org.apache.lucene.analysis

## Class LegacyNumericTokenStream

- java.lang.Object
- - org.apache.lucene.util.AttributeSource
  - - org.apache.lucene.analysis.TokenStream
    - - org.apache.lucene.analysis.LegacyNumericTokenStream

- All Implemented Interfaces:
    Closeable, AutoCloseable

  Deprecated.
  Please switch to `PointValues` instead

      @Deprecated
      public final class LegacyNumericTokenStream
      extends TokenStream

  Expert: This class provides a `TokenStream` for indexing numeric values that can be used by `LegacyNumericRangeQuery`.

  Note that for simple usage, `LegacyIntField`, `LegacyLongField`, `LegacyFloatField` or `LegacyDoubleField` is recommended. These fields disable norms and term freqs, as they are not usually needed during searching. If you need to change these settings, you should use this class.

  Here's an example usage, for an `int` field:

        FieldType fieldType = new FieldType(TextField.TYPE_NOT_STORED);
        fieldType.setOmitNorms(true);
        fieldType.setIndexOptions(IndexOptions.DOCS_ONLY);
        Field field = new Field(name, new LegacyNumericTokenStream(precisionStep).setIntValue(value), fieldType);
        document.add(field);

  For optimal performance, re-use the TokenStream and Field instance for more than one document:

        LegacyNumericTokenStream stream = new LegacyNumericTokenStream(precisionStep);
        FieldType fieldType = new FieldType(TextField.TYPE_NOT_STORED);
        fieldType.setOmitNorms(true);
        fieldType.setIndexOptions(IndexOptions.DOCS_ONLY);
        Field field = new Field(name, stream, fieldType);
        Document document = new Document();
        document.add(field);

        for(all documents) {
          stream.setIntValue(value)
          writer.addDocument(document);
        }

  This stream is not intended to be used in analyzers; it's more for iterating the different precisions during indexing a specific numeric value.

  NOTE: as token streams are only consumed once the document is added to the index, if you index more than one numeric field, use a separate `LegacyNumericTokenStream` instance for each.

  See `LegacyNumericRangeQuery` for more details on the `precisionStep` parameter as well as how numeric fields work under the hood.

  Since:
    2.9

- - ### Nested Class Summary

    Nested Classes
    Modifier and Type | Class and Description
    --- | ---
    `static interface` | `LegacyNumericTokenStream.LegacyNumericTermAttribute` Deprecated. Expert: Use this attribute to get the details of the currently generated token.
    `static class` | `LegacyNumericTokenStream.LegacyNumericTermAttributeImpl` Deprecated. Implementation of `LegacyNumericTokenStream.LegacyNumericTermAttribute`.

    - ### Nested classes/interfaces inherited from class org.apache.lucene.util.AttributeSource

      `AttributeSource.State`

  - ### Field Summary

    Fields
    Modifier and Type | Field and Description
    --- | ---
    `static String` | `TOKEN_TYPE_FULL_PREC` Deprecated. The full precision token gets this token type assigned.
    `static String` | `TOKEN_TYPE_LOWER_PREC` Deprecated. The lower precision tokens gets this token type assigned.

    - ### Fields inherited from class org.apache.lucene.analysis.TokenStream

      `DEFAULT_TOKEN_ATTRIBUTE_FACTORY`

  - ### Constructor Summary

    Constructors
    Constructor and Description
    `LegacyNumericTokenStream()` Deprecated. Creates a token stream for numeric values using the default `precisionStep` `LegacyNumericUtils.PRECISION_STEP_DEFAULT` (16).
    `LegacyNumericTokenStream(AttributeFactory factory, int precisionStep)` Deprecated. Expert: Creates a token stream for numeric values with the specified `precisionStep` using the given `AttributeFactory`.
    `LegacyNumericTokenStream(int precisionStep)` Deprecated. Creates a token stream for numeric values with the specified `precisionStep`.

  - ### Method Summary

    All Methods Instance Methods Concrete Methods Deprecated Methods
    Modifier and Type | Method and Description
    --- | ---
    `int` | `getPrecisionStep()` Deprecated. Returns the precision step.
    `boolean` | `incrementToken()` Deprecated. Consumers (i.e., `IndexWriter`) use this method to advance the stream to the next token.
    `void` | `reset()` Deprecated. This method is called by a consumer before it begins consumption using `TokenStream.incrementToken()`.
    `LegacyNumericTokenStream` | `setDoubleValue(double value)` Deprecated. Initializes the token stream with the supplied `double` value.
    `LegacyNumericTokenStream` | `setFloatValue(float value)` Deprecated. Initializes the token stream with the supplied `float` value.
    `LegacyNumericTokenStream` | `setIntValue(int value)` Deprecated. Initializes the token stream with the supplied `int` value.
    `LegacyNumericTokenStream` | `setLongValue(long value)` Deprecated. Initializes the token stream with the supplied `long` value.
    `String` | `toString()` Deprecated. Returns a string consisting of the class's simple name, the hex representation of the identity hash code, and the current reflection of all attributes.

