Class IIOMetadataNode

java.lang.Object
- javax.imageio.metadata.IIOMetadataNode

All Implemented Interfaces:: Element, Node, NodeList

public class IIOMetadataNode
extends Object
implements Element, NodeList

A class representing a node in a meta-data tree, which implements the org.w3c.dom.Element interface and additionally allows for the storage of non-textual objects via the getUserObject and setUserObject methods.

This class is not intended to be used for general XML processing. In particular, Element nodes created within the Image I/O API are not compatible with those created by Sun's standard implementation of the org.w3.dom API. In particular, the implementation is tuned for simple uses and may not perform well for intensive processing.

Namespaces are ignored in this implementation. The terms "tag name" and "node name" are always considered to be synonymous. Note: The DOM Level 3 specification added a number of new methods to the Node, Element and Attr interfaces that are not of value to the IIOMetadataNode implementation or specification. Calling such methods on an IIOMetadataNode, or an Attr instance returned from an IIOMetadataNode will result in a DOMException being thrown.

See Also:: IIOMetadata.getAsTree(java.lang.String), IIOMetadata.setFromTree(java.lang.String, org.w3c.dom.Node), IIOMetadata.mergeTree(java.lang.String, org.w3c.dom.Node)

Fields

Fields declared in interface org.w3c.dom.Node

ATTRIBUTE_NODE, CDATA_SECTION_NODE, COMMENT_NODE, DOCUMENT_FRAGMENT_NODE, DOCUMENT_NODE, DOCUMENT_POSITION_CONTAINED_BY, DOCUMENT_POSITION_CONTAINS, DOCUMENT_POSITION_DISCONNECTED, DOCUMENT_POSITION_FOLLOWING, DOCUMENT_POSITION_IMPLEMENTATION_SPECIFIC, DOCUMENT_POSITION_PRECEDING, DOCUMENT_TYPE_NODE, ELEMENT_NODE, ENTITY_NODE, ENTITY_REFERENCE_NODE, NOTATION_NODE, PROCESSING_INSTRUCTION_NODE, TEXT_NODE

Constructors

Constructor	Description
`IIOMetadataNode()`	Constructs an empty `IIOMetadataNode`.
`IIOMetadataNode(String nodeName)`	Constructs an `IIOMetadataNode` with a given node name.

