org.da.sparqlhelper.sparql.model.expressions

Class ComparisonExpression

java.lang.Object

org.da.sparqlhelper.sparql.model.expressions.AbstractExpression

org.da.sparqlhelper.sparql.model.expressions.ComparisonExpression

All Implemented Interfaces:

Expression

public class ComparisonExpression
extends AbstractExpression

Represent a comparison expression appearing in a BIND, FILTER, or COALESCE construct.

Since:

0.1

Field Summary

Fields

Modifier and Type	Field and Description
static short	EQUAL The "=" comparator.
static short	GREATER The ">" comparator.
static short	GREATER_OR_EQUAL The ">=" comparator.
static short	LESS The "<" comparator.
static short	LESS_OR_EQUAL The "<=" comparator.
static short	NOT_EQUAL The "!

Fields inherited from class org.da.sparqlhelper.sparql.model.expressions.AbstractExpression

operator

Fields inherited from interface org.da.sparqlhelper.sparql.model.expressions.Expression

AND, DEFAULT, DIVIDE, MINUS, MULTIPLY, NOT, OR, PLUS

Constructor Summary

Constructors

Constructor and Description
ComparisonExpression(Expression expr1, short comparator, Expression expr2)
ComparisonExpression(short comparator)

Method Summary

Modifier and Type	Method and Description
void	addExpression(Expression expr)
void	appendContent(java.lang.String schema, java.lang.StringBuilder buf) Append the expression content to a buffer.
boolean	checkValidity(ISparqlRequestGroup request) Return true if the expression is valid.
short	getComparator() Return the comparator.
Expression	getFirstExpression() Return the first expression.
Expression	getSecondExpression() Return the second expression.
void	setFirstExpression(Expression expr1) Set the first expression.
void	setSecondExpression(Expression expr2) Set the second expression.

Methods inherited from class org.da.sparqlhelper.sparql.model.expressions.AbstractExpression

getOperator, setOperator

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.da.sparqlhelper.sparql.model.expressions.Expression

getContent, getOperatorAsString, getOperatorAsString, isSimpleExpression

Field Detail

EQUAL

public static final short EQUAL

The "=" comparator.

See Also:

Constant Field Values

NOT_EQUAL

public static final short NOT_EQUAL

The "!=" comparator.

See Also:

Constant Field Values

LESS

public static final short LESS

The "<" comparator.

See Also:

Constant Field Values

LESS_OR_EQUAL

public static final short LESS_OR_EQUAL

The "<=" comparator.

See Also:

Constant Field Values

GREATER

public static final short GREATER

The ">" comparator.

See Also:

Constant Field Values

GREATER_OR_EQUAL

public static final short GREATER_OR_EQUAL

The ">=" comparator.

See Also:

Constant Field Values

Constructor Detail

ComparisonExpression

public ComparisonExpression(short comparator)

ComparisonExpression

public ComparisonExpression(Expression expr1,
                            short comparator,
                            Expression expr2)

Method Detail

addExpression

public void addExpression(Expression expr)

setFirstExpression

public void setFirstExpression(Expression expr1)

Set the first expression.

Parameters:

expr1 - the first expression

getFirstExpression

public Expression getFirstExpression()

Return the first expression.

Returns:

the first expression

setSecondExpression

public void setSecondExpression(Expression expr2)

Set the second expression.

Parameters:

expr2 - the second expression

getSecondExpression

public Expression getSecondExpression()

Return the second expression.

Returns:

the second expression

getComparator

public short getComparator()

Return the comparator.

Returns:

the comparator

checkValidity

public boolean checkValidity(ISparqlRequestGroup request)

Return true if the expression is valid.

Parameters:

request - the request

Returns:

true if the expression is valid

appendContent

public void appendContent(java.lang.String schema,
                          java.lang.StringBuilder buf)

Append the expression content to a buffer.

Parameters:

schema - the schema

buf - the buffer