org.datanucleus.store.rdbms.sql.method
Class StringTrimMethod

java.lang.Object
  org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod
      org.datanucleus.store.rdbms.sql.method.SimpleStringMethod
          org.datanucleus.store.rdbms.sql.method.StringTrimMethod

All Implemented Interfaces:

SQLMethod

public class StringTrimMethod
extends SimpleStringMethod

Expression handler to invoke the SQL TRIM function. For use in evaluating StringExpression.trim() where the RDBMS supports this function. Returns a StringExpression "TRIM({stringExpr})".

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

clr, exprFactory, LOCALISER, stmt

Constructor Summary

StringTrimMethod()

Method Summary

SQLExpression	getExpression(SQLExpression expr, List args) Return the expression for this SQL function.
protected String	getFunctionName()

Methods inherited from class org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

getMappingForClass, setStatement

Methods inherited from class java.lang.Object

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

Constructor Detail

StringTrimMethod

public StringTrimMethod()

Method Detail

getFunctionName

protected String getFunctionName()

Specified by:

getFunctionName in class SimpleStringMethod

getExpression

public SQLExpression getExpression(SQLExpression expr,
                                   List args)

Description copied from interface: SQLMethod

Return the expression for this SQL function.

Specified by:

getExpression in interface SQLMethod

Overrides:

getExpression in class SimpleStringMethod

Parameters:

expr - The expression that it is invoked on

args - Arguments passed in

Returns:

The SQL expression using the SQL function