de.aristaflow.adept2.model.logmanagement

Class Column

java.lang.Object

de.aristaflow.adept2.model.logmanagement.Column

All Implemented Interfaces:

java.io.Serializable

public class Column
extends java.lang.Object
implements java.io.Serializable

Represents a column in the entry schema of a log in the log management facility, aka. log manager

Columns may not contain an underscore _. Otherwise they may be legal SQL identifiers, which may depend on the actual DBMS. So it's a good idea to stick with the Latin alphabet and digits. Also the names id and refId may not be used because these identifiers are used internally.

Author:

Patrick Schmidt

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static Column	ID_COLUMN The ID column added to every log to identify the log entries.
static Column	REF_COLUMN The referenced ID column added to every subschema of a log to identify parent log entry.

Constructor Summary

Constructors

Constructor and Description
Column(java.lang.String name, DataType dataType) Constructs a new Column with the specified data type.
Column(java.lang.String name, int sizeHint) Constructs a string column with the specified size.
Column(java.lang.String name, Schema subSchema) Constructs a complex column with the specified subschema.

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object obj)
DataType	getDataType() Returns the data type of this column.
java.lang.String	getName() Returns the name of this column.
int	getSizeHint() Returns the size hint for this column.
Schema	getSubSchema() Returns the subschema of this column or null if the data type of this column is something else than DataType.COMPLEX.
int	hashCode()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, toString, wait, wait, wait

Field Detail

ID_COLUMN

public static final Column ID_COLUMN

The ID column added to every log to identify the log entries.

REF_COLUMN

public static final Column REF_COLUMN

The referenced ID column added to every subschema of a log to identify parent log entry.

Constructor Detail

Column

public Column(java.lang.String name,
              DataType dataType)

Constructs a new Column with the specified data type.

There are separate constructors for DataType.STRING and DataType.COMPLEX. This constructor cannot be used for these.

Parameters:

name - the name of the column

dataType - the data type of the column

Column

public Column(java.lang.String name,
              int sizeHint)

Constructs a string column with the specified size.

Parameters:

name - the name of the column

sizeHint - the required number of characters

Column

public Column(java.lang.String name,
              Schema subSchema)

Constructs a complex column with the specified subschema.

Parameters:

name - the name of the column

subSchema - the subschema of the column

Method Detail

getName

public java.lang.String getName()

Returns the name of this column.

Returns:

the name of this column

getDataType

public DataType getDataType()

Returns the data type of this column.

Returns:

the data type of this column

getSubSchema

public Schema getSubSchema()

Returns the subschema of this column or null if the data type of this column is something else than DataType.COMPLEX.

Returns:

the subschema of this column or null

getSizeHint

public int getSizeHint()

Returns the size hint for this column. Currently this value is only used for DataType.STRING and indicates the required capacity when creating the required tables of a log.

Returns:

the size hint of this column

equals

public boolean equals(java.lang.Object obj)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object