Package org.qdl_lang.extensions.examples.basic

Class StemEntryVar

java.lang.Object

org.qdl_lang.extensions.examples.basic.StemEntryVar

All Implemented Interfaces:

Serializable, QDLVariable

public class StemEntryVar
extends Object
implements QDLVariable

This shows that you can set individual values with a stem. The stem, however, is in the module. If you import this module to the variable eg, then it creates the value eg#a.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static String	STEM_NAME

Constructor Summary

Constructors

Constructor	Description
StemEntryVar()

Method Summary

Modifier and Type	Method	Description
String	getName()	The name of the variable.
Object	getValue()	The value.

Methods inherited from class java.lang.Object

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

Field Detail

STEM_NAME

public static String STEM_NAME

Constructor Detail

StemEntryVar

public StemEntryVar()

Method Detail

getName

public String getName()

Description copied from interface: QDLVariable

The name of the variable. This may be a simple name for a scalar, like "a", or it may represent a stem, like "a." (yes, include the period for a stem). You may even set specific stem values by passing in the indexed stem, e.g. "a.3". It might make sense, if e.g. you had a stem that modelled String Theory where the stem is an 11 dimensional object that required a great deal of computation only do-able in Java (such as a specialized scientific library which would be a hugely complex job to expose in QDL). You could then just set each component of the stem.

A note on extrinsic values

Extrinsic values start with a $$ (VariableState.EXTRINSIC_MARKER) and when the module is loaded, these are put into the workspace -- not at import. This lets you have module constants in advance of configuration the module.

Specified by:

getName in interface QDLVariable

Returns:

getValue

public Object getValue()

Description copied from interface: QDLVariable

The value. The basic Java types that QDL knows are Boolean, String, Long, BigDecimal, edu.uiuc.ncsa.qdl.variables.QDLSet and QDLStem. Again, this class sets the value and is used to create a single instance of this variable in the workspace, so there should be no state to manage in this class -- just return the value it should have.

Specified by:

getValue in interface QDLVariable

Returns: