com.metamatrix.query.sql.lang
Class AbstractCompareCriteria

java.lang.Object
  com.metamatrix.query.sql.lang.Criteria
      com.metamatrix.query.sql.lang.PredicateCriteria
          com.metamatrix.query.sql.lang.AbstractCompareCriteria

All Implemented Interfaces:

LanguageObject, java.io.Serializable, java.lang.Cloneable

Direct Known Subclasses:

CompareCriteria, SubqueryCompareCriteria

public abstract class AbstractCompareCriteria
extends PredicateCriteria

The common functionality of a CompareCriteria and a SubqueryCompareCriteria. The comparison operators are defined here.

See Also:

Serialized Form

Field Summary

static int	EQ Constant indicating the two operands are equal.
static int	GE Constant indicating the first operand is greater than or equal to the second.
static int	GT Constant indicating the first operand is greater than the second.
static int	LE Constant indicating the first operand is less than or equal to the second.
static int	LT Constant indicating the first operand is less than the second.
static int	NE Constant indicating the two operands are not equal.

Constructor Summary

AbstractCompareCriteria()

Method Summary

Expression	getLeftExpression() Get left expression.
int	getOperator() Returns the operator.
static int	getOperator(java.lang.String op) Gets the operator constant given the string version
java.lang.String	getOperatorAsString() Returns the operator as a string.
abstract Expression	getRightExpression()
void	setLeftExpression(Expression expression) Set left expression.
void	setOperator(int operator) Sets the operator.

Methods inherited from class com.metamatrix.query.sql.lang.PredicateCriteria

clone

Methods inherited from class com.metamatrix.query.sql.lang.Criteria

combineCriteria, combineCriteria, combineCriteria, separateCriteriaByAnd, toConjunctiveNormalForm, toDisjunctiveNormalForm, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.metamatrix.query.sql.LanguageObject

acceptVisitor

Field Detail

EQ

public static final int EQ

Constant indicating the two operands are equal.

See Also:

Constant Field Values

NE

public static final int NE

Constant indicating the two operands are not equal.

See Also:

Constant Field Values

LT

public static final int LT

Constant indicating the first operand is less than the second.

See Also:

Constant Field Values

GT

public static final int GT

Constant indicating the first operand is greater than the second.

See Also:

Constant Field Values

LE

public static final int LE

Constant indicating the first operand is less than or equal to the second.

See Also:

Constant Field Values

GE

public static final int GE

Constant indicating the first operand is greater than or equal to the second.

See Also:

Constant Field Values

Constructor Detail

AbstractCompareCriteria

public AbstractCompareCriteria()

Method Detail

getOperator

public int getOperator()

Returns the operator.

Returns:

The operator

setOperator

public void setOperator(int operator)

Sets the operator.

Parameters:

operator -

getOperator

public static int getOperator(java.lang.String op)

Gets the operator constant given the string version

Parameters:

op - Operator, string form

Returns:

Operator, constant form

setLeftExpression

public void setLeftExpression(Expression expression)

Set left expression.

Parameters:

expression - Left expression

getLeftExpression

public Expression getLeftExpression()

Get left expression.

Returns:

Left expression

getRightExpression

public abstract Expression getRightExpression()

getOperatorAsString

public java.lang.String getOperatorAsString()

Returns the operator as a string.

Returns:

String version of operator