Alphabet Leave feedback
An instance of the Alphabet class contains types of characters used for indexing. For detailed information on the types of characters, see the Character types page.
The getCharacterType method is used to get the type of a specific character.
The getCount method returns the number of characters of a type other than CharacterType.Separator.
To set the type of characters in the alphabet, use the setRange method.
To set the CharacterType.Separator type for all characters in the alphabet, use the clear method.
To export types of all characters to a file, use the exportDictionary method.
To import types of all characters from a file, use the importDictionary method.
The following example demonstrates the use of methods of the alphabet.
const indexFolder = 'c:/MyIndex/';
const documentsFolder = 'c:/MyDocuments/';
// Creating or opening an index from the specified folder
const index = new groupdocs.search.Index(indexFolder);
// Export the alphabet to a file
const fileName = Utils.OutputPath + 'AdvancedUsage/ManagingDictionaries/alphabet/Alphabet.dat';
index.getDictionaries().getAlphabet().exportDictionary(fileName);
if (index.getDictionaries().getAlphabet().getCount() > 0) {
// Setting a type of all characters to Separator
index.getDictionaries().getAlphabet().clear();
}
// Import the alphabet from a file
index.getDictionaries().getAlphabet().importDictionary(fileName);
if (
String(index.getDictionaries().getAlphabet().getCharacterType(java.newChar('-'))) !=
String(groupdocs.search.CharacterType.Blended)
) {
// Setting a type of hyphen character to Blended
index
.getDictionaries()
.getAlphabet()
.setRange(java.newArray('char', ['-']), groupdocs.search.CharacterType.Blended);
}
// Indexing documents from the specified folder
index.add(documentsFolder);
// Search in the index
const query = 'Elliot-Murray-Kynynmound';
const result = index.search(query);
You may easily run the code from documentation articles and see the features in action in our GitHub examples:
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