org.dftproject.genesis.core.data.nodes
Class CompareExpression

java.lang.Object
  org.dftproject.genesis.core.data.nodes.CompareExpression

All Implemented Interfaces:

IExpression

public class CompareExpression
extends java.lang.Object
implements IExpression

An expression which matches objects according to a comparison.

Field Summary

static java.lang.String	EQ Match all objects equal to the given value.
static java.lang.String	GE Match all objects greater than or equal to the given value.
static java.lang.String	GT Match all objects strictly greater than the given value.
static java.lang.String	LE Match all objects less than or equal to the given value.
static java.lang.String	LT Match all objects strictly less than the given value.
static java.lang.String	NE Match all objects not equal to the given value.
java.lang.String	op The comparison operator.
java.lang.String	value The value to compare against.

Constructor Summary

CompareExpression(java.lang.String op, java.lang.String value)
Creates an expression that matches all objects compared to the given value with the given operator.

Method Summary

java.lang.String

getSQL(DataConnection conn, java.lang.String table) Returns the SQL fragment this expression represents.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

GE

public static final java.lang.String GE

Match all objects greater than or equal to the given value.

See Also:

Constant Field Values

GT

public static final java.lang.String GT

Match all objects strictly greater than the given value.

See Also:

Constant Field Values

LE

public static final java.lang.String LE

Match all objects less than or equal to the given value.

See Also:

Constant Field Values

LT

public static final java.lang.String LT

Match all objects strictly less than the given value.

See Also:

Constant Field Values

EQ

public static final java.lang.String EQ

Match all objects equal to the given value.

See Also:

Constant Field Values

NE

public static final java.lang.String NE

Match all objects not equal to the given value.

See Also:

Constant Field Values

op

public java.lang.String op

The comparison operator.

value

public java.lang.String value

The value to compare against.

Constructor Detail

CompareExpression

public CompareExpression(java.lang.String op,
                         java.lang.String value)

Creates an expression that matches all objects compared to the given value with the given operator.

Parameters:

op - the comparison operator

value - the value

Method Detail

getSQL

public java.lang.String getSQL(DataConnection conn,
                               java.lang.String table)

Description copied from interface: IExpression

Returns the SQL fragment this expression represents.

Specified by:

getSQL in interface IExpression

Parameters:

conn - a data connection

table - alias of the table this expression uses

Returns:

SQL fragment