|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |
java.lang.Object | +--org.apache.commons.jxpath.ri.model.NodePointer | +--org.apache.commons.jxpath.ri.model.beans.PropertyOwnerPointer | +--org.apache.commons.jxpath.ri.model.beans.NullElementPointer
Used when there is a need to construct a Pointer for a collection element that does not exist. For example, if the path is "foo[3]", but the collection "foo" only has one element or is empty or is null, the NullElementPointer can be used to capture this situatuin without putting a regular NodePointer into an invalid state. Just create a NullElementPointer with index 2 (= 3 - 1) and a "foo" pointer as the parent.
Field Summary |
Fields inherited from class org.apache.commons.jxpath.ri.model.NodePointer |
index, locale, parent, UNKNOWN_NAMESPACE, WHOLE_COLLECTION |
Constructor Summary | |
NullElementPointer(NodePointer parent,
int index)
|
Method Summary | |
java.lang.String |
asPath()
Returns an XPath that maps to this Pointer. |
NodePointer |
createChild(JXPathContext context,
QName name,
int index)
Called by a child pointer when it needs to create a parent object for a non-existent collection element. |
NodePointer |
createChild(JXPathContext context,
QName name,
int index,
java.lang.Object value)
Called by a child pointer if that child needs to assign the value supplied in the createPath(context, value) call to a non-existent node. |
NodePointer |
createPath(JXPathContext context)
Called by a child pointer when it needs to create a parent object. |
NodePointer |
createPath(JXPathContext context,
java.lang.Object value)
Called directly by JXPathContext. |
boolean |
equals(java.lang.Object object)
|
java.lang.Object |
getBaseValue()
Returns the value represented by the pointer before indexing. |
int |
getLength()
If the pointer represents a collection (or collection element), returns the length of the collection. |
QName |
getName()
Returns the name of this node. |
java.lang.Object |
getNodeValue()
Returns the object the pointer points to; does not convert it to a "canonical" type. |
PropertyPointer |
getPropertyPointer()
|
NodePointer |
getValuePointer()
If this pointer manages a transparent container, like a variable, this method returns the pointer to the contents. |
int |
hashCode()
|
boolean |
isActual()
An actual pointer points to an existing part of an object graph, even if it is null. |
boolean |
isNode()
If false, this node is axiliary and can only be used as an intermediate in the chain of pointers. |
void |
setValue(java.lang.Object value)
Converts the value to the required type and changes the corresponding object to that value. |
Methods inherited from class org.apache.commons.jxpath.ri.model.beans.PropertyOwnerPointer |
attributeIterator, childIterator, compareChildNodePointers, isCollection, setIndex |
Methods inherited from class org.apache.commons.jxpath.ri.model.NodePointer |
clone, compareTo, getDefaultNamespaceURI, getExpandedName, getIndex, getLocale, getNamespaceURI, getNamespaceURI, getParent, getPointerByID, getPointerByKey, getValue, isDefaultNamespace, isLanguage, isLeaf, isRoot, namespaceIterator, namespacePointer, newChildNodePointer, newNodePointer, printPointerChain, remove, testNode, toString |
Methods inherited from class java.lang.Object |
finalize, getClass, notify, notifyAll, wait, wait, wait |
Constructor Detail |
public NullElementPointer(NodePointer parent, int index)
Method Detail |
public QName getName()
NodePointer
getName
in class PropertyOwnerPointer
public java.lang.Object getBaseValue()
NodePointer
getBaseValue
in class NodePointer
public java.lang.Object getNodeValue()
NodePointer
getNodeValue
in class PropertyOwnerPointer
public PropertyPointer getPropertyPointer()
getPropertyPointer
in class PropertyOwnerPointer
public NodePointer getValuePointer()
NodePointer
getValuePointer
in class NodePointer
public void setValue(java.lang.Object value)
NodePointer
setValue
in interface Pointer
setValue
in class PropertyOwnerPointer
public boolean isActual()
NodePointer
isActual
in class NodePointer
public boolean isNode()
NodePointer
isNode
in class NodePointer
public NodePointer createPath(JXPathContext context, java.lang.Object value)
NodePointer
createPath
in class NodePointer
public NodePointer createPath(JXPathContext context)
NodePointer
createPath
in class NodePointer
public NodePointer createChild(JXPathContext context, QName name, int index, java.lang.Object value)
NodePointer
createChild
in class PropertyOwnerPointer
public NodePointer createChild(JXPathContext context, QName name, int index)
NodePointer
createChild
in class PropertyOwnerPointer
public int hashCode()
hashCode
in class java.lang.Object
public boolean equals(java.lang.Object object)
equals
in class java.lang.Object
public java.lang.String asPath()
NodePointer
asPath
in interface Pointer
asPath
in class NodePointer
public int getLength()
NodePointer
getLength
in class NodePointer
|
||||||||||
PREV CLASS NEXT CLASS | FRAMES NO FRAMES | |||||||||
SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD |