ASTExpression.ConstResult (PMD Java 7.13.0-SNAPSHOT API)

java.lang.Object
- net.sourceforge.pmd.lang.java.ast.ASTExpression.ConstResult

Enclosing interface:

ASTExpression
```
public static final class ASTExpression.ConstResult
extends Object
```
Result of constant folding an expression. This can be in one of three states:
- No constant value: constant folding failed, meaning, the value of the expression is not known at compile time.
- Has compile-time constant value: there is a constant value, and it is a compile-time constant in the sense of the JLS. Such constants are inlined in class files. One restriction on them is that they only use literals or CT-constant fields (which must be static final and have a CT-constant initializer), but not final variables or non-static fields for instance.
- Has value, not compile-time constant: we could compute a constant value, but it is not CT-constant in the sense of the JLS. Maybe it uses the constant initializer of a final local variable for instance.
Since:

7.12.0

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`@Nullable Object`	`getValue()`	Get the value, or null if no value could be computed.
`boolean`	`hasValue()`	If true, a constant value could be computed.
`boolean`	`isCompileTimeConstant()`	If true, this value is a compile-time constant in the sense of the JLS.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - isCompileTimeConstant
```
public boolean isCompileTimeConstant()
```
    If true, this value is a compile-time constant in the sense of the JLS. See class description.
  - hasValue
```
public boolean hasValue()
```
    If true, a constant value could be computed. It is not necessarily a CT-constant. See class description.
  - getValue
```
public @Nullable Object getValue()
```
    Get the value, or null if no value could be computed. The value has one of the primitive wrapper types, or String type.