bea.jolt.pool

Class DataSet

java.lang.Object

java.util.Dictionary<K,V>

java.util.Hashtable

bea.jolt.pool.DataSet

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.util.Map

Direct Known Subclasses:

Result, ServletDataSet

public class DataSet
extends java.util.Hashtable

This class contains data elements that contain the input or output parameters of a BEA Tuxedo service. The names of the elements in the data set must match exactly the names of the parameters used in the service. To access service parameters that have multiple occurrences, both the name of the element and its index should be used.

BEA Tuxedo services expect parameters to be of certain types. The following list shows the data types accepted by a BEA Tuxedo service and the Java classes that they map to.

 BEA Tuxedo       Java
 ----------------------
 char             Byte
 short            Short
 long             Integer
 float            Float
 double           Double
 char*            String
 CARRAY           byte[]
 

Each parameter value returned from a BEA Tuxedo service is always converted from its BEA Tuxedo data type to an instance of the corresponding Java class in the preceding list.

A parameter that is sent to a BEA Tuxedo service can either be an instance of the Java class corresponding to its BEA Tuxedo data type in the list above, or a String. If the parameter is a passed as a String, it is converted to the appropriate type for sending to the BEA Tuxedo service. Conversion is done according to the definition of the parameter in the BEA Jolt Repository. For conversion to be successful, the String must contain a meaningful value, such as "123.45" if the service parameter is a float. To pass CARRAY data as a String, represent the CARRAY (binary) data as a String of hexadecimal digits, such as "FF12EB0A".

Author:

Copyright (c) 1999 by BEA Systems, Inc. All Rights Reserved.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
DataSet() Constructs a default DataSet with an initial capacity of ten elements
DataSet(int initCapacity) Constructs a DataSet with a specified initial capacity

Method Summary

Methods

Modifier and Type	Method and Description
int	getCount(java.lang.String name) Gets the number of occurrences of the data element with the specified name.
java.lang.Object	getValue(java.lang.String name, int index, java.lang.Object defval) Gets the data element associated with the specified name and index.
java.lang.Object	getValue(java.lang.String name, java.lang.Object defval) Gets the data element associated with the specified name.
void	setValue(java.lang.String name, int index, java.lang.Object value) Sets the value of a data element associated with the specified name and index.
void	setValue(java.lang.String name, java.lang.Object value) Sets the value of a data element associated with the specified name.

Methods inherited from class java.util.Hashtable

clear, clone, contains, containsKey, containsValue, elements, entrySet, equals, get, hashCode, isEmpty, keys, keySet, put, putAll, remove, size, toString, values

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DataSet

public DataSet()

Constructs a default DataSet with an initial capacity of ten elements

DataSet

public DataSet(int initCapacity)

Constructs a DataSet with a specified initial capacity

Parameters:

initCapacity - Initial capacity

Method Detail

getValue

public java.lang.Object getValue(java.lang.String name,
                        int index,
                        java.lang.Object defval)

Gets the data element associated with the specified name and index. Returns an Object that should be cast to the appropriate type depending on the BEA Tuxedo service definition. The following code handles a return parameter called "BALANCE", that is of type float:

 Float balance = (Float) getValue ("BALANCE", 0, null);
 

Parameters:

name - Name of the data element

index - Index of the data element, starting from 0

defval - Default value to return if the data element does not exist

Returns:

Data element or the default value

See Also:

getValue(java.lang.String, java.lang.Object)

getValue

public java.lang.Object getValue(java.lang.String name,
                        java.lang.Object defval)

Gets the data element associated with the specified name. This is equivalent to calling the getValue(name, index, defval) method with an index of zero.

Parameters:

name - Name of the data element

defval - Default value to return if the data element does not exist

Returns:

Data element or the default value

See Also:

getValue(java.lang.String, int, java.lang.Object)

setValue

public void setValue(java.lang.String name,
            int index,
            java.lang.Object value)

Sets the value of a data element associated with the specified name and index. The value parameter must be one of the following types: String, Short, Integer, Float, Double, Byte or byte[]. The Java class of value must be consistent with the definition of the parameter in the BEA Jolt Repository, or it must be a String value. If value is given in String format, data conversion of the parameter is performed (using the service definition retrieved from the BEA Jolt Repository) before the BEA Tuxedo service is invoked.

The following code shows how to set the value of a service parameter called "ACCOUNT_ID".

This sample shows a value passed as an Integer (long in BEA Tuxedo).

 DataSet dataset = new DataSet();
 Integer val = new Integer(10);
 dataset.setValue("ACCOUNT_ID", 0, val);
 

The value of the parameter could also be passed as a String.

 DataSet dataset = new DataSet();
 String val = "10"; // This is a valid integer representation
 dataset.setValue("ACCOUNT_ID", 0, val);
 

Parameters:

name - Name of the data element

index - Occurrence index of the data element, starting from zero

value - Data element

See Also:

setValue(java.lang.String, java.lang.Object)

setValue

public void setValue(java.lang.String name,
            java.lang.Object value)

Sets the value of a data element associated with the specified name. This is equivalent to calling the setValue(name, index, value) method with an index of zero.

Parameters:

name - Name of the data element

value - String value for the data element

See Also:

setValue(java.lang.String, int, java.lang.Object)

getCount

public int getCount(java.lang.String name)

Gets the number of occurrences of the data element with the specified name.

Parameters:

name - Name of the data element

Returns:

Number of occurrences of the data element