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Leading and Trailing Wild Card Implementation Details
Equivalent to '*term*' This should be a very poor performing search and is not recommended especially when entering a phrase.
Algorithm:
The Leading and Trailing Wild Card search has the following characteristics:
- This search is case in-sensitive.
- It only searches on the property value and literal property value.
- A leading and trailing wild card is added to the token in the search text.
- The literal property part (without the wild cards) of the query is boosted by 50. This gives a literal match priority.
- Parsing is done with Lucene's StandardAnalyzer.
Example of use:
The following examples are based on the Automobiles coding scheme.
Example 1:
Search string: hevy
Lucene query: +propertyValue:*hevy* literal_propertyValue:hevy^50.0
Complete query:
- +*:* +(entityType:concept)
- +*:* +isAnonymous:F
- +*:* +(+propertyValue:*hevy* literal_propertyValue:hevy^50.0) +(propertyType:presentation)
Result: 1 result
- entity code: Chevy
- entity description: Chevrolet
Example 2:
Search string:
Lucene query:
Complete query:
Result: 1 result
- entity code:
- entity description:
Associated JUnits:
Junits can be found here: https://github.com/lexevs/lexevs/blob/master/lbTest/src/test/java/org/LexGrid/LexBIG/Impl/function/query/lucene/searchAlgorithms/TestLeadingAndTrailingWildcard.java
