Package net.sf.saxon.tree.wrapper
Class AbstractVirtualNode
- java.lang.Object
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- net.sf.saxon.tree.wrapper.AbstractVirtualNode
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- All Implemented Interfaces:
javax.xml.transform.Source
,PullEvent
,Item<NodeInfo>
,NodeInfo
,ValueRepresentation<NodeInfo>
,VirtualNode
- Direct Known Subclasses:
SpaceStrippedNode
,TypeStrippedNode
public abstract class AbstractVirtualNode extends java.lang.Object implements VirtualNode
AbstractVirtualNode is an abstract superclass for VirtualNode implementations in which the underlying node is itself a Saxon NodeInfo.
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Field Summary
Fields Modifier and Type Field Description protected AbstractVirtualNode
docWrapper
protected NodeInfo
node
protected AbstractVirtualNode
parent
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Fields inherited from interface net.sf.saxon.om.NodeInfo
ALL_NAMESPACES, IS_DTD_TYPE, IS_NILLED, LOCAL_NAMESPACES, NO_NAMESPACES
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Fields inherited from interface net.sf.saxon.om.ValueRepresentation
EMPTY_VALUE_ARRAY
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Constructor Summary
Constructors Constructor Description AbstractVirtualNode()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Value
atomize()
Get the typed value.int
compareOrder(NodeInfo other)
Determine the relative position of this node and another node, in document order.boolean
equals(java.lang.Object other)
The equals() method compares nodes for identity.void
generateId(FastStringBuffer buffer)
Get a character string that uniquely identifies this node.java.lang.String
getAttributeValue(int fingerprint)
Get the value of a given attribute of this nodejava.lang.String
getAttributeValue(java.lang.String uri, java.lang.String local)
Get the string value of a given attribute of this nodejava.lang.String
getBaseURI()
Get the Base URI for the node, that is, the URI used for resolving a relative URI contained in the node.int
getColumnNumber()
Get column numberConfiguration
getConfiguration()
Get the configurationNamespaceBinding[]
getDeclaredNamespaces(NamespaceBinding[] buffer)
Get all namespace undeclarations and undeclarations defined on this element.java.lang.String
getDisplayName()
Get the display name of this node.long
getDocumentNumber()
Get the document number of the document containing this node.DocumentInfo
getDocumentRoot()
Get the root (document) nodeint
getFingerprint()
Get fingerprint.int
getLineNumber()
Get line numberjava.lang.String
getLocalPart()
Get the local part of the name of this node.int
getNameCode()
Get name code.NamePool
getNamePool()
Get the name pool for this nodeint
getNodeKind()
Return the type of node.java.lang.String
getPrefix()
Get the prefix of the name of the node.java.lang.Object
getRealNode()
Get the node underlying this virtual node.NodeInfo
getRoot()
Get the root node - always a document node with this tree implementationSchemaType
getSchemaType()
Get the type annotationjava.lang.String
getStringValue()
Return the string value of the node.java.lang.CharSequence
getStringValueCS()
Get the value of the item as a CharSequence.java.lang.String
getSystemId()
Get the System ID for the node.int
getTypeAnnotation()
Get the type annotationSequenceIterator
getTypedValue()
Get the typed value of the itemNodeInfo
getUnderlyingNode()
Get the underlying node, to implement the VirtualNode interfacejava.lang.String
getURI()
Get the URI part of the name of this node.boolean
hasChildNodes()
Determine whether the node has any children.int
hashCode()
The hashCode() method obeys the contract for hashCode(): that is, if two objects are equal (represent the same node) then they must have the same hashCode()boolean
isId()
Determine whether this node has the is-id propertyboolean
isIdref()
Determine whether this node has the is-idref propertyboolean
isNilled()
Determine whether the node has the is-nilled propertyboolean
isSameNodeInfo(NodeInfo other)
Determine whether this is the same node as another node.AxisIterator
iterateAxis(byte axisNumber, NodeTest nodeTest)
Return an iteration over the nodes reached by the given axis from this nodevoid
setSystemId(java.lang.String uri)
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait
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Methods inherited from interface net.sf.saxon.om.NodeInfo
copy, getParent, iterateAxis
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Field Detail
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node
protected NodeInfo node
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parent
protected AbstractVirtualNode parent
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docWrapper
protected AbstractVirtualNode docWrapper
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Method Detail
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getUnderlyingNode
public NodeInfo getUnderlyingNode()
Get the underlying node, to implement the VirtualNode interface- Specified by:
getUnderlyingNode
in interfaceVirtualNode
- Returns:
- The underlying node.
