Package com.yahoo.prelude.query

Class QueryCanonicalizer

java.lang.Object

com.yahoo.prelude.query.QueryCanonicalizer

public class QueryCanonicalizer
extends Object

Query normalizer and sanity checker.

Author:

bratseth

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueryCanonicalizer.CanonicalizationResult

Field Summary

Fields

Modifier and Type	Field	Description
static String	queryCanonicalization	The name of the operation performed by this, for use in search chain ordering

Constructor Summary

Constructors

Constructor	Description
QueryCanonicalizer()

Method Summary

Modifier and Type	Method	Description
static String	canonicalize(Query query)	Validates this query and carries out possible operations on this query which simplifies it without changing its semantics.
static String	canonicalize(QueryTree query)	Canonicalizes this query

Methods inherited from class java.lang.Object

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

Field Detail

queryCanonicalization

public static final String queryCanonicalization

The name of the operation performed by this, for use in search chain ordering

See Also:

Constant Field Values

Constructor Detail

QueryCanonicalizer

public QueryCanonicalizer()

Method Detail

canonicalize

public static String canonicalize(Query query)

Validates this query and carries out possible operations on this query which simplifies it without changing its semantics.

Returns:

null if the query is valid, an error message if it is invalid

canonicalize

public static String canonicalize(QueryTree query)

Canonicalizes this query

Returns:

null if the query is valid, an error message if it is invalid