Methods

Modifier and Type	Method	Description
`Node`	`appendChild(Node newChild)`	Adds the node `newChild` to the end of the list of children of this node.
`Node`	`cloneNode(boolean deep)`	Returns a duplicate of this node.
`short`	`compareDocumentPosition(Node other)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`String`	`getAttribute(String name)`	Retrieves an attribute value by name.
`Attr`	`getAttributeNodeNS(String namespaceURI, String localName)`	Equivalent to `getAttributeNode(localName)`.
`String`	`getAttributeNS(String namespaceURI, String localName)`	Equivalent to `getAttribute(localName)`.
`NamedNodeMap`	`getAttributes()`	Returns a `NamedNodeMap` containing the attributes of this node.
`String`	`getBaseURI()`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`NodeList`	`getChildNodes()`	Returns a `NodeList` that contains all children of this node.
`NodeList`	`getElementsByTagNameNS(String namespaceURI, String localName)`	Equivalent to `getElementsByTagName(localName)`.
`Object`	`getFeature(String feature, String version)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`Node`	`getFirstChild()`	Returns the first child of this node, or `null` if the node has no children.
`Node`	`getLastChild()`	Returns the last child of this node, or `null` if the node has no children.
`String`	`getLocalName()`	Equivalent to `getNodeName`.
`String`	`getNamespaceURI()`	Returns `null`, since namespaces are not supported.
`Node`	`getNextSibling()`	Returns the next sibling of this node, or `null` if the node has no next sibling.
`String`	`getNodeName()`	Returns the node name associated with this node.
`short`	`getNodeType()`	Returns the node type, which is always `ELEMENT_NODE`.
`String`	`getNodeValue()`	Returns the value associated with this node.
`Document`	`getOwnerDocument()`	Returns `null`, since `IIOMetadataNode`s do not belong to any `Document`.
`Node`	`getParentNode()`	Returns the parent of this node.
`String`	`getPrefix()`	Returns `null`, since namespaces are not supported.
`Node`	`getPreviousSibling()`	Returns the previous sibling of this node, or `null` if this node has no previous sibling.
`TypeInfo`	`getSchemaTypeInfo()`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`String`	`getTagName()`	Equivalent to `getNodeName`.
`String`	`getTextContent()`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`Object`	`getUserData(String key)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`Object`	`getUserObject()`	Returns the `Object` value associated with this node.
`boolean`	`hasAttributeNS(String namespaceURI, String localName)`	Equivalent to `hasAttribute(localName)`.
`boolean`	`hasChildNodes()`	Returns `true` if this node has child nodes.
`Node`	`insertBefore(Node newChild, Node refChild)`	Inserts the node `newChild` before the existing child node `refChild`.
`boolean`	`isDefaultNamespace(String namespaceURI)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`boolean`	`isEqualNode(Node node)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`boolean`	`isSameNode(Node node)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`boolean`	`isSupported(String feature, String version)`	Returns `false` since DOM features are not supported.
`String`	`lookupNamespaceURI(String prefix)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`String`	`lookupPrefix(String namespaceURI)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`void`	`normalize()`	Does nothing, since `IIOMetadataNode`s do not contain `Text` children.
`void`	`removeAttributeNS(String namespaceURI, String localName)`	Equivalent to `removeAttribute(localName)`.
`Node`	`removeChild(Node oldChild)`	Removes the child node indicated by `oldChild` from the list of children, and returns it.
`Node`	`replaceChild(Node newChild, Node oldChild)`	Replaces the child node `oldChild` with `newChild` in the list of children, and returns the `oldChild` node.
`Attr`	`setAttributeNodeNS(Attr newAttr)`	Equivalent to `setAttributeNode(newAttr)`.
`void`	`setAttributeNS(String namespaceURI, String qualifiedName, String value)`	Equivalent to `setAttribute(qualifiedName, value)`.
`void`	`setIdAttribute(String name, boolean isId)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`void`	`setIdAttributeNode(Attr idAttr, boolean isId)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`void`	`setIdAttributeNS(String namespaceURI, String localName, boolean isId)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`void`	`setNodeValue(String nodeValue)`	Sets the `String` value associated with this node.
`void`	`setPrefix(String prefix)`	Does nothing, since namespaces are not supported.
`void`	`setTextContent(String textContent)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`Object`	`setUserData(String key, Object data, UserDataHandler handler)`	This DOM Level 3 method is not supported for `IIOMetadataNode` and will throw a `DOMException`.
`void`	`setUserObject(Object userObject)`	Sets the value associated with this node.

Methods declared in class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods declared in interface org.w3c.dom.Element

getAttributeNode, getElementsByTagName, hasAttribute, removeAttribute, removeAttributeNode, setAttribute, setAttributeNode

Methods declared in interface org.w3c.dom.Node

hasAttributes

Methods declared in interface org.w3c.dom.NodeList

getLength, item

Constructors

IIOMetadataNode

public IIOMetadataNode()

Constructs an empty IIOMetadataNode.

IIOMetadataNode

public IIOMetadataNode(String nodeName)

Constructs an IIOMetadataNode with a given node name.

Parameters:: nodeName - the name of the node, as a String.

Methods

getNodeName

public String getNodeName()

Returns the node name associated with this node.

Specified by:: getNodeName in interface Node
Returns:: the node name, as a String.

getNodeValue

public String getNodeValue()

Returns the value associated with this node.

Specified by:: getNodeValue in interface Node
Returns:: the node value, as a String.

setNodeValue

public void setNodeValue(String nodeValue)

Sets the String value associated with this node.

Specified by:: setNodeValue in interface Node

getNodeType

public short getNodeType()

Returns the node type, which is always ELEMENT_NODE.

Specified by:: getNodeType in interface Node
Returns:: the short value ELEMENT_NODE.

getParentNode

public Node getParentNode()

Returns the parent of this node. A null value indicates that the node is the root of its own tree. To add a node to an existing tree, use one of the insertBefore, replaceChild, or appendChild methods.

