## org.apache.lucene.util.fst
Class NoOutputs

    java.lang.Object
      org.apache.lucene.util.fst.Outputs<Object>
          org.apache.lucene.util.fst.NoOutputs

    public final class NoOutputs

extends Outputs<Object>

A null FST `Outputs` implementation; use this if you just want to build an FSA.

WARNING: This API is experimental and might change in incompatible ways in the next release.

Method Summary
`Object` `add(Object prefix, Object output)` Eg add("foo", "bar") -> "foobar"
`Object` `common(Object output1, Object output2)` Eg common("foo", "foobar") -> "foo"
`Object` `getNoOutput()` NOTE: this output is compared with == so you must ensure that all methods return the single object if it's really no output
`static NoOutputs` `getSingleton()`
`Object` `merge(Object first, Object second)`
`String` `outputToString(Object output)`
`Object` `read(DataInput in)` Decode an output value previously written with `Outputs.write(Object, DataOutput)`.
`Object` `subtract(Object output, Object inc)` Eg subtract("foobar", "foo") -> "bar"
`void` `write(Object prefix, DataOutput out)` Encode an output value into a `DataOutput`.

Methods inherited from class org.apache.lucene.util.fst.Outputs
`readFinalOutput, writeFinalOutput`

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

Method Detail

### getSingleton

    public static NoOutputs getSingleton()

### common

    public Object common(Object output1,
                         Object output2)

  Description copied from class: `Outputs`
  Eg common("foo", "foobar") -> "foo"

  Specified by:
    `common` in class `Outputs<Object>`

### subtract

    public Object subtract(Object output,
                           Object inc)

  Description copied from class: `Outputs`
  Eg subtract("foobar", "foo") -> "bar"

  Specified by:
    `subtract` in class `Outputs<Object>`

### add

    public Object add(Object prefix,
                      Object output)

  Description copied from class: `Outputs`
  Eg add("foo", "bar") -> "foobar"

  Specified by:
    `add` in class `Outputs<Object>`

### merge

    public Object merge(Object first,
                        Object second)

  Overrides:
    `merge` in class `Outputs<Object>`

### write

    public void write(Object prefix,
                      DataOutput out)

  Description copied from class: `Outputs`
  Encode an output value into a `DataOutput`.

  Specified by:
    `write` in class `Outputs<Object>`

### read

    public Object read(DataInput in)

  Description copied from class: `Outputs`
  Decode an output value previously written with `Outputs.write(Object, DataOutput)`.

  Specified by:
    `read` in class `Outputs<Object>`

### getNoOutput

    public Object getNoOutput()

  Description copied from class: `Outputs`
  NOTE: this output is compared with == so you must ensure that all methods return the single object if it's really no output

  Specified by:
    `getNoOutput` in class `Outputs<Object>`

### outputToString

    public String outputToString(Object output)

  Specified by:
    `outputToString` in class `Outputs<Object>`

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