Package org.apache.jackrabbit.spi.commons.query.xpath

Class QueryBuilder

java.lang.Object

org.apache.jackrabbit.spi.commons.query.xpath.QueryBuilder

All Implemented Interfaces:

QueryTreeBuilder

public class QueryBuilder
extends Object
implements QueryTreeBuilder

Implements the XPath query tree builder.

Constructor Summary

Constructors

Constructor	Description
QueryBuilder()

Method Summary

Modifier and Type	Method	Description
boolean	canHandle(String language)	Returns true if this query tree builder can handle a statement in language.
QueryRootNode	createQueryTree(String statement, NameResolver resolver, QueryNodeFactory factory)	Creates a QueryNode tree from a statement using the passed query node factory.
String[]	getSupportedLanguages()	This builder supports Query.XPATH.
String	toString(QueryRootNode root, NameResolver resolver)	Creates a String representation of the query node tree in the syntax this QueryTreeBuilder can handle.

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryBuilder

public QueryBuilder()

Method Detail

createQueryTree

public QueryRootNode createQueryTree(String statement,
                                     NameResolver resolver,
                                     QueryNodeFactory factory)
                              throws InvalidQueryException

Creates a QueryNode tree from a statement using the passed query node factory.

Specified by:

createQueryTree in interface QueryTreeBuilder

Parameters:

statement - the statement.

resolver - the name resolver to use.

factory - the query node factory to use.

Returns:

the QueryNode tree for the statement.

Throws:

InvalidQueryException - if the statement is malformed.

canHandle

public boolean canHandle(String language)

Returns true if this query tree builder can handle a statement in language.

Specified by:

canHandle in interface QueryTreeBuilder

Parameters:

language - the language of a query statement to build a query tree.

Returns:

true if this builder can handle language; false otherwise.

getSupportedLanguages

public String[] getSupportedLanguages()

This builder supports Query.XPATH. Returns the set of query languages supported by this builder.

Specified by:

getSupportedLanguages in interface QueryTreeBuilder

Returns:

String array containing the names of the supported languages.

toString

public String toString(QueryRootNode root,
                       NameResolver resolver)
                throws InvalidQueryException

Creates a String representation of the query node tree in the syntax this QueryTreeBuilder can handle.

Specified by:

toString in interface QueryTreeBuilder

Parameters:

root - the root of the query node tree.

resolver - to resolve Names.

Returns:

a String representation of the query node tree.

Throws:

InvalidQueryException - if the query node tree cannot be converted into a String representation due to restrictions in this syntax.