OtpErlangTuple (Java-Erlang Interface Library)
Keywords: com.ericsson.otp.erlang.OtpErlangTuple class

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## com.ericsson.otp.erlang
Class OtpErlangTuple

    java.lang.Object
      com.ericsson.otp.erlang.OtpErlangObject
          com.ericsson.otp.erlang.OtpErlangTuple

All Implemented Interfaces:
  java.io.Serializable, java.lang.Cloneable

    public class OtpErlangTuple

extends OtpErlangObject
implements java.io.Serializable, java.lang.Cloneable

Provides a Java representation of Erlang tuples. Tuples are created from one or more arbitrary Erlang terms.

The arity of the tuple is the number of elements it contains. Elements are indexed from 0 to (arity-1) and can be retrieved individually by using the appropriate index.

See Also:
  Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.ericsson.otp.erlang.OtpErlangObject
`OtpErlangObject.Hash`

Field Summary

Fields inherited from class com.ericsson.otp.erlang.OtpErlangObject
`hashCodeValue`

Constructor Summary
`OtpErlangTuple(OtpErlangObject elem)` Create a unary tuple containing the given element.
`OtpErlangTuple(OtpErlangObject[] elems)` Create a tuple from an array of terms.
`OtpErlangTuple(OtpErlangObject[] elems, int start, int count)` Create a tuple from an array of terms.
`OtpErlangTuple(OtpInputStream buf)` Create a tuple from a stream containing an tuple encoded in Erlang external format.

Method Summary
`int` | `arity()` Get the arity of the tuple.
`java.lang.Object` | `clone()`
`protected int` | `doHashCode()`
`OtpErlangObject` | `elementAt(int i)` Get the specified element from the tuple.
`OtpErlangObject[]` | `elements()` Get all the elements from the tuple as an array.
`void` | `encode(OtpOutputStream buf)` Convert this tuple to the equivalent Erlang external representation.
`boolean` | `equals(java.lang.Object o)` Determine if two tuples are equal.
`java.lang.String` | `toString()` Get the string representation of the tuple.

Methods inherited from class com.ericsson.otp.erlang.OtpErlangObject
`decode, hashCode`

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

Constructor Detail

### OtpErlangTuple

    public OtpErlangTuple(OtpErlangObject elem)

  Create a unary tuple containing the given element.

  Parameters:
    `elem` - the element to create the tuple from.
  Throws:
    `java.lang.IllegalArgumentException` - if the element is null.

### OtpErlangTuple

    public OtpErlangTuple(OtpErlangObject[] elems)

  Create a tuple from an array of terms.

  Parameters:
    `elems` - the array of terms to create the tuple from.
  Throws:
    `java.lang.IllegalArgumentException` - if the array is empty (null) or contains null elements.

### OtpErlangTuple

    public OtpErlangTuple(OtpErlangObject[] elems,
                          int start,
                          int count)

  Create a tuple from an array of terms.

  Parameters:
    `elems` - the array of terms to create the tuple from.
    `start` - the offset of the first term to insert.
    `count` - the number of terms to insert.
  Throws:
    `java.lang.IllegalArgumentException` - if the array is empty (null) or contains null elements.

### OtpErlangTuple

    public OtpErlangTuple(OtpInputStream buf)
                   throws OtpErlangDecodeException

  Create a tuple from a stream containing an tuple encoded in Erlang external format.

  Parameters:
    `buf` - the stream containing the encoded tuple.
  Throws:
    `OtpErlangDecodeException` - if the buffer does not contain a valid external representation of an Erlang tuple.

Method Detail

### arity

    public int arity()

  Get the arity of the tuple.

  Returns:
    the number of elements contained in the tuple.

### elementAt

    public OtpErlangObject elementAt(int i)

  Get the specified element from the tuple.

  Parameters:
    `i` - the index of the requested element. Tuple elements are numbered as array elements, starting at 0.
  Returns:
    the requested element, of null if i is not a valid element index.

### elements

    public OtpErlangObject[] elements()

  Get all the elements from the tuple as an array.

  Returns:
    an array containing all of the tuple's elements.

### toString

    public java.lang.String toString()

  Get the string representation of the tuple.

  Specified by:
    `toString` in class `OtpErlangObject`
  Returns:
    the string representation of the tuple.

### encode

    public void encode(OtpOutputStream buf)

  Convert this tuple to the equivalent Erlang external representation.

  Specified by:
    `encode` in class `OtpErlangObject`
  Parameters:
    `buf` - an output stream to which the encoded tuple should be written.

### equals

    public boolean equals(java.lang.Object o)

  Determine if two tuples are equal. Tuples are equal if they have the same arity and all of the elements are equal.

  Specified by:
    `equals` in class `OtpErlangObject`
  Parameters:
    `o` - the tuple to compare to.
  Returns:
    true if the tuples have the same arity and all the elements are equal.

### doHashCode

    protected int doHashCode()

  Overrides:
    `doHashCode` in class `OtpErlangObject`

### clone

    public java.lang.Object clone()

  Overrides:
    `clone` in class `OtpErlangObject`

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