com.caucho.xpath.pattern
Class FromPreviousSibling

java.lang.Object
  extended by com.caucho.xpath.pattern.AbstractPattern
      extended by com.caucho.xpath.pattern.FromPreviousSibling

public class FromPreviousSibling
extends AbstractPattern

matches if we can find a following sibling matching the parent pattern.


Field Summary
 
Fields inherited from class com.caucho.xpath.pattern.AbstractPattern
_child, _parent, log, XMLNS
 
Constructor Summary
FromPreviousSibling(AbstractPattern parent)
           
 
Method Summary
 AbstractPattern copyAxis()
          Returns the node itself for the axis.
 AbstractPattern copyPosition()
          Returns null since the axis isn't part of the position pattern.
 int count(org.w3c.dom.Node node, Env env, AbstractPattern pattern)
          Counts the nodes within the axis matching the pattern.
 NodeIterator createNodeIterator(org.w3c.dom.Node node, ExprEnvironment env, AbstractPattern match)
          Creates a new node iterator.
 org.w3c.dom.Node firstNode(org.w3c.dom.Node node, ExprEnvironment env)
          Returns the first node in the selection order.
 boolean isAscending()
          preceding-sibling's iterator is in reverse document order.
 boolean isStrictlyAscending()
          Returns true if the pattern is strictly ascending.
 boolean isUnique()
          Returns true if the pattern returns unique values.
 boolean match(org.w3c.dom.Node node, ExprEnvironment env)
          matches if we can find a following sibling that matches the parent.
 org.w3c.dom.Node nextNode(org.w3c.dom.Node node, org.w3c.dom.Node lastNOde)
          Returns the next node in the selection order.
 int position(org.w3c.dom.Node node, Env env, AbstractPattern pattern)
          The count of nodes between the test-node and the axis.
 java.lang.String toString()
           
 
Methods inherited from class com.caucho.xpath.pattern.AbstractPattern
findAny, getNodeName, getParent, getPrefix, getPriority, lastNode, select, selectUnique, toPatternString
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

FromPreviousSibling

public FromPreviousSibling(AbstractPattern parent)
Method Detail

match

public boolean match(org.w3c.dom.Node node,
                     ExprEnvironment env)
              throws XPathException
matches if we can find a following sibling that matches the parent.

Specified by:
match in class AbstractPattern
Parameters:
node - the current node
env - the variable environment
Returns:
true if the pattern matches
Throws:
XPathException

isAscending

public boolean isAscending()
preceding-sibling's iterator is in reverse document order.

Overrides:
isAscending in class AbstractPattern

isUnique

public boolean isUnique()
Returns true if the pattern returns unique values.


firstNode

public org.w3c.dom.Node firstNode(org.w3c.dom.Node node,
                                  ExprEnvironment env)
Returns the first node in the selection order.

Overrides:
firstNode in class AbstractPattern
Parameters:
node - the current node
Returns:
the first node

nextNode

public org.w3c.dom.Node nextNode(org.w3c.dom.Node node,
                                 org.w3c.dom.Node lastNOde)
Returns the next node in the selection order.

Overrides:
nextNode in class AbstractPattern
Parameters:
node - the current node
lastNode - the last node
Returns:
the next node

position

public int position(org.w3c.dom.Node node,
                    Env env,
                    AbstractPattern pattern)
             throws XPathException
The count of nodes between the test-node and the axis.

Parameters:
node - the current node
env - the variable environment
pattern - the position pattern
Returns:
the node's position.
Throws:
XPathException

toString

public java.lang.String toString()
Overrides:
toString in class java.lang.Object

count

public int count(org.w3c.dom.Node node,
                 Env env,
                 AbstractPattern pattern)
          throws XPathException
Counts the nodes within the axis matching the pattern.

Overrides:
count in class AbstractPattern
Parameters:
node - the current node
env - the variable environment
pattern - the position pattern
Returns:
the count of the node list.
Throws:
XPathException

createNodeIterator

public NodeIterator createNodeIterator(org.w3c.dom.Node node,
                                       ExprEnvironment env,
                                       AbstractPattern match)
                                throws XPathException
Creates a new node iterator.

Overrides:
createNodeIterator in class AbstractPattern
Parameters:
node - the starting node
env - the variable environment
match - the axis match pattern
Returns:
the node iterator
Throws:
XPathException

copyAxis

public AbstractPattern copyAxis()
Returns the node itself for the axis.

Overrides:
copyAxis in class AbstractPattern

copyPosition

public AbstractPattern copyPosition()
Returns null since the axis isn't part of the position pattern.

Overrides:
copyPosition in class AbstractPattern

isStrictlyAscending

public boolean isStrictlyAscending()
Returns true if the pattern is strictly ascending.

Overrides:
isStrictlyAscending in class AbstractPattern