org.gcube.data.trees.patterns
Class OnePattern

java.lang.Object
  org.gcube.data.trees.patterns.EdgePattern
      org.gcube.data.trees.patterns.OnePattern

All Implemented Interfaces:

Serializable

public class OnePattern
extends EdgePattern

A Pattern that matches Nodes that have a single edge with a given label and a target that matches a given Pattern.

Nodes that have many edges with the given label do not match this pattern, even if there is at most one edge whose target matches the given pattern.

Author:

Fabio Simeoni

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.gcube.data.trees.patterns.EdgePattern

EdgePattern.Range

Constructor Summary

OnePattern(QName l, Pattern predicate)
Creates an instance for a given label and pattern.

Method Summary

boolean	matches(List<Edge> edges) Indicates whether the pattern matches some of the edges in a given list.
String	name() Returns the name of the pattern.
List<Edge>	prune(List<Edge> edges) Returns the edges from a given list which match the pattern.
EdgePattern.Range	range() Returns the EdgePattern.Range of the pattern.

Methods inherited from class org.gcube.data.trees.patterns.EdgePattern

equals, hashCode, isCondition, label, matchLabels, pattern, setAsCondition, setPattern, toString, unsetAsCondition

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

OnePattern

public OnePattern(QName l,
                  Pattern predicate)

Creates an instance for a given label and pattern.

Parameters:

l - the label

predicate - the pattern

Method Detail

matches

public boolean matches(List<Edge> edges)

Indicates whether the pattern matches some of the edges in a given list.

Parameters:

edges - the list.

Returns:

true if it does, false otherwise.

prune

public List<Edge> prune(List<Edge> edges)
                 throws Exception

Returns the edges from a given list which match the pattern.

Parameters:

edges - the list.

Returns:

the matching edges.

Throws:

Exception - if an attempt to match an edge fails with an error.

range

public EdgePattern.Range range()

Returns the EdgePattern.Range of the pattern.

Specified by:

range in class EdgePattern

Returns:

the range.

name

public String name()

Returns the name of the pattern.

Specified by:

name in class EdgePattern

Returns:

the name