org.hypergraphdb.query
Class AtomTypeCondition

java.lang.Object
  org.hypergraphdb.query.AtomTypeCondition

All Implemented Interfaces:

HGAtomPredicate, HGQueryCondition

public class AtomTypeCondition
extends java.lang.Object
implements HGQueryCondition, HGAtomPredicate

An AtomTypeCondition examines the type of a given atom and evaluates to true or false depending on whether the type of the atom matches exactly (i.e. has the same type handle) as that of the condition. Note that this condition looks at the concrete type of the atom and ignores and sub-typing relationships.

The type can be specified either as a HyperGraph handle or as a Java class. In the latter, the corresponding HyperGraph will be retrieved at appropriate times.

Author:

Borislav Iordanov

Constructor Summary

AtomTypeCondition()

AtomTypeCondition(java.lang.Class<?> javaClass)

AtomTypeCondition(HGHandle typeHandle)

Method Summary

boolean	equals(java.lang.Object x)
java.lang.Class<?>	getJavaClass()
HGHandle	getTypeHandle()
int	hashCode()
boolean	satisfies(HyperGraph hg, HGHandle value) Check whether a given Object satisfies this query condition.
void	setJavaClass(java.lang.Class<?> c)
void	setTypeHandle(HGHandle handle)
java.lang.String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AtomTypeCondition

public AtomTypeCondition()

AtomTypeCondition

public AtomTypeCondition(java.lang.Class<?> javaClass)

AtomTypeCondition

public AtomTypeCondition(HGHandle typeHandle)

Method Detail

setJavaClass

public void setJavaClass(java.lang.Class<?> c)

getJavaClass

public java.lang.Class<?> getJavaClass()

setTypeHandle

public void setTypeHandle(HGHandle handle)

getTypeHandle

public HGHandle getTypeHandle()

satisfies

public boolean satisfies(HyperGraph hg,
                         HGHandle value)

Description copied from interface: HGAtomPredicate

Check whether a given Object satisfies this query condition.

Specified by:

satisfies in interface HGAtomPredicate

Parameters:

hg - The HyperGraph instance.

value - The atom on which to test the query condition.

Returns:

true if the passed in parameter satisfies the condition and false otherwise.

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object x)

Overrides:

equals in class java.lang.Object

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object