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getRealNode
public java.lang.Object getRealNode()
Get the node underlying this virtual node. If this is a VirtualNode the method will automatically drill down through several layers of wrapping.- Specified by:
getRealNode
in interfaceVirtualNode
- Returns:
- The underlying node.
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getConfiguration
public Configuration getConfiguration()
Get the configuration- Specified by:
getConfiguration
in interfaceNodeInfo
- Returns:
- the Configuration
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getNamePool
public NamePool getNamePool()
Get the name pool for this node- Specified by:
getNamePool
in interfaceNodeInfo
- Returns:
- the NamePool
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getNodeKind
public int getNodeKind()
Return the type of node.- Specified by:
getNodeKind
in interfaceNodeInfo
- Returns:
- one of the values Node.ELEMENT, Node.TEXT, Node.ATTRIBUTE, etc.
- See Also:
Type
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getTypedValue
public SequenceIterator getTypedValue() throws XPathException
Get the typed value of the item- Specified by:
getTypedValue
in interfaceItem<NodeInfo>
- Returns:
- an iterator over the items in the typed value of the node or atomic value. The items returned by this iterator will always be atomic values.
- Throws:
XPathException
- where no typed value is available, for example in the case of an element with complex content
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atomize
public Value atomize() throws XPathException
Get the typed value. The result of this method will always be consistent with the methodItem.getTypedValue()
. However, this method is often more convenient and may be more efficient, especially in the common case where the value is expected to be a singleton.- Specified by:
atomize
in interfaceNodeInfo
- Returns:
- the typed value. If requireSingleton is set to true, the result will always be an AtomicValue. In other cases it may be a Value representing a sequence whose items are atomic values.
- Throws:
XPathException
- if the node has no typed value, for example if it is an element node with element-only content- Since:
- 8.5
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getTypeAnnotation
public int getTypeAnnotation()
Get the type annotation- Specified by:
getTypeAnnotation
in interfaceNodeInfo
- Returns:
- the type annotation of the base node
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getSchemaType
public SchemaType getSchemaType()
Get the type annotation- Specified by:
getSchemaType
in interfaceNodeInfo
- Returns:
- the type annotation of the base node
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isSameNodeInfo
public boolean isSameNodeInfo(NodeInfo other)
Determine whether this is the same node as another node.
Note: a.isSameNode(b) if and only if generateId(a)==generateId(b)- Specified by:
isSameNodeInfo
in interfaceNodeInfo
- Parameters:
other
- the node to be compared with this node- Returns:
- true if this Node object and the supplied Node object represent the same node in the tree.
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equals
public boolean equals(java.lang.Object other)
The equals() method compares nodes for identity. It is defined to give the same result as isSameNodeInfo().- Specified by:
equals
in interfaceNodeInfo
- Overrides:
equals
in classjava.lang.Object
- Parameters:
other
- the node to be compared with this node- Returns:
- true if this NodeInfo object and the supplied NodeInfo object represent the same node in the tree.
- Since:
- 8.7 Previously, the effect of the equals() method was not defined. Callers should therefore be aware that third party implementations of the NodeInfo interface may not implement the correct semantics. It is safer to use isSameNodeInfo() for this reason. The equals() method has been defined because it is useful in contexts such as a Java Set or HashMap.
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hashCode
public int hashCode()
The hashCode() method obeys the contract for hashCode(): that is, if two objects are equal (represent the same node) then they must have the same hashCode()- Specified by:
hashCode
in interfaceNodeInfo
- Overrides:
hashCode
in classjava.lang.Object
- Since:
- 8.7 Previously, the effect of the equals() and hashCode() methods was not defined. Callers should therefore be aware that third party implementations of the NodeInfo interface may not implement the correct semantics.
