net.sf.mmm.util.query.base

Class QueryImpl<R,E,T>

java.lang.Object

net.sf.mmm.util.query.base.QueryImpl<R,E,T>

Type Parameters:

R - the generic type of the result.

E - the generic type of a single selection of the AbstractSelectStatement.

T - the generic type of the internal results.

All Implemented Interfaces:

Command, Query<R>

Direct Known Subclasses:

ListQueryImpl, NumberQueryImpl, SingleQueryImpl

public class QueryImpl<R,E,T>
extends Object
implements Query<R>

This is the implementation of Query.

Since:

8.0.0

Author:

hohwille

Field Summary

Fields

Modifier and Type	Field and Description
private QueryMode	mode
private String	sql
private AbstractSelectStatement<E,?,T>	statement

Constructor Summary

Constructors

Constructor and Description
QueryImpl(AbstractSelectStatement<E,?,T> statement, String sql, QueryMode mode) The constructor.

Method Summary

Modifier and Type	Method and Description
R	execute() Executes the Query Command and returns the result.
protected Object	executeInternal()
QueryMode	getMode()
String	getSql()
protected AbstractSelectStatement<E,?,T>	getStatement()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

statement

private final AbstractSelectStatement<E,?,T> statement

sql

private final String sql

mode

private final QueryMode mode

Constructor Detail

QueryImpl

public QueryImpl(AbstractSelectStatement<E,?,T> statement,
                 String sql,
                 QueryMode mode)

The constructor.

Parameters:

statement - the AbstractSelectStatement that created this Query.

sql - the SQL of the statement.

mode - the QueryMode.

Method Detail

getSql

public String getSql()

Specified by:

getSql in interface Command

Returns:

the current SQL String of this Command. In case of a Statement it may only be an SQL fragment as the final operation such as FeatureFetch.fetch() will complete the statement.

getMode

public QueryMode getMode()

Returns:

the QueryMode.

getStatement

protected AbstractSelectStatement<E,?,T> getStatement()

Returns:

the original AbstractSelectStatement that created this Query. Please note that the statement can be modified after creating this Query and can also create additional queries. Hence use getSql() from this Query instead of retrieving the SQL from this statement.

execute

public R execute()

Description copied from interface: Query

Executes the Query Command and returns the result.

Specified by:

execute in interface Query<R>

Returns:

the result of the Query execution.

executeInternal

protected Object executeInternal()

Returns:

the untyped result of execute().

See Also:

execute()

toString

public String toString()

Overrides:

toString in class Object