Specified by:: getParentNode in interface Node
Returns:: the parent, as a Node.
See Also:: insertBefore(org.w3c.dom.Node, org.w3c.dom.Node), replaceChild(org.w3c.dom.Node, org.w3c.dom.Node), appendChild(org.w3c.dom.Node)

getChildNodes

public NodeList getChildNodes()

Returns a NodeList that contains all children of this node. If there are no children, this is a NodeList containing no nodes.

Specified by:: getChildNodes in interface Node
Returns:: the children as a NodeList

getFirstChild

public Node getFirstChild()

Returns the first child of this node, or null if the node has no children.

Specified by:: getFirstChild in interface Node
Returns:: the first child, as a Node, or null

getLastChild

public Node getLastChild()

Returns the last child of this node, or null if the node has no children.

Specified by:: getLastChild in interface Node
Returns:: the last child, as a Node, or null.

getPreviousSibling

public Node getPreviousSibling()

Returns the previous sibling of this node, or null if this node has no previous sibling.

Specified by:: getPreviousSibling in interface Node
Returns:: the previous sibling, as a Node, or null.

getNextSibling

public Node getNextSibling()

Returns the next sibling of this node, or null if the node has no next sibling.

Specified by:: getNextSibling in interface Node
Returns:: the next sibling, as a Node, or null.

getAttributes

public NamedNodeMap getAttributes()

Returns a NamedNodeMap containing the attributes of this node.

Specified by:: getAttributes in interface Node
Returns:: a NamedNodeMap containing the attributes of this node.

getOwnerDocument

public Document getOwnerDocument()

Returns null, since IIOMetadataNodes do not belong to any Document.

Specified by:: getOwnerDocument in interface Node
Returns:: null.

insertBefore

public Node insertBefore(Node newChild,
                         Node refChild)

Inserts the node newChild before the existing child node refChild. If refChild is null, insert newChild at the end of the list of children.

Specified by:: insertBefore in interface Node
Parameters:: newChild - the Node to insert.; refChild - the reference Node.
Returns:: the node being inserted.
Throws:: IllegalArgumentException - if newChild is null.

replaceChild

public Node replaceChild(Node newChild,
                         Node oldChild)

Replaces the child node oldChild with newChild in the list of children, and returns the oldChild node.

Specified by:: replaceChild in interface Node
Parameters:: newChild - the Node to insert.; oldChild - the Node to be replaced.
Returns:: the node replaced.
Throws:: IllegalArgumentException - if newChild is null.

removeChild

public Node removeChild(Node oldChild)

Removes the child node indicated by oldChild from the list of children, and returns it.

Specified by:: removeChild in interface Node
Parameters:: oldChild - the Node to be removed.
Returns:: the node removed.
Throws:: IllegalArgumentException - if oldChild is null.

appendChild

public Node appendChild(Node newChild)

Adds the node newChild to the end of the list of children of this node.

Specified by:: appendChild in interface Node
Parameters:: newChild - the Node to insert.
Returns:: the node added.
Throws:: IllegalArgumentException - if newChild is null.

hasChildNodes

public boolean hasChildNodes()

Returns true if this node has child nodes.

Specified by:: hasChildNodes in interface Node
Returns:: true if this node has children.

cloneNode

public Node cloneNode(boolean deep)

Returns a duplicate of this node. The duplicate node has no parent (getParentNode returns null). If a shallow clone is being performed (deep is false), 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.

Specified by:: cloneNode in interface Node
Parameters:: deep - if true, recursively clone the subtree under the specified node; if false, clone only the node itself.
Returns:: the duplicate node.

normalize

public void normalize()

Does nothing, since IIOMetadataNodes do not contain Text children.

Specified by:: normalize in interface Node

isSupported

public boolean isSupported(String feature,
                           String version)

Returns false since DOM features are not supported.

Specified by:: isSupported in interface Node
Parameters:: feature - a String, which is ignored.; version - a String, which is ignored.
Returns:: false.

getNamespaceURI

public String getNamespaceURI()
                       throws DOMException

Returns null, since namespaces are not supported.

Specified by:: getNamespaceURI in interface Node
Throws:: DOMException

getPrefix

public String getPrefix()

Returns null, since namespaces are not supported.

