);
newAttrImpl.ownerElement = this;
return oldAttrImpl;
}
public Attr setAttributeNodeNS(Attr newAttr) throws DOMException {
AttrImpl newAttrImpl = (AttrImpl) newAttr;
if (newAttrImpl.document != this.document) {
throw new DOMException(DOMException.WRONG_DOCUMENT_ERR, null);
}
if (newAttrImpl.getOwnerElement() != null) {
throw new DOMException(DOMException.INUSE_ATTRIBUTE_ERR, null);
}
AttrImpl oldAttrImpl = null;
int i = indexOfAttributeNS(newAttr.getNamespaceURI(), newAttr.getLocalName());
if (i != -1) {
oldAttrImpl = attributes.get(i);
attributes.remove(i);
}
attributes.add(newAttrImpl);
newAttrImpl.ownerElement = this;
return oldAttrImpl;
}
@Override
public void setPrefix(String prefix) {
this.prefix = validatePrefix(prefix, namespaceAware, namespaceURI);
}
public class ElementAttrNamedNodeMapImpl implements NamedNodeMap {
public int getLength() {
return ElementImpl.this.attributes.size();
}
private int indexOfItem(String name) {
return ElementImpl.this.indexOfAttribute(name);
}
private int indexOfItemNS(String namespaceURI, String localName) {
return ElementImpl.this.indexOfAttributeNS(namespaceURI, localName);
}
public Node getNamedItem(String name) {
return ElementImpl.this.getAttributeNode(name);
}
public Node getNamedItemNS(String namespaceURI, String localName) {
return ElementImpl.this.getAttributeNodeNS(namespaceURI, localName);
}
public Node item(int index) {
return ElementImpl.this.attributes.get(index);
}
public Node removeNamedItem(String name) throws DOMException {
int i = indexOfItem(name);
if (i == -1) {
throw new DOMException(DOMException.NOT_FOUND_ERR, null);
}
return ElementImpl.this.attributes.remove(i);
}
public Node removeNamedItemNS(String namespaceURI, String localName)
throws DOMException {
int i = indexOfItemNS(namespaceURI, localName);
if (i == -1) {
throw new DOMException(DOMException.NOT_FOUND_ERR, null);
}
return ElementImpl.this.attributes.remove(i);
}
public Node setNamedItem(Node arg) throws DOMException {
if (!(arg instanceof Attr)) {
throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, null);
}
return ElementImpl.this.setAttributeNode((Attr)arg);
}
public Node setNamedItemNS(Node arg) throws DOMException {
if (!(arg instanceof Attr)) {
throw new DOMException(DOMException.HIERARCHY_REQUEST_ERR, null);
}
return ElementImpl.this.setAttributeNodeNS((Attr)arg);
}
}
public TypeInfo getSchemaTypeInfo() {
// TODO: populate this when we support XML Schema
return NULL_TYPE_INFO;
}
public void setIdAttribute(String name, boolean isId) throws DOMException {
AttrImpl attr = getAttributeNode(name);
if (attr == null) {
throw new DOMException(DOMException.NOT_FOUND_ERR,
"No such attribute: " + name);
}
attr.isId = isId;
}
public void setIdAttributeNS(String namespaceURI, String localName,
boolean isId) throws DOMException {
AttrImpl attr = getAttributeNodeNS(namespaceURI, localName);
if (attr == null) {
throw new DOMException(DOMException.NOT_FOUND_ERR,
"No such attribute: " + namespaceURI + " " + localName);
}
attr.isId = isId;
}
public void setIdAttributeNode(Attr idAttr, boolean isId) throws DOMException {
((AttrImpl) idAttr).isId = isId;
}
}