IKeyExtractor (Jadex Active Component Platform 4.0.261 API)

All Known Implementing Classes:

QueryInfoExtractor, ServiceKeyExtractor
```
public interface IKeyExtractor<T>
```
Interface denoting key extraction functionality for indexers.

Field Summary

Fields
Modifier and Type Field Description

static java.lang.String MATCH_ALWAYS
Match any value constant for values.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`java.lang.Boolean`	`getKeyMatchingMode(java.lang.String keytype, T value)`	Extracts the matching mode from a multivalued term.
`java.lang.String[]`	`getKeyNames()`	Get the key names for this type of extractor.
`java.util.Set<java.lang.String>`	`getKeyValues(java.lang.String keytype, T value)`	Extracts key value from an object.

- Field Detail
  - MATCH_ALWAYS
```
static final java.lang.String MATCH_ALWAYS
```
    Match any value constant for values. Indexer checks if value is ANY and then it always matches.
    
    See Also:
    
    Constant Field Values
- Method Detail
  - getKeyValues
```
java.util.Set<java.lang.String> getKeyValues(java.lang.String keytype,
                                             T value)
```
    Extracts key value from an object.
    
    Parameters:
    
    keytype - The type of key being extracted.
    
    value - The value.
    
    Returns:
    
    The keys matching the type.
  - getKeyMatchingMode
```
java.lang.Boolean getKeyMatchingMode(java.lang.String keytype,
                                     T value)
```
    Extracts the matching mode from a multivalued term. true = AND, false = OR
    
    Parameters:
    
    keytype - The type of key being extracted.
    
    value - The value.
    
    Returns:
    
    The key matching mode.
  - getKeyNames
```
java.lang.String[] getKeyNames()
```
    Get the key names for this type of extractor.
    
    Returns:
    
    The key names.