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## org.basex.query.xquery.item
Class Seq

    java.lang.Object
      org.basex.query.ExprInfo
          org.basex.query.xquery.expr.Expr
              org.basex.query.xquery.item.Item
                  org.basex.query.xquery.item.Seq

    public class Seq

extends Item

Item sequence.

Author:
  Workgroup DBIS, University of Konstanz 2005-08, ISC License, Christian Gruen

Nested Class Summary

Nested classes/interfaces inherited from class org.basex.query.xquery.expr.Expr
`Expr.Return, Expr.Using`

Field Summary
`static Seq` | `EMPTY` Empty sequence.
`int` | `size` Number of entries.
`Item[]` | `val` Item array.

Fields inherited from class org.basex.query.xquery.item.Item
`type`

Method Summary
`boolean` | `bool()` Returns a boolean representation of the item.
`int` | `diff(Item it)` Returns the difference between the current and the specified item.
`boolean` | `eq(Item it)` Checks the items for equality.
`static Item` | `get(Item[] v, int s)` Constructor.
`boolean` | `i()` Checks if this is an item.
`Iter` | `iter()` Returns an item iterator.
`void` | `plan(Serializer ser)` Recursively sends the abstract syntax of this expression to the specified serializer.
`int` | `size()` Returns the sequence size or 1.
`byte[]` | `str()` Returns an atomized string.
`java.lang.String` | `toString()`

Methods inherited from class org.basex.query.xquery.item.Item
`castErr, comp, d, dbl, dec, flt, hash, iter, itr, java, n, name, node, returned, s, score, score, serialize, u, uses`

Methods inherited from class org.basex.query.xquery.expr.Expr
`e`

Methods inherited from class org.basex.query.ExprInfo
`color, info`

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

Field Detail

### EMPTY

    public static final Seq EMPTY

  Empty sequence.

### val

    public Item[] val

  Item array.

### size

    public int size

  Number of entries.

Method Detail

### get

    public static Item get(Item[] v,
                           int s)

  Constructor.

  Parameters:
    `v` - value
    `s` - size
  Returns:
    resulting item or sequence

### i

    public final boolean i()

  Description copied from class: `Expr`
  Checks if this is an item.

  Overrides:
    `i` in class `Item`
  Returns:
    result of check

### size

    public int size()

  Description copied from class: `Item`
  Returns the sequence size or 1.

  Overrides:
    `size` in class `Item`
  Returns:
    result of check

### str

    public byte[] str()

  Description copied from class: `Item`
  Returns an atomized string.

  Overrides:
    `str` in class `Item`
  Returns:
    string representation

### bool

    public boolean bool()
                 throws XQException

  Description copied from class: `Item`
  Returns a boolean representation of the item.

  Overrides:
    `bool` in class `Item`
  Returns:
    boolean value
  Throws:
    `XQException` - evaluation exception

### iter

    public Iter iter()

  Description copied from class: `Item`
  Returns an item iterator.

  Overrides:
    `iter` in class `Item`
  Returns:
    iterator

### eq

    public boolean eq(Item it)
               throws XQException

  Description copied from class: `Item`
  Checks the items for equality.

  Specified by:
    `eq` in class `Item`
  Parameters:
    `it` - item to be compared.
  Returns:
    result of check
  Throws:
    `XQException` - evaluation exception

### diff

    public int diff(Item it)

  Description copied from class: `Item`
  Returns the difference between the current and the specified item.

  Overrides:
    `diff` in class `Item`
  Parameters:
    `it` - item to be compared.
  Returns:
    difference

### toString

    public java.lang.String toString()

  Overrides:
    `toString` in class `Item`

### plan

    public void plan(Serializer ser)
              throws java.io.IOException

  Description copied from class: `ExprInfo`
  Recursively sends the abstract syntax of this expression to the specified serializer.

  Overrides:
    `plan` in class `Item`
  Parameters:
    `ser` - serializer
  Throws:
    `java.io.IOException` - exception

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