org.mmbase.storage.search.implementation.database
Class HSqlSqlHandler

java.lang.Object
  org.mmbase.storage.search.implementation.database.BasicSqlHandler
      org.mmbase.storage.search.implementation.database.HSqlSqlHandler

All Implemented Interfaces:

SqlHandler

public class HSqlSqlHandler
extends BasicSqlHandler
implements SqlHandler

The HSQL query handler, implements SqlHandler for standard hsql functionality.

Since:

MMBase-1.7

Version:

$Id: HSqlSqlHandler.java 34900 2009-05-01 16:29:42Z michiel $

Author:

Michiel Meeuwissen

Constructor Summary

HSqlSqlHandler()
Constructor.

Method Summary

protected void	appendDateField(StringBuilder sb, Step step, String fieldName, boolean multipleSteps, int datePart)
int	getSupportLevel(int feature, SearchQuery query) Gets the level at which a feature is supported for a query by this handler.
String	toSql(SearchQuery query, SqlHandler firstInChain) Represents a SearchQuery object as a string in SQL format, using the database configuration.

Methods inherited from class org.mmbase.storage.search.implementation.database.BasicSqlHandler

appendCompositeConstraintToSql, appendConstraintToSql, appendDateValue, appendField, appendField, appendField, appendFieldValue, appendLikeOperator, appendLowerField, appendPreField, appendQueryBodyToSql, appendRegularExpressionOperator, appendRelationConstraints, appendSortOrderDirection, appendSortOrderField, appendSortOrderField, appendSortOrders, appendTableAlias, appendTableName, forceEncode, getAllowedValue, getSupportLevel, toSqlString, useLower

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.mmbase.storage.search.implementation.database.SqlHandler

appendConstraintToSql, appendQueryBodyToSql, getAllowedValue, getSupportLevel

Constructor Detail

HSqlSqlHandler

public HSqlSqlHandler()

Constructor.

Method Detail

getSupportLevel

public int getSupportLevel(int feature,
                           SearchQuery query)
                    throws SearchQueryException

Description copied from interface: SqlHandler

Gets the level at which a feature is supported for a query by this handler. This is one of either:

• SUPPORT_NONE
• SUPPORT_WEAK
• SUPPORT_NORMAL
• SUPPORT_OPTIMAL

Given the choice, the query handler with the highest level of support is prefered.

Specified by:

getSupportLevel in interface SqlHandler

Overrides:

getSupportLevel in class BasicSqlHandler

Throws:

SearchQueryException

appendDateField

protected void appendDateField(StringBuilder sb,
                               Step step,
                               String fieldName,
                               boolean multipleSteps,
                               int datePart)

Overrides:

appendDateField in class BasicSqlHandler

Javadoc:

toSql

public String toSql(SearchQuery query,
                    SqlHandler firstInChain)
             throws SearchQueryException

Description copied from interface: SqlHandler

Represents a SearchQuery object as a string in SQL format, using the database configuration.

Specified by:

toSql in interface SqlHandler

Overrides:

toSql in class BasicSqlHandler

Parameters:

query - The searchquery.

firstInChain - The first element in the chain of handlers. At some point appendQueryBodyToSql() will have to be called on this handler, to generate the body of the query.

Returns:

SQL string representation of the query.

Throws:

SearchQueryException