DiffHandler (API 0.9.21 API)

All Known Implementing Classes:

AbstractDiffHandler, DifferenceAccumulatingHandler, DOMDiffHandler, StreamDiffHandler
```
public interface DiffHandler
```
An interface for classes which wish to receive information about differences in class files between two different jar file version to implement.

Author:

Antony Riley

Method Summary

Methods
Modifier and Type	Method and Description
`void`	`classAdded(ClassInfo classinfo)` Notification that a class was added.
`void`	`classChanged(ClassInfo oldClassinfo, ClassInfo newClassinfo)` The current class has changed.
`void`	`classRemoved(ClassInfo classinfo)` Notification that a class was removed.
`void`	`contains(ClassInfo info)` Add a contained class.
`void`	`endAdded()` End of list of removed classes.
`void`	`endChanged()` End of class changes.
`void`	`endClassChanged()` End of changes for the current class.
`void`	`endDiff()` End of the diff.
`void`	`endNewContents()` End the list of new contents.
`void`	`endOldContents()` End the list of old contents.
`void`	`endRemoved()` End of list of removed classes.
`void`	`fieldAdded(FieldInfo fieldinfo)` The field was added for the current class that has changed.
`void`	`fieldChanged(FieldInfo oldFieldinfo, FieldInfo newFieldinfo)` A field on the current class has changed.
`void`	`fieldRemoved(FieldInfo fieldinfo)` The field was removed for the current class that has changed.
`void`	`methodAdded(MethodInfo methodinfo)` The method was added for the current class that has changed.
`void`	`methodChanged(MethodInfo oldMethodInfo, MethodInfo newMethodInfo)` A method on the current class has changed.
`void`	`methodRemoved(MethodInfo methodinfo)` The method was removed for the current class that has changed.
`void`	`startAdded()` Start of list of added classes.
`void`	`startChanged()` Start list of changed classes.
`void`	`startClassChanged(String string)` Start information about class changes for the classname passed.
`void`	`startDiff(String a, String b)` Start a diff between two versions, where string a is the old version and string b is the new version.
`void`	`startNewContents()` Start the list of new contents.
`void`	`startOldContents()` Start the list of old contents.
`void`	`startRemoved()` Start the list of removed classes.

- Method Detail
  - startDiff
```
void startDiff(String a,
             String b)
               throws DiffException
```
    Start a diff between two versions, where string a is the old version and string b is the new version.
    
    Parameters:
    a - the name of the old version
    b - the name of the new version
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - startOldContents
```
void startOldContents()
                      throws DiffException
```
    Start the list of old contents.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - startNewContents
```
void startNewContents()
                      throws DiffException
```
    Start the list of new contents.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - contains
```
void contains(ClassInfo info)
              throws DiffException
```
    Add a contained class.
    
    Parameters:
    info - information about a class
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endOldContents
```
void endOldContents()
                    throws DiffException
```
    End the list of old contents.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endNewContents
```
void endNewContents()
                    throws DiffException
```
    End the list of new contents.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - startRemoved
```
void startRemoved()
                  throws DiffException
```
    Start the list of removed classes.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - classRemoved
```
void classRemoved(ClassInfo classinfo)
                  throws DiffException
```
    Notification that a class was removed.
    
    Parameters:
    classinfo - information about the class that has been removed.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endRemoved
```
void endRemoved()
                throws DiffException
```
    End of list of removed classes.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - startAdded
```
void startAdded()
                throws DiffException
```
    Start of list of added classes.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - classAdded
```
void classAdded(ClassInfo classinfo)
                throws DiffException
```
    Notification that a class was added.
    
    Parameters:
    classinfo - information about the class that has been removed.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endAdded
```
void endAdded()
              throws DiffException
```
    End of list of removed classes.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - startChanged
```
void startChanged()
                  throws DiffException
```
    Start list of changed classes.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - startClassChanged
```
void startClassChanged(String string)
                       throws DiffException
```
    Start information about class changes for the classname passed.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - fieldRemoved
```
void fieldRemoved(FieldInfo fieldinfo)
                  throws DiffException
```
    The field was removed for the current class that has changed.
    
    Parameters:
    fieldinfo - Information about the field removed.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - methodRemoved
```
void methodRemoved(MethodInfo methodinfo)
                   throws DiffException
```
    The method was removed for the current class that has changed.
    
    Parameters:
    methodinfo - Information about the method removed.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - fieldAdded
```
void fieldAdded(FieldInfo fieldinfo)
                throws DiffException
```
    The field was added for the current class that has changed.
    
    Parameters:
    fieldinfo - Information about the field added.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - methodAdded
```
void methodAdded(MethodInfo methodinfo)
                 throws DiffException
```
    The method was added for the current class that has changed.
    
    Parameters:
    methodinfo - Information about the method added.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - classChanged
```
void classChanged(ClassInfo oldClassinfo,
                ClassInfo newClassinfo)
                  throws DiffException
```
    The current class has changed. This is called when a class's interfaces or superclass or access flags have changed.
    
    Parameters:
    oldClassinfo - Information about the old class.
    newClassinfo - Information about the new class.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - fieldChanged
```
void fieldChanged(FieldInfo oldFieldinfo,
                FieldInfo newFieldinfo)
                  throws DiffException
```
    A field on the current class has changed.
    
    Parameters:
    oldFieldinfo - Information about the old field.
    newFieldinfo - Information about the new field.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - methodChanged
```
void methodChanged(MethodInfo oldMethodInfo,
                 MethodInfo newMethodInfo)
                   throws DiffException
```
    A method on the current class has changed.
    
    Parameters:
    oldMethodInfo - Information about the old method.
    newMethodInfo - Information about the new method.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endClassChanged
```
void endClassChanged()
                     throws DiffException
```
    End of changes for the current class.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endChanged
```
void endChanged()
                throws DiffException
```
    End of class changes.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException
  - endDiff
```
void endDiff()
             throws DiffException
```
    End of the diff.
    
    Throws:
    
    DiffException - when there is an underlying exception, e.g. writing to a file caused an IOException

Interface DiffHandler

Method Summary

Method Detail

startDiff

startOldContents

startNewContents

contains

endOldContents

endNewContents

startRemoved

classRemoved

endRemoved

startAdded

classAdded

endAdded

startChanged

startClassChanged

fieldRemoved

methodRemoved

fieldAdded

methodAdded

classChanged

fieldChanged

methodChanged

endClassChanged

endChanged

endDiff