RuntimeModel

All Known Implementing Classes:

Runtime, RuntimeModel, RuntimeModel, RuntimeModel
```
public interface RuntimeModel
```
A RuntimeModel is used by the XL run-time system as an interface to the concrete relational data source in use. It corresponds to a compile-time model which was used at compile-time: The invocation of CompiletimeModel.getRuntimeName() returns a name, which is passed to RuntimeModelFactory.modelForName(java.lang.String, java.lang.ClassLoader) in order to obtain the corresponding RuntimeModel.
This interface contains methods related to unwrapping of values, for determining if a value represents a node value, and for the retrieval of a Graph associated with this model and the current thread. Roughly speaking, a RuntimeModel provides a set of operations, a Graph provides the data.
A comprehensive specification of the behaviour of RuntimeModel is given by the specification of the XL programming language.

Author:

Ole Kniemeyer

Method Summary

Methods
Modifier and Type	Method and Description
`Graph`	`currentGraph()` Returns the graph that shall be used in the context of the current thread.
`void`	`initialize(java.lang.String params)` Initializes this model.
`boolean`	`isNode(java.lang.Object value)` Determines if `value` represents a valid node for this run-time model.
`boolean`	`isWrapperFor(java.lang.Object object, Type<?> type)` Tests if the object is a wrapper for values of the given type.
`boolean`	`unwrapBoolean(java.lang.Object wrapper)` Extracts the boolean value of a wrapper.
`byte`	`unwrapByte(java.lang.Object wrapper)` Extracts the byte value of a wrapper.
`char`	`unwrapChar(java.lang.Object wrapper)` Extracts the char value of a wrapper.
`double`	`unwrapDouble(java.lang.Object wrapper)` Extracts the double value of a wrapper.
`float`	`unwrapFloat(java.lang.Object wrapper)` Extracts the float value of a wrapper.
`int`	`unwrapInt(java.lang.Object wrapper)` Extracts the int value of a wrapper.
`long`	`unwrapLong(java.lang.Object wrapper)` Extracts the long value of a wrapper.
`java.lang.Object`	`unwrapObject(java.lang.Object wrapper)` Extracts the Object value of a wrapper.
`short`	`unwrapShort(java.lang.Object wrapper)` Extracts the short value of a wrapper.

- Method Detail
  - currentGraph
```
Graph currentGraph()
```
    Returns the graph that shall be used in the context of the current thread. This is needed by graph-related XL statements which do not explicitly specify the graph to use.
    
    Returns:
    the current graph for this model
  - initialize
```
void initialize(java.lang.String params)
```
    Initializes this model. This method is invoked by RuntimeModelFactory.modelForName(java.lang.String, java.lang.ClassLoader) after a new RuntimeModel instance has been created. The format of params depends on implementations of RuntimeModel.
    
    Parameters:
    params - initialization parameters, possibly null
  - isNode
```
boolean isNode(java.lang.Object value)
```
    Determines if value represents a valid node for this run-time model.
    
    Parameters:
    value - the value to be tested
    
    Returns:
    true iff the value represents a node
  - isWrapperFor
```
boolean isWrapperFor(java.lang.Object object,
                   Type<?> type)
```
    Tests if the object is a wrapper for values of the given type.
    
    Parameters:
    object - the potential wrapper to be tested
    type - the value type
    
    Returns:
    true iff object is a wrapper for values of type type
  - unwrapBoolean
```
boolean unwrapBoolean(java.lang.Object wrapper)
```
    Extracts the boolean value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapByte
```
byte unwrapByte(java.lang.Object wrapper)
```
    Extracts the byte value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapChar
```
char unwrapChar(java.lang.Object wrapper)
```
    Extracts the char value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapDouble
```
double unwrapDouble(java.lang.Object wrapper)
```
    Extracts the double value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapFloat
```
float unwrapFloat(java.lang.Object wrapper)
```
    Extracts the float value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapInt
```
int unwrapInt(java.lang.Object wrapper)
```
    Extracts the int value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapLong
```
long unwrapLong(java.lang.Object wrapper)
```
    Extracts the long value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapObject
```
java.lang.Object unwrapObject(java.lang.Object wrapper)
```
    Extracts the Object value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper
  - unwrapShort
```
short unwrapShort(java.lang.Object wrapper)
```
    Extracts the short value of a wrapper.
    
    Parameters:
    wrapper - the wrapper
    
    Returns:
    the wrapped value of the wrapper

Interface RuntimeModel

Method Summary

Method Detail

currentGraph

initialize

isNode

isWrapperFor

unwrapBoolean

unwrapByte

unwrapChar

unwrapDouble

unwrapFloat

unwrapInt

unwrapLong

unwrapObject

unwrapShort