/*
* @(#)IIOMetadataNode.java 1.36 02/03/21
*
* Copyright 2004 Sun Microsystems, Inc. All rights reserved.
* SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
*/
package javax.imageio.metadata;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.w3c.dom.Attr;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.DOMException;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;
import org.w3c.dom.NodeList;
import org.w3c.dom.TypeInfo;
import org.w3c.dom.UserDataHandler;
class IIODOMException extends DOMException {
public IIODOMException(short code, String message) {
super(code, message);
}
}
class IIONamedNodeMap implements NamedNodeMap {
List nodes;
public IIONamedNodeMap(List nodes) {
this.nodes = nodes;
}
public int getLength() {
return nodes.size();
}
public Node getNamedItem(String name) {
Iterator iter = nodes.iterator();
while (iter.hasNext()) {
Node node = (Node)iter.next();
if (name.equals(node.getNodeName())) {
return node;
}
}
return null;
}
public Node item(int index) {
Node node = (Node)nodes.get(index);
return node;
}
public Node removeNamedItem(java.lang.String name) {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR,
"This NamedNodeMap is read-only!");
}
public Node setNamedItem(Node arg) {
throw new DOMException(DOMException.NO_MODIFICATION_ALLOWED_ERR,
"This NamedNodeMap is read-only!");
}
/**
* Equivalent to <code>getNamedItem(localName)</code>.
*/
public Node getNamedItemNS(String namespaceURI, String localName) {
return getNamedItem(localName);
}
/**
* Equivalent to <code>setNamedItem(arg)</code>.
*/
public Node setNamedItemNS(Node arg) {
return setNamedItem(arg);
}
/**
* Equivalent to <code>removeNamedItem(localName)</code>.
*/
public Node removeNamedItemNS(String namespaceURI, String localName) {
return removeNamedItem(localName);
}
}
class IIONodeList implements NodeList {
List nodes;
public IIONodeList(List nodes) {
this.nodes = nodes;
}
public int getLength() {
return nodes.size();
}
public Node item(int index) {
if (index < 0 || index > nodes.size()) {
return null;
}
return (Node)nodes.get(index);
}
}
class IIOAttr extends IIOMetadataNode implements Attr {
boolean specified = true;
Element owner;
String name;
String value;
public IIOAttr(Element owner, String name, String value) {
this.owner = owner;
this.name = name;
this.value = value;
}
public String getName() {
return name;
}
public String getNodeName() {
return name;
}
public short getNodeType() {
return ATTRIBUTE_NODE;
}
public boolean getSpecified() {
return specified;
}
public String getValue() {
return value;
}
public String getNodeValue() {
return value;
}
public void setValue(String value) {
this.value = value;
}
public void setNodeValue(String value) {
this.value = value;
}
public Element getOwnerElement() {
return owner;
}
public void setOwnerElement(Element owner) {
this.owner = owner;
}
// Start of dummy methods for DOM L3. PENDING: Please revisit
public boolean isId( ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public TypeInfo getSchemaTypeInfo() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public Object setUserData(String key,
Object data,
UserDataHandler handler) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public Object getUserData ( String key ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public Object getFeature ( String feature, String version ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public boolean isEqualNode( Node node ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public boolean isSameNode( Node node ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public String lookupNamespaceURI( String prefix ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public boolean isDefaultNamespace(String namespaceURI) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public String lookupPrefix(String namespaceURI) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
String textContent;
public String getTextContent() throws DOMException {
return textContent;
}
public void setTextContent(String textContent) throws DOMException{
this.textContent = textContent; //PENDING
}
public short compareDocumentPosition(Node other)
throws DOMException {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public String getBaseURI() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
// End of dummy methods for DOM L3. PENDING: Please revisit
}
/**
* A class representing a node in a meta-data tree, which implements
* the <a
* href="../../../../api/org/w3c/dom/Element.html">
* <code>org.w3c.dom.Element</code></a> interface and additionally allows
* for the storage of non-textual objects via the
* <code>getUserObject</code> and <code>setUserObject</code> methods.
*
* <p> This class is not intended to be used for general XML
* processing. In particular, <code>Element</code> nodes created
* within the Image I/O API are not compatible with those created by
* Sun's standard implementation of the <code>org.w3.dom</code> API.
* In particular, the implementation is tuned for simple uses and may
* not perform well for intensive processing.
