Package org.alfresco.rest.framework.resource.parameters.where

Class QueryHelper

java.lang.Object

org.alfresco.rest.framework.resource.parameters.where.QueryHelper

public abstract class QueryHelper
extends Object

Provides helper methods for handling a WHERE query.

Author:

Gethin James

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueryHelper.QueryResolver<S extends QueryHelper.QueryResolver<?>>	Helper class allowing WHERE query resolving using query walker.
static interface	QueryHelper.WalkerCallback	An interface used when walking a query tree.
static class	QueryHelper.WalkerCallbackAdapter	Default implementation.

Constructor Summary

Constructors

Constructor	Description
QueryHelper()

Method Summary

Modifier and Type	Method	Description
protected static void	callbackTree(org.antlr.runtime.tree.Tree tree, QueryHelper.WalkerCallback callback, boolean negated)	Processes a tree type and calls the corresponding callback method.
static List<org.antlr.runtime.tree.Tree>	getChildren(org.antlr.runtime.tree.Tree tree)	Gets the children as a List
static QueryHelper.QueryResolver.WalkerSpecifier	resolve(Query query)
static String	stripQuotes(String toBeStripped)	Strips off any leading or trailing single quotes.
static void	walk(Query query, QueryHelper.WalkerCallback callback)	Walks a query with a callback for each operation

Methods inherited from class java.lang.Object

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

Constructor Details

QueryHelper

public QueryHelper()

Method Details

walk

public static void walk(Query query,
 QueryHelper.WalkerCallback callback)

Walks a query with a callback for each operation

Parameters:

query - the query

callback - a callback

callbackTree

protected static void callbackTree(org.antlr.runtime.tree.Tree tree,
 QueryHelper.WalkerCallback callback,
 boolean negated)

Processes a tree type and calls the corresponding callback method.

Parameters:

tree - Tree

callback - WalkerCallback

negated - boolean

getChildren

public static List<org.antlr.runtime.tree.Tree> getChildren(org.antlr.runtime.tree.Tree tree)

Gets the children as a List

Parameters:

tree - Tree

Returns:

either emptyList or the children.

stripQuotes

public static String stripQuotes(String toBeStripped)

Strips off any leading or trailing single quotes.

Parameters:

toBeStripped - String

Returns:

the String that has been stripped

resolve

public static QueryHelper.QueryResolver.WalkerSpecifier resolve(Query query)