uk.ac.ed.epcc.webapp.jdbc.expr

Class LocateSQLValue

java.lang.Object

uk.ac.ed.epcc.webapp.jdbc.expr.LocateSQLValue

All Implemented Interfaces:

SQLValue<java.lang.Integer>, Targetted<java.lang.Integer>

public class LocateSQLValue
extends java.lang.Object
implements SQLValue<java.lang.Integer>

Create locate expression in SQL.

Constructor Summary

Constructors

Constructor and Description
LocateSQLValue(SQLValue<java.lang.String> substr, SQLValue<java.lang.String> str, SQLValue<java.lang.Integer> pos)

Method Summary

Modifier and Type	Method and Description
int	add(java.lang.StringBuilder sb, boolean qualify) Add the expression to a StringBuilder
boolean	equals(java.lang.Object obj)
java.util.List<PatternArgument>	getParameters(java.util.List<PatternArgument> list) Add parameters for this value to a list.
SQLValue	getPosition()
SQLFilter	getRequiredFilter() Get an SQLFilter required to be added to the filter set.
SQLValue	getString()
SQLValue	getSubstring()
java.lang.Class<java.lang.Integer>	getTarget() Get the type of the returned object as far as it is known.
int	hashCode()
java.lang.Integer	makeObject(java.sql.ResultSet rs, int loc) Extract a result of the expression from a ResultSet into an object of the specified type.
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

LocateSQLValue

public LocateSQLValue(SQLValue<java.lang.String> substr,
                      SQLValue<java.lang.String> str,
                      SQLValue<java.lang.Integer> pos)

Method Detail

add

public int add(java.lang.StringBuilder sb,
               boolean qualify)

Description copied from interface: SQLValue

Add the expression to a StringBuilder

Specified by:

add in interface SQLValue<java.lang.Integer>

Parameters:

sb - StringBuilder to modify

qualify - boolean should fields be qualified with the table name

Returns:

number of fields added

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

getTarget

public java.lang.Class<java.lang.Integer> getTarget()

Description copied from interface: Targetted

Get the type of the returned object as far as it is known. Normally this should be the erasure type corresponding to T.

Specified by:

getTarget in interface Targetted<java.lang.Integer>

Returns:

Class object for return type

makeObject

public java.lang.Integer makeObject(java.sql.ResultSet rs,
                                    int loc)
                             throws DataException,
                                    java.sql.SQLException

Description copied from interface: SQLValue

Extract a result of the expression from a ResultSet into an object of the specified type. Note that this method is also used to extract the result of functions over the result type.

Specified by:

makeObject in interface SQLValue<java.lang.Integer>

Parameters:

rs - ResultSet

Returns:

produced object

Throws:

DataException

java.sql.SQLException

getParameters

public java.util.List<PatternArgument> getParameters(java.util.List<PatternArgument> list)

Description copied from interface: SQLValue

Add parameters for this value to a list.

Specified by:

getParameters in interface SQLValue<java.lang.Integer>

Parameters:

list - to modify

Returns:

modified list of parameter objects

getRequiredFilter

public SQLFilter getRequiredFilter()

Description copied from interface: SQLValue

Get an SQLFilter required to be added to the filter set. This is usually to implement a join.

Specified by:

getRequiredFilter in interface SQLValue<java.lang.Integer>

Returns:

null or SQLFilter

getSubstring

public SQLValue getSubstring()

getString

public SQLValue getString()

getPosition

public SQLValue getPosition()

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object