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getSystemId
public java.lang.String getSystemId()
Get the System ID for the node.- Specified by:
getSystemId
in interfaceNodeInfo
- Specified by:
getSystemId
in interfacejavax.xml.transform.Source
- Returns:
- the System Identifier of the entity in the source document containing the node, or null if not known. Note this is not the same as the base URI: the base URI can be modified by xml:base, but the system ID cannot.
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setSystemId
public void setSystemId(java.lang.String uri)
- Specified by:
setSystemId
in interfacejavax.xml.transform.Source
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getBaseURI
public java.lang.String getBaseURI()
Get the Base URI for the node, that is, the URI used for resolving a relative URI contained in the node. In the JDOM model, base URIs are held only an the document level. We don't currently take any account of xml:base attributes.- Specified by:
getBaseURI
in interfaceNodeInfo
- Returns:
- the base URI of the node. This may be null if the base URI is unknown, including the case where the node has no parent.
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getLineNumber
public int getLineNumber()
Get line number- Specified by:
getLineNumber
in interfaceNodeInfo
- Returns:
- the line number of the node in its original source document; or -1 if not available
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getColumnNumber
public int getColumnNumber()
Get column number- Specified by:
getColumnNumber
in interfaceNodeInfo
- Returns:
- the column number of the node in its original source document; or -1 if not available
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compareOrder
public int compareOrder(NodeInfo other)
Determine the relative position of this node and another node, in document order. The other node will always be in the same document.- Specified by:
compareOrder
in interfaceNodeInfo
- Parameters:
other
- The other node, whose position is to be compared with this node- Returns:
- -1 if this node precedes the other node, +1 if it follows the other node, or 0 if they are the same node. (In this case, isSameNode() will always return true, and the two nodes will produce the same result for generateId())
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getStringValue
public final java.lang.String getStringValue()
Return the string value of the node. The interpretation of this depends on the type of node. For an element it is the accumulated character content of the element, including descendant elements.- Specified by:
getStringValue
in interfaceItem<NodeInfo>
- Specified by:
getStringValue
in interfaceNodeInfo
- Specified by:
getStringValue
in interfaceValueRepresentation<NodeInfo>
- Returns:
- the string value of the node
- See Also:
Item.getStringValueCS()
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getStringValueCS
public java.lang.CharSequence getStringValueCS()
Get the value of the item as a CharSequence. This is in some cases more efficient than the version of the method that returns a String.- Specified by:
getStringValueCS
in interfaceItem<NodeInfo>
- Specified by:
getStringValueCS
in interfaceValueRepresentation<NodeInfo>
- Returns:
- the string value of the item
- See Also:
Item.getStringValue()
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getNameCode
public int getNameCode()
Get name code. The name code is a coded form of the node name: two nodes with the same name code have the same namespace URI, the same local name, and the same prefix. By masking the name code with &0xfffff, you get a fingerprint: two nodes with the same fingerprint have the same local name and namespace URI.- Specified by:
getNameCode
in interfaceNodeInfo
- Returns:
- an integer name code, which may be used to obtain the actual node name from the name pool. For unnamed nodes (text nodes, comments, document nodes, and namespace nodes for the default namespace), returns -1.
- See Also:
allocate
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getFingerprint
public int getFingerprint()
Get fingerprint. The fingerprint is a coded form of the expanded name of the node: two nodes with the same name code have the same namespace URI and the same local name. A fingerprint of -1 should be returned for a node with no name.- Specified by:
getFingerprint
in interfaceNodeInfo
- Returns:
- an integer fingerprint; two nodes with the same fingerprint have the same expanded QName. For unnamed nodes (text nodes, comments, document nodes, and namespace nodes for the default namespace), returns -1.
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getLocalPart
public java.lang.String getLocalPart()
Get the local part of the name of this node. This is the name after the ":" if any.- Specified by:
getLocalPart
in interfaceNodeInfo
- Returns:
- the local part of the name. For an unnamed node, returns null, except for un unnamed namespace node, which returns "".
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getURI
public java.lang.String getURI()
Get the URI part of the name of this node. This is the URI corresponding to the prefix, or the URI of the default namespace if appropriate.
