Package org.apache.lucene.queryparser.flexible.core.config

# Class AbstractQueryConfig

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

Direct Known Subclasses:
  `FieldConfig`, `QueryConfigHandler`

public abstract class AbstractQueryConfig extends Object
This class is the base of `QueryConfigHandler` and `FieldConfig`. It has operations to set, unset and get configuration values.

Each configuration is a key->value pair. The key should be a unique `ConfigurationKey` instance, and it also holds the value's type.

See Also:
  - `ConfigurationKey`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `<T> T`
  `get(ConfigurationKey<T> key)`
  Returns the value held by the given key.
  `<T> boolean`
  `has(ConfigurationKey<T> key)`
  Returns true if there is a value set with the given key, otherwise false.
  `<T> void`
  `set(ConfigurationKey<T> key, T value)`
  Sets a key and its value.
  `<T> boolean`
  `unset(ConfigurationKey<T> key)`
  Unsets the given key and its value.

  ### Methods inherited from class java.lang.Object

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

- ## Method Details

  - ### get

    public <T> T get(ConfigurationKey<T> key)
    Returns the value held by the given key.
    Type Parameters:
      `T` - the value's type
    Parameters:
      `key` - the key, cannot be `null`
    Returns:
      the value held by the given key

  - ### has

    public <T> boolean has(ConfigurationKey<T> key)
    Returns true if there is a value set with the given key, otherwise false.
    Type Parameters:
      `T` - the value's type
    Parameters:
      `key` - the key, cannot be `null`
    Returns:
      true if there is a value set with the given key, otherwise false

  - ### set

    public <T> void set(ConfigurationKey<T> key, T value)
    Sets a key and its value.
    Type Parameters:
      `T` - the value's type
    Parameters:
      `key` - the key, cannot be `null`
      `value` - value to set

  - ### unset

    public <T> boolean unset(ConfigurationKey<T> key)
    Unsets the given key and its value.
    Type Parameters:
      `T` - the value's type
    Parameters:
      `key` - the key
    Returns:
      true if the key and value was set and removed, otherwise false