org.apache.jackrabbit.core.query.xpath
Class QueryBuilder

java.lang.Object
  org.apache.jackrabbit.core.query.xpath.QueryBuilder

All Implemented Interfaces:

QueryTreeBuilder

public class QueryBuilder
extends Object
implements QueryTreeBuilder

Implements the XPath query tree builder.

Constructor Summary

QueryBuilder()

Method Summary

boolean	canHandle(String language) Returns true if this query tree builder can handle a statement in language.
QueryRootNode	createQueryTree(String statement, NamespaceResolver resolver) Creates a QueryNode tree from a statement.
String[]	getSupportedLanguages() This builder supports Query.XPATH.
String	toString(QueryRootNode root, NamespaceResolver 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,
                                     NamespaceResolver resolver)
                              throws InvalidQueryException

Description copied from interface: QueryTreeBuilder

Creates a QueryNode tree from a statement.

Specified by:

createQueryTree in interface QueryTreeBuilder

Parameters:

statement - the statement.

resolver - the namespace resolver to use.

Returns:

the QueryNode tree for the statement.

Throws:

InvalidQueryException - if the statement is malformed.

canHandle

public boolean canHandle(String language)

Description copied from interface: QueryTreeBuilder

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.

Specified by:

getSupportedLanguages in interface QueryTreeBuilder

Returns:

String array containing the names of the supported languages.

toString

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

Description copied from interface: QueryTreeBuilder

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 QNames.

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.