com.caucho.xpath.pattern
Class FromAttributes

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

public class FromAttributes
extends AbstractPattern

matches attributes of an element.


Field Summary
 
Fields inherited from class com.caucho.xpath.pattern.AbstractPattern
_child, _parent, log, XMLNS
 
Constructor Summary
FromAttributes(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 all siblings matching the pattern.
 NodeIterator createNodeIterator(org.w3c.dom.Node node, ExprEnvironment env, AbstractPattern match)
          Creates a new node iterator.
 boolean equals(java.lang.Object b)
          Returns true if the two patterns are equal.
 org.w3c.dom.Node firstNode(org.w3c.dom.Node node, ExprEnvironment env)
          Returns the first node in the selection order.
 boolean isStrictlyAscending()
          Returns true if the pattern is strictly ascending.
 boolean isUnique()
          Returns true if the pattern's selector returns unique nodes.
 boolean match(org.w3c.dom.Node node, ExprEnvironment env)
          matches if the node is an attribute.
 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 position of the child is the count of previous siblings matching the pattern.
 java.lang.String toString()
           
 
Methods inherited from class com.caucho.xpath.pattern.AbstractPattern
findAny, getNodeName, getParent, getPrefix, getPriority, isAscending, lastNode, select, selectUnique, toPatternString
 
Methods inherited from class java.lang.Object
clone, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
 

Constructor Detail

FromAttributes

public FromAttributes(AbstractPattern parent)
Method Detail

match

public boolean match(org.w3c.dom.Node node,
                     ExprEnvironment env)
              throws XPathException
matches if the node is an attribute.

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

position

public int position(org.w3c.dom.Node node,
                    Env env,
                    AbstractPattern pattern)
             throws XPathException
The position of the child is the count of previous siblings matching the pattern. Technically, attributes don't have positions, but our DOM allows it.

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

count

public int count(org.w3c.dom.Node node,
                 Env env,
                 AbstractPattern pattern)
          throws XPathException
counts all siblings matching the pattern.

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.

Parameters:
node - the starting node
env - the variable environment
match - the axis match pattern
Returns:
the node iterator
Throws:
XPathException

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

isStrictlyAscending

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


equals

public boolean equals(java.lang.Object b)
Returns true if the two patterns are equal.

Overrides:
equals in class java.lang.Object

toString

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

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

isUnique

public boolean isUnique()
Returns true if the pattern's selector returns unique nodes.

Overrides:
isUnique in class AbstractPattern