/*
* 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 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;
/**
* 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 {
private boolean namespaceAware;
private String namespaceURI;
private String prefix;
private String localName;
private List<AttrImpl> attributes = new ArrayList<AttrImpl>();
ElementImpl(DocumentImpl document, String namespaceURI, String qualifiedName) {
super(document);
this.namespaceAware = true;
this.namespaceURI = namespaceURI;
if (qualifiedName == null || "".equals(qualifiedName)) {
throw new DOMException(DOMException.NAMESPACE_ERR, qualifiedName);
}
int p = qualifiedName.lastIndexOf(":");
if (p != -1) {
setPrefix(qualifiedName.substring(0, p));
qualifiedName = qualifiedName.substring(p + 1);
}
if (!document.isXMLIdentifier(qualifiedName)) {
throw new DOMException(DOMException.INVALID_CHARACTER_ERR, qualifiedName);
}
this.localName = qualifiedName;
}
ElementImpl(DocumentImpl document, String name) {
super(document);
this.namespaceAware = false;
int p = name.lastIndexOf(":");
if (p != -1) {
String prefix = name.substring(0, p);
String localName = name.substring(p + 1);
if (!document.isXMLIdentifier(prefix) || !document.isXMLIdentifier(localName)) {
throw new DOMException(DOMException.INVALID_CHARACTER_ERR, name);
}
} else {
if (!document.isXMLIdentifier(name)) {
throw new DOMException(DOMException.INVALID_CHARACTER_ERR, name);
}
}
this.localName = name;
}
private int indexOfAttribute(String name) {
for (int i = 0; i < attributes.size(); i++) {
AttrImpl attr = attributes.get(i);
if (attr.matchesName(name, false)) {
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 (attr.matchesNameNS(namespaceURI, localName, false)) {
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 Attr getAttributeNode(String name) {
int i = indexOfAttribute(name);
if (i == -1) {
return null;
}
return attributes.get(i);
}
public Attr 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();
}
Element getElementById(String name) {
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 list = new NodeListImpl();
getElementsByTagName(list, name);
return list;
}
void getElementsByTagName(NodeListImpl list, String name) {
if (matchesName(name, true)) {
list.add(this);
}
for (NodeImpl node : children) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
((ElementImpl) node).getElementsByTagName(list, name);
}
}
}
public NodeList getElementsByTagNameNS(String namespaceURI, String localName) {
NodeListImpl list = new NodeListImpl();
getElementsByTagNameNS(list, namespaceURI, localName);
return list;
}
void getElementsByTagNameNS(NodeListImpl list, String namespaceURI,
String localName) {
if (matchesNameNS(namespaceURI, localName, true)) {
list.add(this);
}
for (NodeImpl node : children) {
if (node.getNodeType() == Node.ELEMENT_NODE) {
((ElementImpl) node).getElementsByTagNameNS(list, namespaceURI,
localName);
}
}
}
@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;
}
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(oldAttr);
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.getOwnerDocument()) {
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.getOwnerDocument()) {
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) {
if (!namespaceAware) {
throw new DOMException(DOMException.NAMESPACE_ERR, prefix);
}
if (prefix != null) {
if (namespaceURI == null || !document.isXMLIdentifier(prefix)) {
throw new DOMException(DOMException.NAMESPACE_ERR, prefix);
}
if ("xml".equals(prefix) && !"http://www.w3.org/XML/1998/namespace".equals(namespaceURI)) {
throw new DOMException(DOMException.NAMESPACE_ERR, prefix);
}
}
this.prefix = prefix;
}
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);
}
}
}