org.hypergraphdb.query
Class TypedValueCondition

java.lang.Object
  org.hypergraphdb.query.SimpleValueCondition
      org.hypergraphdb.query.AtomValueCondition
          org.hypergraphdb.query.TypedValueCondition

All Implemented Interfaces:

HGAtomPredicate, HGQueryCondition

public class TypedValueCondition
extends AtomValueCondition

This is a HGQueryCondition that constrains the value of an atom as well as its type. In general, the HyperGraph type system allows values to have multiple types. Two atoms X and Y can share the same value V without however having the same type. X may be of type T and Y may be of type S different than T. In such situations, when performing a query by value, a TypedValueCondition should be used instead of AtomValueCondition.

Author:

Borislav Iordanov

Constructor Summary

TypedValueCondition()

TypedValueCondition(java.lang.Class<?> javaClass, java.lang.Object value)

TypedValueCondition(java.lang.Class<?> javaClass, java.lang.Object value, ComparisonOperator op)

TypedValueCondition(HGHandle typeHandle, java.lang.Object value)

TypedValueCondition(HGHandle typeHandle, java.lang.Object value, ComparisonOperator op)

Method Summary

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

Methods inherited from class org.hypergraphdb.query.SimpleValueCondition

getOperator, getValue, setOperator, setValue

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TypedValueCondition

public TypedValueCondition()

TypedValueCondition

public TypedValueCondition(HGHandle typeHandle,
                           java.lang.Object value)

TypedValueCondition

public TypedValueCondition(java.lang.Class<?> javaClass,
                           java.lang.Object value)

TypedValueCondition

public TypedValueCondition(HGHandle typeHandle,
                           java.lang.Object value,
                           ComparisonOperator op)

TypedValueCondition

public TypedValueCondition(java.lang.Class<?> javaClass,
                           java.lang.Object value,
                           ComparisonOperator op)

Method Detail

satisfies

public boolean satisfies(HyperGraph hg,
                         HGHandle handle)

Description copied from interface: HGAtomPredicate

Check whether a given Object satisfies this query condition.

Specified by:

satisfies in interface HGAtomPredicate

Overrides:

satisfies in class AtomValueCondition

Parameters:

hg - The HyperGraph instance.

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

Returns:

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

setTypeHandle

public void setTypeHandle(HGHandle typeHandle)

getTypeHandle

public HGHandle getTypeHandle()

setJavaClass

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

getJavaClass

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

toString

public java.lang.String toString()

Overrides:

toString in class AtomValueCondition

hashCode

public int hashCode()

Overrides:

hashCode in class AtomValueCondition

equals

public boolean equals(java.lang.Object x)

Overrides:

equals in class AtomValueCondition