Package org.eclipse.lyo.core.query

Class QueryUtils

java.lang.Object

org.eclipse.lyo.core.query.QueryUtils

public class QueryUtils
extends Object

Utility methods for parsing various OSLC HTTP query parameter clauses; e.g. oslc.where

Field Summary

Fields

Modifier and Type	Field	Description
static Properties	WILDCARD_PROPERTY_LIST	A property list that selects all properties

Constructor Summary

Constructors

Constructor	Description
QueryUtils()

Method Summary

Modifier and Type	Method	Description
static Map<String,Object>	invertSelectedProperties(Properties properties)	Create a map representation of the Properties returned from parsing oslc.properties or oslc.select URL query parameters suitable for generating a property result from an HTTP GET request.
static OrderByClause	parseOrderBy(String orderByExpression, Map<String,String> prefixMap)	Parse a oslc.orderBy expression
static Map<String,String>	parsePrefixes(String prefixExpression)	Parse a oslc.prefix clause into a map between prefixes and corresponding URIs
static PropertiesClause	parseProperties(String propertiesExpression, Map<String,String> prefixMap)	Parse a oslc.properties expression
static SearchTermsClause	parseSearchTerms(String searchTermsExpression)	Parse an oslc.searchTerms expression
static SelectClause	parseSelect(String selectExpression, Map<String,String> prefixMap)	Parse a oslc.select expression
static WhereClause	parseWhere(String whereExpression, Map<String,String> prefixMap)	Parse a oslc.where expression

Methods inherited from class java.lang.Object

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

Field Detail

WILDCARD_PROPERTY_LIST

public static final Properties WILDCARD_PROPERTY_LIST

A property list that selects all properties

Constructor Detail

QueryUtils

public QueryUtils()

Method Detail

parsePrefixes

public static Map<String,String> parsePrefixes(String prefixExpression)
                                              throws ParseException

Parse a oslc.prefix clause into a map between prefixes and corresponding URIs

Note: Object.toString() of result has been overridden to return input expression.

Parameters:

prefixExpression - the oslc.prefix expression

Returns:

the prefix map

Throws:

ParseException

parseWhere

public static WhereClause parseWhere(String whereExpression,
                                     Map<String,String> prefixMap)
                              throws ParseException

Parse a oslc.where expression

Parameters:

whereExpression - contents of an oslc.where HTTP query parameter

prefixMap - map between XML namespace prefixes and associated URLs

Returns:

the parsed where clause

Throws:

ParseException

parseSelect

public static SelectClause parseSelect(String selectExpression,
                                       Map<String,String> prefixMap)
                                throws ParseException

Parse a oslc.select expression

Parameters:

selectExpression - contents of an oslc.select HTTP query parameter

prefixMap - map between XML namespace prefixes and associated URLs

Returns:

the parsed select clause

Throws:

ParseException

parseProperties

public static PropertiesClause parseProperties(String propertiesExpression,
                                               Map<String,String> prefixMap)
                                        throws ParseException

Parse a oslc.properties expression

Parameters:

propertiesExpression - contents of an oslc.properties HTTP query parameter

prefixMap - map between XML namespace prefixes and associated URLs

Returns:

the parsed properties clause

Throws:

ParseException

parseOrderBy

public static OrderByClause parseOrderBy(String orderByExpression,
                                         Map<String,String> prefixMap)
                                  throws ParseException

Parse a oslc.orderBy expression

Parameters:

orderByExpression - contents of an oslc.orderBy HTTP query parameter

prefixMap - map between XML namespace prefixes and associated URLs

Returns:

the parsed order by clause

Throws:

ParseException

invertSelectedProperties

public static Map<String,Object> invertSelectedProperties(Properties properties)

Create a map representation of the Properties returned from parsing oslc.properties or oslc.select URL query parameters suitable for generating a property result from an HTTP GET request.

The map keys are the property names; i.e. the local name of the property concatenated to the XML namespace of the property. The values of the map are:

• Wildcard, if all properties at this level are to be output. No recursion below this level is to be done.
• OSLC4JConstants.OSL4J_PROPERTY_SINGLETON - if only the named property is to be output, without recursion
• a nested property list to recurse through

Parameters:

properties -

Returns:

the property map

parseSearchTerms

public static SearchTermsClause parseSearchTerms(String searchTermsExpression)
                                          throws ParseException

Parse an oslc.searchTerms expression

Note: Object.toString() of result has been overridden to return input expression.

Parameters:

searchTermsExpression - contents of an oslc.searchTerms HTTP query parameter

Returns:

the parsed search terms clause

Throws:

ParseException