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## org.modeshape.graph.query.validate
Interface Schemata.Key

All Known Implementing Classes:
  ImmutableKey

Enclosing interface:
  Schemata

    public static interface Schemata.Key

Information about a key for a table.

Method Summary
`Set<Schemata.Column>` | `getColumns()` Get the columns that make up this key.
`boolean` | `hasColumns(Iterable<Schemata.Column> columns)` Determine whether this key contains exactly those columns listed.
`boolean` | `hasColumns(Schemata.Column... columns)` Determine whether this key contains exactly those columns listed.

Method Detail

### getColumns

    Set<Schemata.Column> getColumns()

  Get the columns that make up this key.

  Returns:
    the key's columns; immutable and never null

### hasColumns

    boolean hasColumns(Schemata.Column... columns)

  Determine whether this key contains exactly those columns listed.

  Parameters:
    `columns` - the columns for the key
  Returns:
    true if this key contains exactly the supplied columns, or false otherwise

### hasColumns

    boolean hasColumns(Iterable<Schemata.Column> columns)

  Determine whether this key contains exactly those columns listed.

  Parameters:
    `columns` - the columns for the key
  Returns:
    true if this key contains exactly the supplied columns, or false otherwise

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