Specified by:: getPrefix in interface Node
Returns:: null.
See Also:: setPrefix(java.lang.String)

setPrefix

public void setPrefix(String prefix)

Does nothing, since namespaces are not supported.

Specified by:: setPrefix in interface Node
Parameters:: prefix - a String, which is ignored.
See Also:: getPrefix()

getLocalName

public String getLocalName()

Equivalent to getNodeName.

Specified by:: getLocalName in interface Node
Returns:: the node name, as a String.

getTagName

public String getTagName()

Equivalent to getNodeName.

Specified by:: getTagName in interface Element
Returns:: the node name, as a String

getAttribute

public String getAttribute(String name)

Retrieves an attribute value by name.

Specified by:: getAttribute in interface Element
Parameters:: name - The name of the attribute to retrieve.
Returns:: The Attr value as a string, or the empty string if that attribute does not have a specified or default value.

getAttributeNS

public String getAttributeNS(String namespaceURI,
                             String localName)

Equivalent to getAttribute(localName).

Specified by:: getAttributeNS in interface Element
Parameters:: namespaceURI - The namespace URI of the attribute to retrieve.; localName - The local name of the attribute to retrieve.
Returns:: The Attr value as a string, or the empty string if that attribute does not have a specified or default value.
See Also:: setAttributeNS(java.lang.String, java.lang.String, java.lang.String)

setAttributeNS

public void setAttributeNS(String namespaceURI,
                           String qualifiedName,
                           String value)

Equivalent to setAttribute(qualifiedName, value).

Specified by:: setAttributeNS in interface Element
Parameters:: namespaceURI - The namespace URI of the attribute to create or alter.; qualifiedName - The qualified name of the attribute to create or alter.; value - The value to set in string form.
See Also:: getAttributeNS(java.lang.String, java.lang.String)

removeAttributeNS

public void removeAttributeNS(String namespaceURI,
                              String localName)

Equivalent to removeAttribute(localName).

Specified by:: removeAttributeNS in interface Element
Parameters:: namespaceURI - The namespace URI of the attribute to remove.; localName - The local name of the attribute to remove.

getAttributeNodeNS

public Attr getAttributeNodeNS(String namespaceURI,
                               String localName)

Equivalent to getAttributeNode(localName).

Specified by:: getAttributeNodeNS in interface Element
Parameters:: namespaceURI - The namespace URI of the attribute to retrieve.; localName - The local name of the attribute to retrieve.
Returns:: The Attr node with the specified attribute local name and namespace URI or null if there is no such attribute.
See Also:: setAttributeNodeNS(org.w3c.dom.Attr)

setAttributeNodeNS

public Attr setAttributeNodeNS(Attr newAttr)

Equivalent to setAttributeNode(newAttr).

Specified by:: setAttributeNodeNS in interface Element
Parameters:: newAttr - The Attr node to add to the attribute list.
Returns:: If the newAttr attribute replaces an existing attribute with the same local name and namespace URI, the replaced Attr node is returned, otherwise null is returned.
See Also:: getAttributeNodeNS(java.lang.String, java.lang.String)

getElementsByTagNameNS

public NodeList getElementsByTagNameNS(String namespaceURI,
                                       String localName)

Equivalent to getElementsByTagName(localName).

Specified by:: getElementsByTagNameNS in interface Element
Parameters:: namespaceURI - The namespace URI of the elements to match on. The special value "*" matches all namespaces.; localName - The local name of the elements to match on. The special value "*" matches all local names.
Returns:: A new NodeList object containing all the matched Elements.

hasAttributeNS

public boolean hasAttributeNS(String namespaceURI,
                              String localName)

Equivalent to hasAttribute(localName).

Specified by:: hasAttributeNS in interface Element
Parameters:: namespaceURI - The namespace URI of the attribute to look for.; localName - The local name of the attribute to look for.
Returns:: true if an attribute with the given local name and namespace URI is specified or has a default value on this element, false otherwise.

getUserObject

public Object getUserObject()

Returns the Object value associated with this node.

Returns:: the user Object.
See Also:: setUserObject(java.lang.Object)

setUserObject

public void setUserObject(Object userObject)

Sets the value associated with this node.

Parameters:: userObject - the user Object.
See Also:: getUserObject()