*
* <p> Namespaces are ignored in this implementation. The terms "tag
* name" and "node name" are always considered to be synonymous.
*
* @see IIOMetadata#getAsTree
* @see IIOMetadata#setFromTree
* @see IIOMetadata#mergeTree
*
* @version 0.5
*/
public class IIOMetadataNode implements Element, NodeList {
/**
* The name of the node as a <code>String</code>.
*/
private String nodeName = null;
/**
* The value of the node as a <code>String</code>. The Image I/O
* API typically does not make use of the node value.
*/
private String nodeValue = null;
/**
* The <code>Object</code> value associated with this node.
*/
private Object userObject = null;
/**
* The parent node of this node, or <code>null</code> if this node
* forms the root of its own tree.
*/
private IIOMetadataNode parent = null;
/**
* The number of child nodes.
*/
private int numChildren = 0;
/**
* The first (leftmost) child node of this node, or
* <code>null</code> if this node is a leaf node.
*/
private IIOMetadataNode firstChild = null;
/**
* The last (rightmost) child node of this node, or
* <code>null</code> if this node is a leaf node.
*/
private IIOMetadataNode lastChild = null;
/**
* The next (right) sibling node of this node, or
* <code>null</code> if this node is its parent's last child node.
*/
private IIOMetadataNode nextSibling = null;
/**
* The previous (left) sibling node of this node, or
* <code>null</code> if this node is its parent's first child node.
*/
private IIOMetadataNode previousSibling = null;
/**
* A <code>List</code> of <code>IIOAttr</code> nodes representing
* attributes.
*/
private List attributes = new ArrayList();
/**
* Constructs an empty <code>IIOMetadataNode</code>.
*/
public IIOMetadataNode() {}
/**
* Constructs an <code>IIOMetadataNode</code> with a given node
* name.
*
* @param nodeName the name of the node, as a <code>String</code>.
*/
public IIOMetadataNode(String nodeName) {
this.nodeName = nodeName;
}
/**
* Check that the node is either <code>null</code> or an
* <code>IIOMetadataNode</code>.
*/
private void checkNode(Node node) throws DOMException {
if (node == null) {
return;
}
if (!(node instanceof IIOMetadataNode)) {
throw new IIODOMException(DOMException.WRONG_DOCUMENT_ERR,
"Node not an IIOMetadataNode!");
}
}
// Methods from Node
/**
* Returns the node name associated with this node.
*
* @return the node name, as a <code>String</code>.
*/
public String getNodeName() {
return nodeName;
}
public String getNodeValue() throws DOMException {
return nodeValue;
}
public void setNodeValue(String nodeValue) throws DOMException {
this.nodeValue = nodeValue;
}
/**
* Returns the node type, which is always
* <code>ELEMENT_NODE</code>.
*
* @return the <code>short</code> value <code>ELEMENT_NODE</code>.
*/
public short getNodeType() {
return ELEMENT_NODE;
}
/**
* Returns the parent of this node. A <code>null</code> value
* indicates that the node is the root of its own tree. To add a
* node to an existing tree, use one of the
* <code>insertBefore</code>, <code>replaceChild</code>, or
* <code>appendChild</code> methods.
*
* @return the parent, as a <code>Node</code>.
*
* @see #insertBefore
* @see #replaceChild
* @see #appendChild
*/
public Node getParentNode() {
return parent;
}
public NodeList getChildNodes() {
return this;
}
/**
* Returns the first child of this node, or <code>null</code> if
* the node has no children.
*
* @return the first child, as a <code>Node</code>, or
* <code>null</code>
*/
public Node getFirstChild() {
return firstChild;
}
/**
* Returns the last child of this node, or <code>null</code> if
* the node has no children.
*
* @return the last child, as a <code>Node</code>, or
* <code>null</code>.
*/
public Node getLastChild() {
return lastChild;
}
/**
* Returns the previous sibling of this node, or <code>null</code>
* if this node has no previous sibling.
*
* @return the previous sibling, as a <code>Node</code>, or
* <code>null</code>.
*/
public Node getPreviousSibling() {
return previousSibling;
}
/**
* Returns the next sibling of this node, or <code>null</code> if
* the node has no next sibling.
*
* @return the next sibling, as a <code>Node</code>, or
* <code>null</code>.