    - ### Methods inherited from class org.apache.lucene.analysis.TokenStream

      `close, end`

    - ### Methods inherited from class org.apache.lucene.util.AttributeSource

      `addAttribute, addAttributeImpl, captureState, clearAttributes, cloneAttributes, copyTo, endAttributes, equals, getAttribute, getAttributeClassesIterator, getAttributeFactory, getAttributeImplsIterator, hasAttribute, hasAttributes, hashCode, reflectAsString, reflectWith, removeAllAttributes, restoreState`

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

      `clone, finalize, getClass, notify, notifyAll, wait, wait, wait`

- - ### Field Detail

    - #### TOKEN_TYPE_FULL_PREC

          public static final String TOKEN_TYPE_FULL_PREC

      Deprecated.
      The full precision token gets this token type assigned.
      See Also:
        Constant Field Values

    - #### TOKEN_TYPE_LOWER_PREC

          public static final String TOKEN_TYPE_LOWER_PREC

      Deprecated.
      The lower precision tokens gets this token type assigned.
      See Also:
        Constant Field Values

  - ### Constructor Detail

    - #### LegacyNumericTokenStream

          public LegacyNumericTokenStream()

      Deprecated.
      Creates a token stream for numeric values using the default `precisionStep` `LegacyNumericUtils.PRECISION_STEP_DEFAULT` (16). The stream is not yet initialized, before using set a value using the various set???Value() methods.

    - #### LegacyNumericTokenStream

          public LegacyNumericTokenStream(int precisionStep)

      Deprecated.
      Creates a token stream for numeric values with the specified `precisionStep`. The stream is not yet initialized, before using set a value using the various set???Value() methods.

    - #### LegacyNumericTokenStream

          public LegacyNumericTokenStream(AttributeFactory factory,
                                          int precisionStep)

      Deprecated.
      Expert: Creates a token stream for numeric values with the specified `precisionStep` using the given `AttributeFactory`. The stream is not yet initialized, before using set a value using the various set???Value() methods.

  - ### Method Detail

    - #### setLongValue

          public LegacyNumericTokenStream setLongValue(long value)

      Deprecated.
      Initializes the token stream with the supplied `long` value.
      Parameters:
        `value` - the value, for which this TokenStream should enumerate tokens.
      Returns:
        this instance, because of this you can use it the following way: `new Field(name, new LegacyNumericTokenStream(precisionStep).setLongValue(value))`

    - #### setIntValue

          public LegacyNumericTokenStream setIntValue(int value)

      Deprecated.
      Initializes the token stream with the supplied `int` value.
      Parameters:
        `value` - the value, for which this TokenStream should enumerate tokens.
      Returns:
        this instance, because of this you can use it the following way: `new Field(name, new LegacyNumericTokenStream(precisionStep).setIntValue(value))`

    - #### setDoubleValue

          public LegacyNumericTokenStream setDoubleValue(double value)

      Deprecated.
      Initializes the token stream with the supplied `double` value.
      Parameters:
        `value` - the value, for which this TokenStream should enumerate tokens.
      Returns:
        this instance, because of this you can use it the following way: `new Field(name, new LegacyNumericTokenStream(precisionStep).setDoubleValue(value))`

    - #### setFloatValue

          public LegacyNumericTokenStream setFloatValue(float value)

      Deprecated.
      Initializes the token stream with the supplied `float` value.
      Parameters:
        `value` - the value, for which this TokenStream should enumerate tokens.
      Returns:
        this instance, because of this you can use it the following way: `new Field(name, new LegacyNumericTokenStream(precisionStep).setFloatValue(value))`

    - #### reset

          public void reset()

      Deprecated.
      Description copied from class: `TokenStream`
      This method is called by a consumer before it begins consumption using `TokenStream.incrementToken()`.

      Resets this stream to a clean state. Stateful implementations must implement this method so that they can be reused, just as if they had been created fresh.

      If you override this method, always call `super.reset()`, otherwise some internal state will not be correctly reset (e.g., `Tokenizer` will throw `IllegalStateException` on further usage).

      Overrides:
        `reset` in class `TokenStream`

    - #### incrementToken

          public boolean incrementToken()

      Deprecated.
      Description copied from class: `TokenStream`
      Consumers (i.e., `IndexWriter`) use this method to advance the stream to the next token. Implementing classes must implement this method and update the appropriate `AttributeImpl`s with the attributes of the next token.

      The producer must make no assumptions about the attributes after the method has been returned: the caller may arbitrarily change it. If the producer needs to preserve the state for subsequent calls, it can use `AttributeSource.captureState()` to create a copy of the current attribute state.

      This method is called for every token of a document, so an efficient implementation is crucial for good performance. To avoid calls to `AttributeSource.addAttribute(Class)` and `AttributeSource.getAttribute(Class)`, references to all `AttributeImpl`s that this stream uses should be retrieved during instantiation.

      To ensure that filters and consumers know which attributes are available, the attributes must be added during instantiation. Filters and consumers are not required to check for availability of attributes in `TokenStream.incrementToken()`.

      Specified by:
        `incrementToken` in class `TokenStream`
      Returns:
        false for end of stream; true otherwise

    - #### getPrecisionStep

          public int getPrecisionStep()

      Deprecated.
      Returns the precision step.

    - #### toString

          public String toString()

      Deprecated.
      Description copied from class: `AttributeSource`
      Returns a string consisting of the class's simple name, the hex representation of the identity hash code, and the current reflection of all attributes.
      Overrides:
        `toString` in class `AttributeSource`
      See Also:
        `AttributeSource.reflectAsString(boolean)`

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