## org.apache.lucene.util.fst
Class PairOutputs<A,B>

    java.lang.Object
      org.apache.lucene.util.fst.Outputs<PairOutputs.Pair<A,B>>
          org.apache.lucene.util.fst.PairOutputs<A,B>

    public class PairOutputs<A,B>

extends Outputs<PairOutputs.Pair<A,B>>

An FST `Outputs` implementation, holding two other outputs.

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

Nested Class Summary
`static class` `PairOutputs.Pair<A,B>` Holds a single pair of two outputs.

Constructor Summary
`PairOutputs(Outputs<A> outputs1, Outputs<B> outputs2)`

Method Summary
`PairOutputs.Pair<A,B>` `add(PairOutputs.Pair<A,B> prefix, PairOutputs.Pair<A,B> output)` Eg add("foo", "bar") -> "foobar"
`PairOutputs.Pair<A,B>` `common(PairOutputs.Pair<A,B> pair1, PairOutputs.Pair<A,B> pair2)` Eg common("foo", "foobar") -> "foo"
`PairOutputs.Pair<A,B>` `getNoOutput()` NOTE: this output is compared with == so you must ensure that all methods return the single object if it's really no output
`PairOutputs.Pair<A,B>` `newPair(A a, B b)` Create a new Pair
`String` `outputToString(PairOutputs.Pair<A,B> output)`
`PairOutputs.Pair<A,B>` `read(DataInput in)` Decode an output value previously written with `Outputs.write(Object, DataOutput)`.
`PairOutputs.Pair<A,B>` `subtract(PairOutputs.Pair<A,B> output, PairOutputs.Pair<A,B> inc)` Eg subtract("foobar", "foo") -> "bar"
`String` `toString()`
`void` `write(PairOutputs.Pair<A,B> output, DataOutput writer)` Encode an output value into a `DataOutput`.

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

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

Constructor Detail

### PairOutputs

    public PairOutputs(Outputs<A> outputs1,
                       Outputs<B> outputs2)

Method Detail

### newPair

    public PairOutputs.Pair<A,B> newPair(A a,
                                         B b)

  Create a new Pair

### common

    public PairOutputs.Pair<A,B> common(PairOutputs.Pair<A,B> pair1,
                                        PairOutputs.Pair<A,B> pair2)

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

  Specified by:
    `common` in class `Outputs<PairOutputs.Pair<A,B>>`

### subtract

    public PairOutputs.Pair<A,B> subtract(PairOutputs.Pair<A,B> output,
                                          PairOutputs.Pair<A,B> inc)

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

  Specified by:
    `subtract` in class `Outputs<PairOutputs.Pair<A,B>>`

### add

    public PairOutputs.Pair<A,B> add(PairOutputs.Pair<A,B> prefix,
                                     PairOutputs.Pair<A,B> output)

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

  Specified by:
    `add` in class `Outputs<PairOutputs.Pair<A,B>>`

### write

    public void write(PairOutputs.Pair<A,B> output,
                      DataOutput writer)
               throws IOException

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

  Specified by:
    `write` in class `Outputs<PairOutputs.Pair<A,B>>`
  Throws:
    `IOException`

### read

    public PairOutputs.Pair<A,B> read(DataInput in)
                               throws IOException

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

  Specified by:
    `read` in class `Outputs<PairOutputs.Pair<A,B>>`
  Throws:
    `IOException`

### getNoOutput

    public PairOutputs.Pair<A,B> 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<PairOutputs.Pair<A,B>>`

### outputToString

    public String outputToString(PairOutputs.Pair<A,B> output)

  Specified by:
    `outputToString` in class `Outputs<PairOutputs.Pair<A,B>>`

### toString

    public String toString()

  Overrides:
    `toString` in class `Object`

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