*/
public Node getNextSibling() {
return nextSibling;
}
public NamedNodeMap getAttributes() {
return new IIONamedNodeMap(attributes);
}
/**
* Returns <code>null</code>, since <code>IIOMetadataNode</code>s
* do not belong to any <code>Document</code>.
*
* @return <code>null</code>.
*/
public Document getOwnerDocument() {
return null;
}
/**
* Inserts the node <code>newChild</code> before the existing
* child node <code>refChild</code>. If <code>refChild</code> is
* <code>null</code>, insert <code>newChild</code> at the end of
* the list of children.
*
* @param newChild the <code>Node</code> to insert.
* @param refChild the reference <code>Node</code>.
*
* @return the node being inserted.
*
* @exception IllegalArgumentException if <code>newChild</code> is
* <code>null</code>.
*/
public Node insertBefore(Node newChild,
Node refChild) {
if (newChild == null) {
throw new IllegalArgumentException("newChild == null!");
}
checkNode(newChild);
checkNode(refChild);
IIOMetadataNode newChildNode = (IIOMetadataNode)newChild;
IIOMetadataNode refChildNode = (IIOMetadataNode)refChild;
// Siblings, can be null.
IIOMetadataNode previous = null;
IIOMetadataNode next = null;
if (refChild == null) {
previous = this.lastChild;
next = null;
this.lastChild = newChildNode;
} else {
previous = refChildNode.previousSibling;
next = refChildNode;
}
if (previous != null) {
previous.nextSibling = newChildNode;
}
if (next != null) {
next.previousSibling = newChildNode;
}
newChildNode.parent = this;
newChildNode.previousSibling = previous;
newChildNode.nextSibling = next;
// N.B.: O.K. if refChild == null
if (this.firstChild == refChildNode) {
this.firstChild = newChildNode;
}
++numChildren;
return newChildNode;
}
/**
* Replaces the child node <code>oldChild</code> with
* <code>newChild</code> in the list of children, and returns the
* <code>oldChild</code> node.
*
* @param newChild the <code>Node</code> to insert.
* @param oldChild the <code>Node</code> to be replaced.
*
* @return the node replaced.
*
* @exception IllegalArgumentException if <code>newChild</code> is
* <code>null</code>.
*/
public Node replaceChild(Node newChild,
Node oldChild) {
if (newChild == null) {
throw new IllegalArgumentException("newChild == null!");
}
checkNode(newChild);
checkNode(oldChild);
IIOMetadataNode newChildNode = (IIOMetadataNode)newChild;
IIOMetadataNode oldChildNode = (IIOMetadataNode)oldChild;
IIOMetadataNode previous = oldChildNode.previousSibling;
IIOMetadataNode next = oldChildNode.nextSibling;
if (previous != null) {
previous.nextSibling = newChildNode;
}
if (next != null) {
next.previousSibling = newChildNode;
}
newChildNode.parent = this;
newChildNode.previousSibling = previous;
newChildNode.nextSibling = next;
if (firstChild == oldChildNode) {
firstChild = newChildNode;
}
if (lastChild == oldChildNode) {
lastChild = newChildNode;
}
oldChildNode.parent = null;
oldChildNode.previousSibling = null;
oldChildNode.nextSibling = null;
return oldChildNode;
}
/**
* Removes the child node indicated by <code>oldChild</code> from
* the list of children, and returns it.
*
* @param oldChild the <code>Node</code> to be removed.
*
* @return the node removed.
*
* @exception IllegalArgumentException if <code>oldChild</code> is
* <code>null</code>.
*/
public Node removeChild(Node oldChild) {
if (oldChild == null) {
throw new IllegalArgumentException("oldChild == null!");
}
checkNode(oldChild);
IIOMetadataNode oldChildNode = (IIOMetadataNode)oldChild;
IIOMetadataNode previous = oldChildNode.previousSibling;
IIOMetadataNode next = oldChildNode.nextSibling;
if (previous != null) {
previous.nextSibling = next;
}
if (next != null) {
next.previousSibling = previous;
}
if (this.firstChild == oldChildNode) {
this.firstChild = next;
}
if (this.lastChild == oldChildNode) {
this.lastChild = previous;
}
oldChildNode.parent = null;
oldChildNode.previousSibling = null;
oldChildNode.nextSibling = null;
--numChildren;
return oldChildNode;
}
/**
* Adds the node <code>newChild</code> to the end of the list of
* children of this node.
