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## org.apache.lucene.queryparser.flexible.core.config
Class QueryConfigHandler

    java.lang.Object
      org.apache.lucene.queryparser.flexible.core.config.AbstractQueryConfig
          org.apache.lucene.queryparser.flexible.core.config.QueryConfigHandler

Direct Known Subclasses:
  StandardQueryConfigHandler

    public abstract class QueryConfigHandler

extends AbstractQueryConfig

This class can be used to hold any query configuration and no field configuration. For field configuration, it creates an empty `FieldConfig` object and delegate it to field config listeners, these are responsible for setting up all the field configuration. `QueryConfigHandler` should be extended by classes that intends to provide configuration to `QueryNodeProcessor` objects. The class that extends `QueryConfigHandler` should also provide `FieldConfig` objects for each collection field.

See Also:
  `FieldConfig`, `FieldConfigListener`, `QueryConfigHandler`

Constructor Summary
`QueryConfigHandler()`

Method Summary
`void` | `addFieldConfigListener(FieldConfigListener listener)` Adds a listener.
`FieldConfig` | `getFieldConfig(String fieldName)` Returns an implementation of `FieldConfig` for a specific field name.

Methods inherited from class org.apache.lucene.queryparser.flexible.core.config.AbstractQueryConfig
`get, has, set, unset`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### QueryConfigHandler

    public QueryConfigHandler()

Method Detail

### getFieldConfig

    public FieldConfig getFieldConfig(String fieldName)

  Returns an implementation of `FieldConfig` for a specific field name. If the implemented `QueryConfigHandler` does not know a specific field name, it may return `null`, indicating there is no configuration for that field.

  Parameters:
    `fieldName` - the field name
  Returns:
    a `FieldConfig` object containing the field name configuration or `null`, if the implemented `QueryConfigHandler` has no configuration for that field

### addFieldConfigListener

    public void addFieldConfigListener(FieldConfigListener listener)

  Adds a listener. The added listeners are called in the order they are added.

  Parameters:
    `listener` - the listener to be added

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