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Inheritance: java.lang.Object, com.groupdocs.assembly.system.data.Constraint
public class UniqueConstraint extends Constraint
Represents a restriction on a set of columns in which all values must be unique.
| Constructor | Description |
|---|---|
| UniqueConstraint(String name, DataColumn[] columns, boolean isPrimaryKey) | Initializes a new instance of the UniqueConstraint class with the specified name, an array of DataColumn objects to constrain, and a value specifying whether the constraint is a primary key. |
| UniqueConstraint(DataColumn[] columns, boolean isPrimaryKey) | Initializes a new instance of the UniqueConstraint class with an array of DataColumn objects to constrain, and a value specifying whether the constraint is a primary key. |
| UniqueConstraint(DataColumn[] columns) | Initializes a new instance of the UniqueConstraint class with the given array of DataColumn objects. |
| UniqueConstraint(DataColumn column) | Initializes a new instance of the UniqueConstraint class with the specified DataColumn. |
| Method | Description |
|---|---|
| hashCode() | |
| equals(Object key2) | Compares this constraint to a second to determine if both are identical. |
| getColumns() | Gets the array of columns that this constraint affects. |
| isPrimaryKey() | Gets a value indicating whether or not the constraint is on a primary key. |
| getTable() | Gets the table to which this constraint belongs. |
public UniqueConstraint(String name, DataColumn[] columns, boolean isPrimaryKey)
Initializes a new instance of the UniqueConstraint class with the specified name, an array of DataColumn objects to constrain, and a value specifying whether the constraint is a primary key.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| name | java.lang.String | The name of the constraint. |
| columns | DataColumn[] | An array of DataColumn objects to constrain. |
| isPrimaryKey | boolean | true to indicate that the constraint is a primary key; otherwise, false. |
public UniqueConstraint(DataColumn[] columns, boolean isPrimaryKey)
Initializes a new instance of the UniqueConstraint class with an array of DataColumn objects to constrain, and a value specifying whether the constraint is a primary key.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| columns | DataColumn[] | An array of DataColumn objects to constrain. |
| isPrimaryKey | boolean | true to indicate that the constraint is a primary key; otherwise, false. |
public UniqueConstraint(DataColumn[] columns)
Initializes a new instance of the UniqueConstraint class with the given array of DataColumn objects.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| columns | DataColumn[] | The array of DataColumn objects to constrain. |
public UniqueConstraint(DataColumn column)
Initializes a new instance of the UniqueConstraint class with the specified DataColumn.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| column | DataColumn | The DataColumn to constrain. |
public int hashCode()
Returns: int
public boolean equals(Object key2)
Compares this constraint to a second to determine if both are identical.
Parameters:
| Parameter | Type | Description |
|---|---|---|
| key2 | java.lang.Object | The object to which this UniqueConstraint is compared. |
Returns: boolean - true, if the contraints are equal; otherwise, false.
public DataColumn[] getColumns()
Gets the array of columns that this constraint affects.
Returns: com.groupdocs.assembly.system.data.DataColumn[] - An array of DataColumn objects.
public boolean isPrimaryKey()
Gets a value indicating whether or not the constraint is on a primary key.
Returns: boolean - true, if the constraint is on a primary key; otherwise, false.
public DataTable getTable()
Gets the table to which this constraint belongs.
Returns: DataTable - The DataTable to which the constraint belongs.
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