org.modeshape.graph.query.parse
Class QueryParsers

java.lang.Object
  org.modeshape.graph.query.parse.QueryParsers

@ThreadSafe
public class QueryParsers
extends Object

A thread-safe collection of QueryParser implementations that can be used to parse queries by language.

Constructor Summary

QueryParsers(Iterable<QueryParser> parsers)
Create a new collection of the supplied QueryParser objects.

QueryParsers(QueryParser... parsers)
Create a new collection of the supplied QueryParser objects.

Method Summary

void	addLanguage(QueryParser languageParser) Add a language to this engine by supplying its parser.
void	addLanguages(Iterable<QueryParser> languages) Add one or more languages to this engine by supplying the corresponding parsers.
void	addLanguages(QueryParser firstLanguage, QueryParser... additionalLanguages) Add one or more languages to this engine by supplying the corresponding parsers.
boolean	equals(Object obj)
Set<String>	getLanguages() Get the set of languages that this engine is capable of parsing.
QueryParser	getParserFor(String language) Get the parser for the supplied language.
int	hashCode()
QueryCommand	parse(TypeSystem typeSystem, String language, String query) Execute the supplied query by planning, optimizing, and then processing it.
QueryParser	removeLanguage(String language) Remove from this engine the language with the given name.
Collection<QueryParser>	removeLanguages(String firstLanguage, String... additionalLanguages) Remove from this engine the language with the given name.
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

QueryParsers

public QueryParsers(QueryParser... parsers)

Create a new collection of the supplied QueryParser objects.

Parameters:

parsers - the parsers

QueryParsers

public QueryParsers(Iterable<QueryParser> parsers)

Create a new collection of the supplied QueryParser objects.

Parameters:

parsers - the parsers

Method Detail

addLanguage

public void addLanguage(QueryParser languageParser)

Add a language to this engine by supplying its parser.

Parameters:

languageParser - the query parser for the language

Throws:

IllegalArgumentException - if the language parser is null

addLanguages

public void addLanguages(QueryParser firstLanguage,
                         QueryParser... additionalLanguages)

Add one or more languages to this engine by supplying the corresponding parsers.

Parameters:

firstLanguage - the query parser for the first language

additionalLanguages - the query parsers for the additional languages

Throws:

IllegalArgumentException - if the language parser is null

addLanguages

public void addLanguages(Iterable<QueryParser> languages)

Add one or more languages to this engine by supplying the corresponding parsers.

Parameters:

languages - the query parsers for the languages that are to be added

Throws:

IllegalArgumentException - if the iterable reference is null

removeLanguage

public QueryParser removeLanguage(String language)

Remove from this engine the language with the given name.

Parameters:

language - the name of the language, which is to match the language of the parser

Returns:

the parser for the language, or null if the engine had no support for the named language

Throws:

IllegalArgumentException - if the language is null

removeLanguages

public Collection<QueryParser> removeLanguages(String firstLanguage,
                                               String... additionalLanguages)

Remove from this engine the language with the given name.

Parameters:

firstLanguage - the name of the first language to remove, which must match the language of the parser

additionalLanguages - the names of the additional languages to remove, which must match the language of the parser

Returns:

the parser for the language, or null if the engine had no support for the named language

Throws:

IllegalArgumentException - if the language is null

getLanguages

public Set<String> getLanguages()

Get the set of languages that this engine is capable of parsing.

Returns:

the unmodifiable copy of the set of languages; never null but possibly empty

getParserFor

public QueryParser getParserFor(String language)

Get the parser for the supplied language.

Parameters:

language - the language in which the query is expressed; must case-insensitively match one of the supported languages

Returns:

the query parser, or null if the supplied language is not supported

Throws:

IllegalArgumentException - if the language is null

parse

public QueryCommand parse(TypeSystem typeSystem,
                          String language,
                          String query)

Execute the supplied query by planning, optimizing, and then processing it.

Parameters:

typeSystem - the type system that should be used

language - the language in which the query is expressed; must case-insensitively match one of the supported languages

query - the query that is to be executed

Returns:

the parsed query command; never null

Throws:

IllegalArgumentException - if the language, context or query references are null, or if the language is not known

ParsingException - if there is an error parsing the supplied query

InvalidQueryException - if the supplied query can be parsed but is invalid

hashCode

public int hashCode()

Overrides:

hashCode in class Object

See Also:

Object.hashCode()

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

See Also:

Object.equals(java.lang.Object)

toString

public String toString()

Overrides:

toString in class Object

See Also:

Object.toString()