org.openrdf.sesame.sail.query
Class Like

java.lang.Object
  org.openrdf.sesame.sail.query.Like

All Implemented Interfaces:

BooleanExpr

public class Like

extends Object

implements BooleanExpr

Compares the string representation of an expression to a pattern.

Constructor Summary

Like(StringExpr expr, StringConstant pattern, boolean ignoreCase)

Method Summary

boolean	caseSensitive()
String	getPattern()
StringExpr	getStringExpr()
void	getVariables(Collection variables) Gets all variables that are used in this BooleanExpr.
boolean	isTrue(RdfSource rdfSource) Determines whether the two operands match according to the like operator.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

Like

public Like(StringExpr expr,
            StringConstant pattern,
            boolean ignoreCase)

Method Detail

getVariables

public void getVariables(Collection variables)

Description copied from interface: BooleanExpr

Gets all variables that are used in this BooleanExpr.

Specified by:

getVariables in interface BooleanExpr

Parameters:

variables - A Collection to add the Var objects to.

getStringExpr

public StringExpr getStringExpr()

getPattern

public String getPattern()

caseSensitive

public boolean caseSensitive()

isTrue

public boolean isTrue(RdfSource rdfSource)
               throws BooleanExprEvaluationException,
                      SailQueryException

Determines whether the two operands match according to the like operator. The operator is defined as a string comparison with the possible use of an asterisk (*) at the end and/or the start of the second operand to indicate substring matching.

Specified by:

isTrue in interface BooleanExpr

Parameters:

rdfSource - The RdfSource to evaluate the boolean expression against.

Returns:

true if the operands match according to the like operator, false otherwise.

Throws:

BooleanExprEvaluationException - If the boolean expression could not be evaluated, for example when comparing two incompatible operands. When thrown, the result of the boolean expression is neither true or false, but unknown.

SailQueryException

toString

public String toString()