Package org.intermine.objectstore.query

Class QueryValue

java.lang.Object

org.intermine.objectstore.query.QueryValue

All Implemented Interfaces:

QueryEvaluable, QueryNode, QueryOrderable, QuerySelectable

public class QueryValue
extends java.lang.Object
implements QueryEvaluable

Represents a constant in a Query

Author:

Mark Woodbridge, Richard Smith, Matthew Wakeling

Field Summary

Fields

Modifier and Type	Field	Description
static QueryValue	FALSE	The false value
static QueryValue	TRUE	The true value

Constructor Summary

Constructors

Constructor	Description
QueryValue(java.lang.Object value)	Construct a QueryValue

Method Summary

Modifier and Type	Method	Description
boolean	equals(java.lang.Object obj)	Overrides Object.
int	getApproximateType()	Returns an integer representing the approximate type of this QueryEvaluable, in the case where an accurate type cannot be ascertained.
java.lang.Class<?>	getType()	Get Java type represented by this item.
java.lang.Object	getValue()	Returns the object that is the actual value.
int	hashCode()	Overrides Object.
java.lang.String	toString()
void	youAreType(java.lang.Class<?> cls)	Allows a caller to suggest to this object that it holds a value of a certain type.

Methods inherited from class java.lang.Object

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

Field Detail

TRUE

public static final QueryValue TRUE

The true value

FALSE

public static final QueryValue FALSE

The false value

Constructor Detail

QueryValue

public QueryValue(java.lang.Object value)

Construct a QueryValue

Parameters:

value - the value of this QueryValue

Throws:

java.lang.IllegalArgumentException - if value is not a Number, String, Boolean or Date

Method Detail

getType

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

Get Java type represented by this item.

Specified by:

getType in interface QueryOrderable

Specified by:

getType in interface QuerySelectable

Returns:

class describing the type

getValue

public java.lang.Object getValue()

Returns the object that is the actual value.

Returns:

the value

equals

public boolean equals(java.lang.Object obj)

Overrides Object.

Overrides:

equals in class java.lang.Object

Parameters:

obj - object to compare to

Returns:

true if obj is a QueryValue with the same encapsulated object

hashCode

public int hashCode()

Overrides Object.

Overrides:

hashCode in class java.lang.Object

Returns:

an integer based on the contents of this object

youAreType

public void youAreType(java.lang.Class<?> cls)

Allows a caller to suggest to this object that it holds a value of a certain type. This method should only be called on objects which report their type to be UnknownTypeValue. Otherwise, this method will throw and exception.

Specified by:

youAreType in interface QueryEvaluable

Parameters:

cls - the Class of the type to be imposed on this object

getApproximateType

public int getApproximateType()

Returns an integer representing the approximate type of this QueryEvaluable, in the case where an accurate type cannot be ascertained.

Specified by:

getApproximateType in interface QueryEvaluable

Returns:

an int, as described in UnknownTypeValue

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object