kodo.jdbc.query
Interface JDBCValue

All Superinterfaces:

Value

All Known Implementing Classes:

Constant

public interface JDBCValue

extends Value

A Value represents any non-operator in a query filter, including constants, variables, and object fields.

Method Summary

void	appendIsEmpty(SQLBuffer sql) Append the SQL testing whether this value is empty to the given buffer.
void	appendIsNotNull(SQLBuffer sql) Append the SQL testing whether this value is not null to the given buffer.
void	appendIsNull(SQLBuffer sql) Append the SQL testing whether this value is null to the given buffer.
void	appendTo(SQLBuffer sql, int index) Append the SQL for this value to the given buffer.
void	calculateValue(KodoPersistenceManager pm, Map params, JDBCValue other) Calculate and cache the SQL for this value.
void	castTo(Class cls) Cast this value to the given type.
Object	getDataStoreValue(Object val, KodoPersistenceManager pm) Transform the given value into its datastore equivalent.
Joins	getJoins() Return the joins for this value.
void	initialize(KodoPersistenceManager pm, Select select, boolean nullTest) Initialize the value.
int	length() Return the number of SQL elements in this value.
Object	load(Result res, JDBCStoreManager store, JDBCFetchConfiguration fetch) Load the data for this value.
void	select(Select sel, JDBCStoreManager store, JDBCFetchConfiguration fetch) Select the data for this value.

Methods inherited from interface kodo.query.Value

getMetaData, isVariable, setMetaData

Method Detail

castTo

public void castTo(Class cls)

Cast this value to the given type.

initialize

public void initialize(KodoPersistenceManager pm,
                       Select select,
                       boolean nullTest)

Initialize the value. This method should recursively initialize any sub-values. It should also cache the Joins instance containing the joins for this value.

Parameters:

pm - the persistence manager for the query

select - used to create Joins instances

nullTest - if true, then this value will be compared to null or tested for emptiness

calculateValue

public void calculateValue(KodoPersistenceManager pm,
                           Map params,
                           JDBCValue other)

Calculate and cache the SQL for this value.

length

public int length()

Return the number of SQL elements in this value.

appendTo

public void appendTo(SQLBuffer sql,
                     int index)

Append the SQL for this value to the given buffer.

appendIsEmpty

public void appendIsEmpty(SQLBuffer sql)

Append the SQL testing whether this value is empty to the given buffer.

appendIsNull

public void appendIsNull(SQLBuffer sql)

Append the SQL testing whether this value is null to the given buffer.

appendIsNotNull

public void appendIsNotNull(SQLBuffer sql)

Append the SQL testing whether this value is not null to the given buffer.

getJoins

public Joins getJoins()

Return the joins for this value. These joins should be created and cached during the initialize(kodo.runtime.KodoPersistenceManager, kodo.jdbc.sql.Select, boolean) method. The parent expression might modify these joins during its own initialization so that common joins are moved up the expression tree. These joins should not be included in the SQL appended through any of the append methods.

getDataStoreValue

public Object getDataStoreValue(Object val,
                                KodoPersistenceManager pm)

Transform the given value into its datastore equivalent.

select

public void select(Select sel,
                   JDBCStoreManager store,
                   JDBCFetchConfiguration fetch)

Select the data for this value.

load

public Object load(Result res,
                   JDBCStoreManager store,
                   JDBCFetchConfiguration fetch)
            throws SQLException

Load the data for this value.