org.basex.server

Class LocalQuery

java.lang.Object

org.basex.server.Query

org.basex.server.LocalQuery

public class LocalQuery
extends Query

This class defines all methods for iteratively evaluating queries locally. All data is interpreted by the QueryListener.

Author:

BaseX Team 2005-12, BSD License, Rositsa Shadura, Dimitar Popov

Field Summary

Fields inherited from class org.basex.server.Query

cache, out, pos

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	LocalQuery(java.lang.String q, Context ctx, java.io.OutputStream o) Constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	bind(java.lang.String n, java.lang.Object v, java.lang.String t) Binds a value with an optional type to an external variable.
protected void	cache() Caches the query result.
void	close() Closes the query.
void	context(java.lang.Object v, java.lang.String t) Binds a value with an optional type to an external variable.
java.lang.String	execute() Returns the complete result of the query.
java.lang.String	info() Returns query info.
java.lang.String	options() Returns the serialization options.
boolean	updating() Returns true if the query may perform updates.

Methods inherited from class org.basex.server.Query

bind, cache, context, more, next

Methods inherited from class java.lang.Object

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

Constructor Detail

LocalQuery

protected LocalQuery(java.lang.String q,
          Context ctx,
          java.io.OutputStream o)

Constructor. Query output will be written to the provided output stream. All methods will return null.

Parameters:

q - query string

ctx - database context

o - output stream to write query output

Method Detail

bind

public void bind(java.lang.String n,
        java.lang.Object v,
        java.lang.String t)
          throws java.io.IOException

Description copied from class: Query

Binds a value with an optional type to an external variable.

Specified by:

bind in class Query

Parameters:

n - name of variable

v - value to be bound

t - data type (may be null)

Throws:

java.io.IOException - I/O exception

context

public void context(java.lang.Object v,
           java.lang.String t)
             throws java.io.IOException

Description copied from class: Query

Binds a value with an optional type to an external variable.

Specified by:

context in class Query

Parameters:

v - value to be bound

t - data type (may be null)

Throws:

java.io.IOException - I/O exception

cache

protected void cache()
              throws java.io.IOException

Description copied from class: Query

Caches the query result.

Specified by:

cache in class Query

Throws:

java.io.IOException - I/O exception

execute

public java.lang.String execute()
                         throws java.io.IOException

Description copied from class: Query

Returns the complete result of the query.

Specified by:

execute in class Query

Returns:

item string or null.

Throws:

java.io.IOException - I/O exception

info

public java.lang.String info()
                      throws java.io.IOException

Description copied from class: Query

Returns query info.

Specified by:

info in class Query

Returns:

query info

Throws:

java.io.IOException - I/O exception

options

public java.lang.String options()
                         throws java.io.IOException

Description copied from class: Query

Returns the serialization options.

Specified by:

options in class Query

Returns:

serialization options.

Throws:

java.io.IOException - I/O exception

updating

public boolean updating()
                 throws java.io.IOException

Description copied from class: Query

Returns true if the query may perform updates.

Specified by:

updating in class Query

Returns:

updating flag

Throws:

java.io.IOException - I/O exception

close

public void close()

Description copied from class: Query

Closes the query.

Specified by:

close in class Query