*
* @param newChild the <code>Node</code> to insert.
*
* @return the node added.
*
* @exception IllegalArgumentException if <code>newChild</code> is
* <code>null</code>.
*/
public Node appendChild(Node newChild) {
if (newChild == null) {
throw new IllegalArgumentException("newChild == null!");
}
checkNode(newChild);
// insertBefore will increment numChildren
return insertBefore(newChild, null);
}
/**
* Returns <code>true</code> if this node has child nodes.
*
* @return <code>true</code> if this node has children.
*/
public boolean hasChildNodes() {
return numChildren > 0;
}
/**
* Returns a duplicate of this node. The duplicate node has no
* parent (<code>getParentNode</code> returns <code>null</code>).
* If a shallow clone is being performed (<code>deep</code> is
* <code>false</code>), the new node will not have any children or
* siblings. If a deep clone is being performed, the new node
* will form the root of a complete cloned subtree.
*
* @param deep if <code>true</code>, recursively clone the subtree
* under the specified node; if <code>false</code>, clone only the
* node itself.
*
* @return the duplicate node.
*/
public Node cloneNode(boolean deep) {
IIOMetadataNode newNode = new IIOMetadataNode(this.nodeName);
newNode.setUserObject(getUserObject());
// Attributes
if (deep) {
for (IIOMetadataNode child = firstChild;
child != null;
child = child.nextSibling) {
newNode.appendChild(child.cloneNode(true));
}
}
return newNode;
}
/**
* Does nothing, since <code>IIOMetadataNode</code>s do not
* contain <code>Text</code> children.
*/
public void normalize() {
}
/**
* Returns <code>false</code> since DOM features are not
* supported.
*
* @return <code>false</code>.
*
* @param feature a <code>String</code>, which is ignored.
* @param version a <code>String</code>, which is ignored.
*/
public boolean isSupported(String feature, String version) {
return false;
}
/**
* Returns <code>null</code>, since namespaces are not supported.
*/
public String getNamespaceURI() throws DOMException {
return null;
}
/**
* Returns <code>null</code>, since namespaces are not supported.
*
* @return <code>null</code>.
*
* @see #setPrefix
*/
public String getPrefix() {
return null;
}
/**
* Does nothing, since namespaces are not supported.
*
* @param prefix a <code>String</code>, which is ignored.
*
* @see #getPrefix
*/
public void setPrefix(String prefix) {
}
/**
* Equivalent to <code>getNodeName</code>.
*
* @return the node name, as a <code>String</code>.
*/
public String getLocalName() {
return nodeName;
}
// Methods from Element
public String getTagName() {
return nodeName;
}
public String getAttribute(String name) {
Attr attr = getAttributeNode(name);
if (attr == null) {
return "";
}
return attr.getValue();
}
/**
* Equivalent to <code>getAttribute(localName)</code>.
*
* @see #setAttributeNS
*/
public String getAttributeNS(String namespaceURI, String localName) {
return getAttribute(localName);
}
public void setAttribute(String name, String value) {
// Note minor dependency on Crimson package
// Steal the code if Crimson ever goes away
if (!com.sun.imageio.metadata.XmlNames.isName(name)) {
throw new IIODOMException(DOMException.INVALID_CHARACTER_ERR,
"Attribute name is illegal!");
}
removeAttribute(name, false);
attributes.add(new IIOAttr(this, name, value));
}
/**
* Equivalent to <code>setAttribute(qualifiedName, value)</code>.
*
* @see #getAttributeNS
*/
public void setAttributeNS(String namespaceURI,
String qualifiedName, String value) {
setAttribute(qualifiedName, value);
}
public void removeAttribute(String name) {
removeAttribute(name, true);
}
private void removeAttribute(String name, boolean checkPresent) {
int numAttributes = attributes.size();
for (int i = 0; i < numAttributes; i++) {
IIOAttr attr = (IIOAttr)attributes.get(i);
if (name.equals(attr.getName())) {
attr.setOwnerElement(null);
attributes.remove(i);
return;
}
}
// If we get here, the attribute doesn't exist
if (checkPresent) {
throw new IIODOMException(DOMException.NOT_FOUND_ERR,
"No such attribute!");
}
}
/**
* Equivalent to <code>removeAttribute(localName)</code>.