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getPrefix
public java.lang.String getPrefix()
Get the prefix of the name of the node. This is defined only for elements and attributes. If the node has no prefix, or for other kinds of node, return a zero-length string.
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getDisplayName
public java.lang.String getDisplayName()
Get the display name of this node. For elements and attributes this is [prefix:]localname. For unnamed nodes, it is an empty string.- Specified by:
getDisplayName
in interfaceNodeInfo
- Returns:
- The display name of this node. For a node with no name, return an empty string.
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iterateAxis
public AxisIterator iterateAxis(byte axisNumber, NodeTest nodeTest)
Return an iteration over the nodes reached by the given axis from this node- Specified by:
iterateAxis
in interfaceNodeInfo
- Parameters:
axisNumber
- the axis to be usednodeTest
- A pattern to be matched by the returned nodes- Returns:
- a SequenceIterator that scans the nodes reached by the axis in turn.
- See Also:
Axis
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getAttributeValue
public java.lang.String getAttributeValue(int fingerprint)
Get the value of a given attribute of this node- Specified by:
getAttributeValue
in interfaceNodeInfo
- Parameters:
fingerprint
- The fingerprint of the attribute name- Returns:
- the attribute value if it exists or null if not
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getAttributeValue
public java.lang.String getAttributeValue(java.lang.String uri, java.lang.String local)
Get the string value of a given attribute of this node- Specified by:
getAttributeValue
in interfaceNodeInfo
- Parameters:
uri
- the namespace URI of the attribute name. Supply the empty string for an attribute that is in no namespacelocal
- the local part of the attribute name.- Returns:
- the attribute value if it exists, or null if it does not exist. Always returns null if this node is not an element.
- Since:
- 9.4
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getRoot
public NodeInfo getRoot()
Get the root node - always a document node with this tree implementation
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getDocumentRoot
public DocumentInfo getDocumentRoot()
Get the root (document) node- Specified by:
getDocumentRoot
in interfaceNodeInfo
- Returns:
- the DocumentInfo representing the containing document
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hasChildNodes
public boolean hasChildNodes()
Determine whether the node has any children.
Note: the result is equivalent to
getEnumeration(Axis.CHILD, AnyNodeTest.getInstance()).hasNext()- Specified by:
hasChildNodes
in interfaceNodeInfo
- Returns:
- True if the node has one or more children
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generateId
public void generateId(FastStringBuffer buffer)
Get a character string that uniquely identifies this node. Note: a.isSameNode(b) if and only if generateId(a)==generateId(b)- Specified by:
generateId
in interfaceNodeInfo
- Parameters:
buffer
- a buffer, into which will be placed a string that uniquely identifies this node, within this document. The calling code prepends information to make the result unique across all documents.
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getDocumentNumber
public long getDocumentNumber()
Get the document number of the document containing this node. For a free-standing orphan node, just return the hashcode.- Specified by:
getDocumentNumber
in interfaceNodeInfo
- Returns:
- the document number of the document containing this node
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getDeclaredNamespaces
public NamespaceBinding[] getDeclaredNamespaces(NamespaceBinding[] buffer)
Get all namespace undeclarations and undeclarations defined on this element.- Specified by:
getDeclaredNamespaces
in interfaceNodeInfo
- Parameters:
buffer
- If this is non-null, and the result array fits in this buffer, then the result may overwrite the contents of this array, to avoid the cost of allocating a new array on the heap.- Returns:
- An array of integers representing the namespace declarations and undeclarations present on
this element. For a node other than an element, return null. Otherwise, the returned array is a
sequence of namespace codes, whose meaning may be interpreted by reference to the name pool. The
top half word of each namespace code represents the prefix, the bottom half represents the URI.
If the bottom half is zero, then this is a namespace undeclaration rather than a declaration.
The XML namespace is never included in the list. If the supplied array is larger than required,
then the first unused entry will be set to -1.
For a node other than an element, the method returns null.
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isId
public boolean isId()
Determine whether this node has the is-id property
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isIdref
public boolean isIdref()
Determine whether this node has the is-idref property
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