org.eaglei.search.provider
Class SearchResultRankMerger

java.lang.Object
  org.eaglei.search.provider.SearchResultRankMerger

All Implemented Interfaces:

org.eaglei.search.provider.SearchProvider

public class SearchResultRankMerger
extends java.lang.Object
implements org.eaglei.search.provider.SearchProvider

Trivial implementation of SearchResultMerger that uses result rank. Also trims the results sets to the specified range. NOTE: the rank across result sets is not in most cases comparable.

Author:

rfrost

Field Summary

static java.lang.String	DEFAULT_TRIM_TO_RANGE_PROP Default value of the trim to range property.
static float	POSITION_DECREMENT Amount that the result rank is decremented for each position in the order.
static java.lang.String	TRIM_TO_RANGE_PROP System property that controls whether the merger trims results to the paginated range.

Constructor Summary

SearchResultRankMerger(org.eaglei.search.provider.MultiNodeSearchProvider nestedProvider)

Method Summary

org.eaglei.search.provider.SearchCounts	count(org.eaglei.search.provider.SearchCountRequest request)
boolean	getTrimToRange()
void	init()
org.eaglei.search.provider.SearchResultSet	query(org.eaglei.search.provider.SearchRequest request)
void	setTrimToRange(boolean trimToRange) Sets the flag that controls whether the returned SearchResultSet is trimmed to the range specified in the SearchRequest or whether all merged results are returned.

Methods inherited from class java.lang.Object

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

Field Detail

TRIM_TO_RANGE_PROP

public static final java.lang.String TRIM_TO_RANGE_PROP

System property that controls whether the merger trims results to the paginated range.

See Also:

Constant Field Values

DEFAULT_TRIM_TO_RANGE_PROP

public static final java.lang.String DEFAULT_TRIM_TO_RANGE_PROP

Default value of the trim to range property.

See Also:

Constant Field Values

POSITION_DECREMENT

public static final float POSITION_DECREMENT

Amount that the result rank is decremented for each position in the order.

See Also:

Constant Field Values

Constructor Detail

SearchResultRankMerger

public SearchResultRankMerger(org.eaglei.search.provider.MultiNodeSearchProvider nestedProvider)

Method Detail

setTrimToRange

public void setTrimToRange(boolean trimToRange)

Sets the flag that controls whether the returned SearchResultSet is trimmed to the range specified in the SearchRequest or whether all merged results are returned. In both cases, the SearchRequest range is used when calling the nested SearchProvider.

Parameters:

trimToRange - True to trim merged results.

getTrimToRange

public boolean getTrimToRange()

See Also:

setTrimToRange(boolean)

init

public void init()
          throws java.io.IOException

Specified by:

init in interface org.eaglei.search.provider.SearchProvider

Throws:

java.io.IOException

count

public org.eaglei.search.provider.SearchCounts count(org.eaglei.search.provider.SearchCountRequest request)
                                              throws java.io.IOException

Specified by:

count in interface org.eaglei.search.provider.SearchProvider

Throws:

java.io.IOException

query

public org.eaglei.search.provider.SearchResultSet query(org.eaglei.search.provider.SearchRequest request)
                                                 throws java.io.IOException

Specified by:

query in interface org.eaglei.search.provider.SearchProvider

Throws:

java.io.IOException