*/
public void removeAttributeNS(String namespaceURI,
String localName) {
removeAttribute(localName);
}
public Attr getAttributeNode(String name) {
Node node = getAttributes().getNamedItem(name);
return (Attr)node;
}
/**
* Equivalent to <code>getAttributeNode(localName)</code>.
*
* @see #setAttributeNodeNS
*/
public Attr getAttributeNodeNS(String namespaceURI,
String localName) {
return getAttributeNode(localName);
}
public Attr setAttributeNode(Attr newAttr) throws DOMException {
Element owner = newAttr.getOwnerElement();
if (owner != null) {
if (owner == this) {
return null;
} else {
throw new DOMException(DOMException.INUSE_ATTRIBUTE_ERR,
"Attribute is already in use");
}
}
IIOAttr attr;
if (newAttr instanceof IIOAttr) {
attr = (IIOAttr)newAttr;
attr.setOwnerElement(this);
} else {
attr = new IIOAttr(this,
newAttr.getName(),
newAttr.getValue());
}
Attr oldAttr = getAttributeNode(attr.getName());
if (oldAttr != null) {
removeAttributeNode(oldAttr);
}
attributes.add(attr);
return oldAttr;
}
/**
* Equivalent to <code>setAttributeNode(newAttr)</code>.
*
* @see #getAttributeNodeNS
*/
public Attr setAttributeNodeNS(Attr newAttr) {
return setAttributeNode(newAttr);
}
public Attr removeAttributeNode(Attr oldAttr) {
removeAttribute(oldAttr.getName());
return oldAttr;
}
public NodeList getElementsByTagName(String name) {
List l = new ArrayList();
getElementsByTagName(name, l);
return new IIONodeList(l);
}
private void getElementsByTagName(String name, List l) {
if (nodeName.equals(name)) {
l.add(this);
}
Node child = getFirstChild();
while (child != null) {
((IIOMetadataNode)child).getElementsByTagName(name, l);
child = child.getNextSibling();
}
}
/**
* Equivalent to <code>getElementsByTagName(localName)</code>.
*/
public NodeList getElementsByTagNameNS(String namespaceURI,
String localName) {
return getElementsByTagName(localName);
}
public boolean hasAttributes() {
return attributes.size() > 0;
}
public boolean hasAttribute(String name) {
return getAttributeNode(name) != null;
}
/**
* Equivalent to <code>hasAttribute(localName)</code>.
*/
public boolean hasAttributeNS(String namespaceURI,
String localName) {
return hasAttribute(localName);
}
// Methods from NodeList
public int getLength() {
return numChildren;
}
public Node item(int index) {
if (index < 0) {
return null;
}
Node child = getFirstChild();
while (child != null && index-- > 0) {
child = child.getNextSibling();
}
return child;
}
/**
* Returns the <code>Object</code> value associated with this node.
*
* @return the user <code>Object</code>.
*
* @see #setUserObject
*/
public Object getUserObject() {
return userObject;
}
/**
* Sets the value associated with this node.
*
* @param userObject the user <code>Object</code>.
*
* @see #getUserObject
*/
public void setUserObject(Object userObject) {
this.userObject = userObject;
}
// Start of dummy methods for DOM L3. PENDING: Please revisit
public void setIdAttribute(String name,
boolean isId)
throws DOMException {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public void setIdAttributeNS(String namespaceURI,
String localName,
boolean isId)
throws DOMException {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public void setIdAttributeNode(Attr idAttr,
boolean isId)
throws DOMException {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public TypeInfo getSchemaTypeInfo() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public Object setUserData(String key,
Object data,
UserDataHandler handler) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public Object getUserData ( String key ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public Object getFeature ( String feature, String version ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public boolean isSameNode( Node node ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public boolean isEqualNode( Node node ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public String lookupNamespaceURI( String prefix ) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public boolean isDefaultNamespace(String namespaceURI) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public String lookupPrefix(String namespaceURI) {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
String textContent;
public String getTextContent() throws DOMException {
return textContent;
}
public void setTextContent(String textContent) throws DOMException{
this.textContent = textContent; //PENDING
}
public short compareDocumentPosition(Node other)
throws DOMException {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
public String getBaseURI() {
throw new DOMException(DOMException.NOT_SUPPORTED_ERR, "Method not supported");
}
//End of dummy methods for DOM L3. Please revisit
}
|
