Package org.basex.core.cmd

Class Find

java.lang.Object

org.basex.core.jobs.Job

org.basex.core.Command

org.basex.core.cmd.AQuery

org.basex.core.cmd.Find

public final class Find
extends AQuery

Evaluates the 'find' command and processes a simplified request as XQuery.

Author:

BaseX Team 2005-21, BSD License, Christian Gruen

Field Summary

Fields inherited from class org.basex.core.cmd.AQuery

vars

Fields inherited from class org.basex.core.Command

args, context, exception, in, maxResults, openDB, options, out, soptions, uri

Fields inherited from class org.basex.core.jobs.Job

state, updating

Constructor Summary

Constructors

Constructor	Description
Find(String query)	Default constructor.
Find(String query, boolean rt)	Default constructor.

Method Summary

Modifier and Type	Method	Description
void	addLocks()	Adds the strings (databases, special identifiers) for which locks need to be acquired.
static String	find(String query, Context ctx, boolean root)	Creates an XQuery representation for the specified query.
static String	findTable(StringList filter, TokenList cols, BoolList elem, byte[] name, boolean root)	Creates an XQuery representation for the specified table query.
protected boolean	run()	Executes the command and serializes the result (internal call).
boolean	updating(Context ctx)	Checks if the command performs updates/write operations.

Methods inherited from class org.basex.core.cmd.AQuery

build, parameters, result, stoppable, updated

Methods inherited from class org.basex.core.Command

addLocks, baseURI, baseURI, close, error, exception, execute, execute, getOption, getOption, info, info, init, maxResults, newData, run, run, setInput, setInput, supportsProg, toString, toString

Methods inherited from class org.basex.core.jobs.Job

active, checkStop, detailedInfo, jc, memory, popJob, progressInfo, pushJob, register, shortInfo, state, stop, stopped, timeout, unregister

Methods inherited from class java.lang.Object

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

Constructor Details

Find

public Find(String query)

Default constructor.

Parameters:

query - simplified query

Find

public Find(String query,
 boolean rt)

Default constructor.

Parameters:

query - simplified query

rt - start from root node

Method Details

run

protected boolean run()

Description copied from class: Command

Executes the command and serializes the result (internal call).

Specified by:

run in class Command

Returns:

success of operation

updating

public boolean updating(Context ctx)

Description copied from class: Command

Checks if the command performs updates/write operations.

Overrides:

updating in class AQuery

Parameters:

ctx - database context

Returns:

result of check

addLocks

public void addLocks()

Description copied from class: Job

Adds the strings (databases, special identifiers) for which locks need to be acquired.

Overrides:

addLocks in class AQuery

find

public static String find(String query,
 Context ctx,
 boolean root)

Creates an XQuery representation for the specified query.

Parameters:

query - query

ctx - database context

root - start from root node

Returns:

query

findTable

public static String findTable(StringList filter,
 TokenList cols,
 BoolList elem,
 byte[] name,
 boolean root)

Creates an XQuery representation for the specified table query.

Parameters:

filter - filter terms

cols - filter columns

elem - element flag

name - name of root element

root - root flag

Returns:

query