java.lang.Object
- org.scijava.util.ReflectedUniverse

```
public class ReflectedUniverse
extends Object
```
A general-purpose reflection wrapper class.
Note: use of this class is discouraged in favor of compile-time (i.e., type-safe) dependency linkages. However, there are times when it proves very useful for writing blocks of reflected code in a more succinct way than you can do with the vanilla java.lang.reflect API. Of course, debugging such reflected code becomes much more difficult—caveat emptor!

Author:

Curtis Rueden

Constructor Summary

Constructors
Constructor	Description
`ReflectedUniverse()`	Constructs a new reflected universe.
`ReflectedUniverse(ClassLoader loader)`	Constructs a new reflected universe that uses the given class loader.
`ReflectedUniverse(URL[] urls)`	Constructs a new reflected universe, with the given URLs representing additional search paths for imported classes (in addition to the CLASSPATH).

Method Summary

All Methods Static Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Object`	`exec(String command)`	Executes a command in the universe.
`Object`	`getVar(String varName)`	Returns the value of a variable or field in the universe.
`boolean`	`isAccessibilityIgnored()`	Gets whether access modifiers (protected, private, etc.) are ignored.
`static boolean`	`isInstance(Class<?> c, Object o)`	Returns whether the given object is compatible with the specified class for the purposes of reflection.
`static void`	`main(String[] args)`	Allows exploration of a reflected universe in an interactive environment.
`void`	`setAccessibilityIgnored(boolean ignore)`	Sets whether access modifiers (protected, private, etc.) are ignored.
`void`	`setVar(String varName, boolean b)`	Registers a variable of primitive type boolean in the universe.
`void`	`setVar(String varName, byte b)`	Registers a variable of primitive type byte in the universe.
`void`	`setVar(String varName, char c)`	Registers a variable of primitive type char in the universe.
`void`	`setVar(String varName, double d)`	Registers a variable of primitive type double in the universe.
`void`	`setVar(String varName, float f)`	Registers a variable of primitive type float in the universe.
`void`	`setVar(String varName, int i)`	Registers a variable of primitive type int in the universe.
`void`	`setVar(String varName, long l)`	Registers a variable of primitive type long in the universe.
`void`	`setVar(String varName, short s)`	Registers a variable of primitive type short in the universe.
`void`	`setVar(String varName, Object obj)`	Registers a variable in the universe.

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

- Constructor Detail
  - ReflectedUniverse
```
public ReflectedUniverse()
```
    Constructs a new reflected universe.
  - ReflectedUniverse
```
public ReflectedUniverse(URL[] urls)
```
    Constructs a new reflected universe, with the given URLs representing additional search paths for imported classes (in addition to the CLASSPATH).
  - ReflectedUniverse
```
public ReflectedUniverse(ClassLoader loader)
```
    Constructs a new reflected universe that uses the given class loader.
- Method Detail
  - isInstance
```
public static boolean isInstance(Class<?> c,
                                 Object o)
```
    Returns whether the given object is compatible with the specified class for the purposes of reflection.
  - exec
```
public Object exec(String command)
            throws ReflectException
```
    Executes a command in the universe. The following syntaxes are valid:
    
    import fully.qualified.package.ClassName
    
    var = new ClassName(param1, ..., paramN)
    
    var.method(param1, ..., paramN)
    
    var2 = var.method(param1, ..., paramN)
    
    ClassName.method(param1, ..., paramN)
    
    var2 = ClassName.method(param1, ..., paramN)
    
    var2 = var
    
    Important guidelines:
    
    Any referenced class must be imported first using "import".
    
    Variables can be exported from the universe with getVar().
    
    Variables can be imported to the universe with setVar().
    
    Each parameter must be either:
    
    a variable in the universe
    
    a static or instance field (i.e., no nested methods)
    
    a string literal (remember to escape the double quotes)
    
    an integer literal
    
    a long literal (ending in L)
    
    a double literal (containing a decimal point)
    
    a boolean literal (true or false)
    
    the null keyword
    Throws:
    
    ReflectException
  - setVar
```
public void setVar(String varName,
                   Object obj)
```
    Registers a variable in the universe.
  - setVar
```
public void setVar(String varName,
                   boolean b)
```
    Registers a variable of primitive type boolean in the universe.
  - setVar
```
public void setVar(String varName,
                   byte b)
```
    Registers a variable of primitive type byte in the universe.
  - setVar
```
public void setVar(String varName,
                   char c)
```
    Registers a variable of primitive type char in the universe.
  - setVar
```
public void setVar(String varName,
                   double d)
```
    Registers a variable of primitive type double in the universe.
  - setVar
```
public void setVar(String varName,
                   float f)
```
    Registers a variable of primitive type float in the universe.
  - setVar
```
public void setVar(String varName,
                   int i)
```
    Registers a variable of primitive type int in the universe.
  - setVar
```
public void setVar(String varName,
                   long l)
```
    Registers a variable of primitive type long in the universe.
  - setVar
```
public void setVar(String varName,
                   short s)
```
    Registers a variable of primitive type short in the universe.
  - getVar
```
public Object getVar(String varName)
              throws ReflectException
```
    Returns the value of a variable or field in the universe. Primitive types will be wrapped in their Java Object wrapper classes.
    
    Throws:
    
    ReflectException
  - setAccessibilityIgnored
```
public void setAccessibilityIgnored(boolean ignore)
```
    Sets whether access modifiers (protected, private, etc.) are ignored.
  - isAccessibilityIgnored
```
public boolean isAccessibilityIgnored()
```
    Gets whether access modifiers (protected, private, etc.) are ignored.
  - main
```
public static void main(String[] args)
                 throws IOException
```
    Allows exploration of a reflected universe in an interactive environment.
    
    Throws:
    
    IOException

Class ReflectedUniverse

Constructor Summary

Method Summary

Methods inherited from class java.lang.Object

Constructor Detail

ReflectedUniverse

ReflectedUniverse

ReflectedUniverse

Method Detail

isInstance

exec

setVar

setVar

setVar

setVar

setVar

setVar

setVar

setVar

setVar

getVar

setAccessibilityIgnored

isAccessibilityIgnored

main