org.deegree.sqldialect.filter.expression
Class SQLOperation

java.lang.Object
  org.deegree.sqldialect.filter.expression.SQLOperation

All Implemented Interfaces:

SQLExpression

public class SQLOperation
extends Object
implements SQLExpression

SQLExpression that represents an operation, e.g. an addition, an intersects predicate or a distance calculation.

Version:

$Revision: 31370 $, $Date: 2011-07-28 19:37:13 +0200 (Do, 28. Jul 2011) $

Author:

Markus Schneider, last edited by: $Author: mschneider $

Constructor Summary

SQLOperation(List<Object> particles)

Method Summary

void	cast(SQLExpression expr) Propagates type information to this expression (=performs a type cast).
List<SQLArgument>	getArguments() Returns the SQLArgument instances that occur in the expression, in same order as in the SQL snippet.
ParticleConverter	getConverter() Returns the attached particle converter for this expression.
CRS	getCRS() Returns the CRS of the expression (only for spatial ones).
PrimitiveType	getPrimitiveType() Returns the primitive type of this expression.
StringBuilder	getSQL() Returns the corresponding SQL snippet, with question marks for every SQLArgument argument (as required for JDBC PreparedStatements).
String	getSRID() Returns the databases' SRID of the expression (only for spatial ones).
boolean	isMultiValued() Returns whether the expression has multiple values (currently this can only be a string column that stores multiple values in concatenated form).
boolean	isSpatial() Returns whether the expression denotes a spatial value.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

SQLOperation

public SQLOperation(List<Object> particles)

Method Detail

isSpatial

public boolean isSpatial()

Description copied from interface: SQLExpression

Returns whether the expression denotes a spatial value.

Specified by:

isSpatial in interface SQLExpression

Returns:

true, if the expression is spatial, false otherwise

isMultiValued

public boolean isMultiValued()

Description copied from interface: SQLExpression

Returns whether the expression has multiple values (currently this can only be a string column that stores multiple values in concatenated form).

Specified by:

isMultiValued in interface SQLExpression

Returns:

true, if the expresion is multi-valued, false otherwise

toString

public String toString()

Overrides:

toString in class Object

getArguments

public List<SQLArgument> getArguments()

Description copied from interface: SQLExpression

Returns the SQLArgument instances that occur in the expression, in same order as in the SQL snippet.

Specified by:

getArguments in interface SQLExpression

Returns:

the SQL literals, never null

See Also:

SQLExpression.getSQL()

getSQL

public StringBuilder getSQL()

Description copied from interface: SQLExpression

Returns the corresponding SQL snippet, with question marks for every SQLArgument argument (as required for JDBC PreparedStatements).

Specified by:

getSQL in interface SQLExpression

Returns:

the corresponding SQL snippet, never null

See Also:

SQLExpression.getArguments()

getCRS

public CRS getCRS()

Description copied from interface: SQLExpression

Returns the CRS of the expression (only for spatial ones).

Specified by:

getCRS in interface SQLExpression

Returns:

the CRS, can be null (unknown or not a spatial expression)

getSRID

public String getSRID()

Description copied from interface: SQLExpression

Returns the databases' SRID of the expression (only for spatial ones).

Specified by:

getSRID in interface SQLExpression

Returns:

the SRID, can be null (unknown or not a spatial expression)

getPrimitiveType

public PrimitiveType getPrimitiveType()

Description copied from interface: SQLExpression

Returns the primitive type of this expression.

Specified by:

getPrimitiveType in interface SQLExpression

Returns:

the primitive type, can be null (no type information / spatial)

cast

public void cast(SQLExpression expr)

Description copied from interface: SQLExpression

Propagates type information to this expression (=performs a type cast).

Specified by:

cast in interface SQLExpression

Parameters:

expr - type information to be applied, must not be null

getConverter

public ParticleConverter getConverter()

Description copied from interface: SQLExpression

Returns the attached particle converter for this expression.

Specified by:

getConverter in interface SQLExpression

Returns:

particle converter, can be null