org.apache.empire.db

Class DBView.DBViewColumn

java.lang.Object

org.apache.empire.db.DBObject

org.apache.empire.db.DBExpr

org.apache.empire.db.DBColumnExpr

org.apache.empire.db.DBColumn

org.apache.empire.db.DBView.DBViewColumn

All Implemented Interfaces:

Serializable, Column, ColumnExpr

Enclosing class:

DBView

public static class DBView.DBViewColumn
extends DBColumn

DBViewColumn

Author:

doebele

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected DBColumnExpr	expr
protected double	size
protected DBColumn	updateColumn

Fields inherited from class org.apache.empire.db.DBColumn

comment, DBCOLATTR_SINGLEBYTECHARS, name, rowset

Fields inherited from class org.apache.empire.db.DBColumnExpr

attributes, beanPropertyName, DBCOLATTR_TITLE, DBCOLATTR_TYPE, options

Fields inherited from class org.apache.empire.db.DBExpr

CTX_ALIAS, CTX_ALL, CTX_DEFAULT, CTX_FULLNAME, CTX_NAME, CTX_NOPARENTHESES, CTX_VALUE

Fields inherited from interface org.apache.empire.data.Column

COLATTR_CURRENCY_CODE, COLATTR_DATETIMEPATTERN, COLATTR_ENUMTYPE, COLATTR_FRACTION_DIGITS, COLATTR_INTEGER_DIGITS, COLATTR_MAXVALUE, COLATTR_MINLENGTH, COLATTR_MINVALUE, COLATTR_NUMBER_GROUPSEP, COLATTR_NUMBER_TYPE, COLATTR_REGEXP, COLATTR_TITLE, COLATTR_TOOLTIP, COLATTR_TYPE

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	DBViewColumn(DBView view, String name, DBColumnExpr expr, double size) Constructs a DBViewColumn object set the specified parameters to this object.

Method Summary

Modifier and Type	Method and Description
Element	addXml(Element parent, long flags) Add a description of this column with relevant metadata to the supplied parent XML Element.
Object	getAttribute(String name) Returns the value of a column attribute.
DataType	getDataType() Returns the data type of this column expression.
Options	getOptions() Returns the list of options for this column containing all possible field values.
double	getSize() Returns the size of the column.
DBColumnExpr	getSourceColumnExpr()
DBView	getView()
boolean	isAutoGenerated() Returns true if column is a columns value is an automatically generated value
boolean	isReadOnly() Returns true if the column is read-only.
boolean	isRequired() Returns true if the column is required.
Object	validate(Object value) Checks if the given value is a valid value for this column If not, an exception is thrown

Methods inherited from class org.apache.empire.db.DBColumn

addReferencedColumns, addSQL, checkValue, decodeEnum, decodeSort, equals, findById, getAlias, getComment, getDatabase, getEnumType, getFullName, getId, getName, getRowSet, getUpdateColumn, hashCode, isAggregate, isEnum, qualified, setComment, to, toString

Methods inherited from class org.apache.empire.db.DBColumnExpr

abs, append, as, as, asc, avg, ceiling, cmp, coalesce, convertTo, convertTo, count, countDistinct, day, decode, decode, decode, decode, decode, decode, decodeEnum, decodeSort, desc, divideBy, floor, format, getBeanPropertyName, getControlType, getExprFromPhrase, getExprFromPhrase, getSourceColumn, getTitle, in, in, in, indexOf, indexOf, indexOf, is, isBetween, isGreaterThan, isLessOrEqual, isMoreOrEqual, isNot, isNotBetween, isSmallerThan, length, like, like, likeLower, likeUpper, lower, max, min, minus, minus, modulo, month, multiplyWith, notIn, notIn, notIn, notLike, nvl, parenthesis, plus, plus, replace, reverse, round, setAttribute, setBeanPropertyName, setControlType, setOptions, setTitle, substring, substring, substring, substring, substring, substring, sum, toChar, toChar, trim, trimLeft, trimRight, trunc, upper, when, year

Methods inherited from class org.apache.empire.db.DBExpr

getObjectValue, getValueClass

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.empire.data.ColumnExpr

getBeanPropertyName, getControlType, getSourceColumn, getTitle

Field Detail

expr

protected final DBColumnExpr expr

updateColumn

protected final DBColumn updateColumn

size

protected final double size

Constructor Detail

DBViewColumn

protected DBViewColumn(DBView view,
                       String name,
                       DBColumnExpr expr,
                       double size)

Constructs a DBViewColumn object set the specified parameters to this object.

Parameters:

view - the DBView object

expr - the DBColumnExpr of the source table

Method Detail

getSourceColumnExpr

public DBColumnExpr getSourceColumnExpr()

getView

public DBView getView()

getDataType

public DataType getDataType()

Description copied from class: DBColumnExpr

Returns the data type of this column expression.

Specified by:

getDataType in interface ColumnExpr

Specified by:

getDataType in class DBColumnExpr

Returns:

the expressions data type

See Also:

DataType

getSize

public double getSize()

Description copied from class: DBColumn

Returns the size of the column.

Specified by:

getSize in interface Column

Specified by:

getSize in class DBColumn

Returns:

Returns the size of the column

isAutoGenerated

public boolean isAutoGenerated()

Description copied from class: DBColumn

Returns true if column is a columns value is an automatically generated value

Specified by:

isAutoGenerated in interface Column

Specified by:

isAutoGenerated in class DBColumn

Returns:

true if column is auto-generated

isReadOnly

public boolean isReadOnly()

Description copied from class: DBColumn

Returns true if the column is read-only.

Specified by:

isReadOnly in interface Column

Specified by:

isReadOnly in class DBColumn

Returns:

Returns true if the column is read-only

isRequired

public boolean isRequired()

Description copied from class: DBColumn

Returns true if the column is required.

Specified by:

isRequired in interface Column

Specified by:

isRequired in class DBColumn

Returns:

Returns true if the column is required

validate

public Object validate(Object value)

Description copied from class: DBColumn

Checks if the given value is a valid value for this column If not, an exception is thrown

Specified by:

validate in interface Column

Specified by:

validate in class DBColumn

Returns:

the value the validated and possibly converted value

getAttribute

public Object getAttribute(String name)

Description copied from class: DBColumnExpr

Returns the value of a column attribute. Column attributes are used to provide metadata for a column.

Specified by:

getAttribute in interface ColumnExpr

Overrides:

getAttribute in class DBColumn

Parameters:

name - the attribute name

Returns:

value of the attribute if it exists or null otherwise

See Also:

DBColumnExpr.getAttribute(String)

getOptions

public Options getOptions()

Description copied from class: DBColumnExpr

Returns the list of options for this column containing all possible field values.

Specified by:

getOptions in interface ColumnExpr

Overrides:

getOptions in class DBColumn

Returns:

the list of options

See Also:

DBColumnExpr.getOptions()

addXml

public Element addXml(Element parent,
                      long flags)

Description copied from class: DBColumnExpr

Add a description of this column with relevant metadata to the supplied parent XML Element.

Specified by:

addXml in class DBColumn

Parameters:

parent - the parent element to which to append the column description

flags - currently not used

Returns:

the newly created child element