org.apache.ws.jaxme.js
Interface DirectAccessible

All Superinterfaces:

TypedValue

All Known Subinterfaces:

LocalJavaField

All Known Implementing Classes:

ConditionalIndentationJavaSourceObject.LJFImpl, ConditionalIndentationJavaSourceObject.LoopVariable, JavaField, Parameter

public interface DirectAccessible
extends TypedValue

This interface is an abstract base for fields and similar objects. It doesn't define many methods, it mainly indicates, that the implementations value is directly and fast accessible in the generated code. The use is best demonstrated by an example. Suggest the following piece of code:

     Object value;
     return new Object[]{"((", value, ") * (", value, "))"};
 

The example is well suited for the case, where value is a variable name like "i". It is not suited, if "value" contains an expensive method call like "sin(x)". It is even wrong in the case "i++".

By using the interface DirectAccessible, you can change the implementation of getSquare() to look like this:

     Object value;
     JavaQName type;
     if (!(value instanceof DirectAccessible)) {
       LocalJavaField v = pMethod.newJavaField(type);
       v.addLine(value);
       v.setFinal(true);
       value = v;
     }
     return new Object[]{"((", value, ") * (", value, "))"};
 

This results in code, which is far more readable and better optimized.

Author:

Jochen Wiedmann

Method Summary

boolean	isNullable() Returns whether the value is possibly null.
void	setNullable(boolean pNullable) Sets whether the value is possibly null.

Methods inherited from interface org.apache.ws.jaxme.js.TypedValue

getType

Method Detail

isNullable

boolean isNullable()

Returns whether the value is possibly null.

setNullable

void setNullable(boolean pNullable)

Sets whether the value is possibly null.