com.bloomberglp.blpapi

Class SchemaElementDefinition

java.lang.Object

com.bloomberglp.blpapi.SchemaElementDefinition

public abstract class SchemaElementDefinition
extends Object

The definition of an item in a data schema.

SchemaElementDefinition are returned by Service objects and Operation objects to define the content of requests, replies and events. The SchemaTypeDefinition returned by typeDefinition() may itself return SchemaElementDefinition objects when the schema contains complex items. SchemaElementDefinition objects are read-only and always created by the API, never by the application. The SchemaElementDefinition defines the symbolic name any constraints on this item and the SchemaTypeDefinition which represents instances of this item.

An item which is optional in the schema has minValues()== 0.

An item which is mandatory in the schema has minValues() >= 1.

An item which is a single value has maxValues() == 1.

An item which is an array has maxValues() > 1.

An item which is an unbounded array has maxValues() == UNBOUNDED.

As well as the symbolic name, array constraints and other constraints this class also provides access to the description and status of the item.

Author:

Chao Yao(cyao3)

Field Summary

Fields

Modifier and Type	Field and Description
static int	UNBOUNDED Indicates that an array element has an unbounded number of values

Constructor Summary

Constructors

Constructor and Description
SchemaElementDefinition()

Method Summary

Modifier and Type	Method and Description
abstract ConstraintsList	constraints()
abstract String	description() Return a String containing a human readable description of this item
abstract Name	getAlternateName(int index) Return the alternate name for this item at the specified index
abstract int	maxValues() Return the maximum number of occurences of the this item.
abstract int	minValues() Return the minimum number of occurences of this item.
abstract Name	name() Return the name of this item
abstract int	numAlternateNames() Return the number of alternate names for this item
abstract void	setUserData(Object userData) Set the user data associated with this object to the specified userData.
abstract Schema.Status	status() Return the status of this SchemaElementDefinition
abstract SchemaTypeDefinition	typeDefinition() Return the SchemaTypeDefinition of this item
abstract Object	userData() Return the user data associated with this ElementDefinition

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

UNBOUNDED

public static final int UNBOUNDED

Indicates that an array element has an unbounded number of values

See Also:

Constant Field Values

Constructor Detail

SchemaElementDefinition

public SchemaElementDefinition()

Method Detail

setUserData

public abstract void setUserData(Object userData)

Set the user data associated with this object to the specified userData.

name

public abstract Name name()

Return the name of this item

numAlternateNames

public abstract int numAlternateNames()

Return the number of alternate names for this item

getAlternateName

public abstract Name getAlternateName(int index)

Return the alternate name for this item at the specified index

Throws:

IndexOutOfBoundsException - if index >= numAlternateNames()

description

public abstract String description()

Return a String containing a human readable description of this item

status

public abstract Schema.Status status()

Return the status of this SchemaElementDefinition

typeDefinition

public abstract SchemaTypeDefinition typeDefinition()

Return the SchemaTypeDefinition of this item

minValues

public abstract int minValues()

Return the minimum number of occurences of this item. This value is always >= 0.

maxValues

public abstract int maxValues()

Return the maximum number of occurences of the this item. This value may be UNBOUNDED (-1) or any value >= 1.

constraints

public abstract ConstraintsList constraints()

userData

public abstract Object userData()

Return the user data associated with this ElementDefinition