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java.lang.Object org.apache.wicket.util.diff.ToString org.apache.wicket.util.diff.Delta
public abstract class Delta
Holds a "delta" difference between to revisions of a text.
Diff
,
Chunk
,
modifications
27 Apr 2003 bwm
Added getOriginal() and getRevised() accessor methods Added visitor pattern accept() method
Field Summary | |
---|---|
protected Chunk |
original
|
protected Chunk |
revised
|
Constructor Summary | |
---|---|
protected |
Delta()
Creates an uninitialized delta. |
protected |
Delta(Chunk orig,
Chunk rev)
Creates a delta object with the given chunks from the original and revised texts. |
Method Summary | |
---|---|
abstract void |
accept(RevisionVisitor visitor)
Accepts a visitor. |
abstract void |
applyTo(List<Object> target)
Applies this delta as a patch to the given text. |
Chunk |
getOriginal()
Accessor method to return the chunk representing the original sequence of items |
Chunk |
getRevised()
Accessor method to return the chunk representing the updated sequence of items. |
protected void |
init(Chunk orig,
Chunk rev)
Initializes the delta with the given chunks from the original and revised texts. |
static Delta |
newDelta(Chunk orig,
Chunk rev)
Returns a Delta that corresponds to the given chunks in the original and revised text respectively. |
void |
patch(List<Object> target)
Applies this delta as a patch to the given text. |
String |
toRCSString(String EOL)
Converts this delta into its RCS style string representation. |
abstract void |
toRCSString(StringBuffer s,
String EOL)
Converts this delta into its RCS style string representation. |
void |
toString(StringBuffer s)
Converts this delta into its Unix diff style string representation. |
abstract void |
verify(List<Object> target)
Verifies that this delta can be used to patch the given text. |
Methods inherited from class org.apache.wicket.util.diff.ToString |
---|
arrayToString, arrayToString, stringToArray, toString |
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
---|
protected Chunk original
protected Chunk revised
Constructor Detail |
---|
protected Delta()
protected Delta(Chunk orig, Chunk rev)
orig
- rev
- Method Detail |
---|
public static Delta newDelta(Chunk orig, Chunk rev)
orig
- the chunk in the original text.rev
- the chunk in the revised text.
protected void init(Chunk orig, Chunk rev)
orig
- rev
- public abstract void verify(List<Object> target) throws PatchFailedException
target
- the text to patch.
PatchFailedException
- if the patch cannot be applied.public final void patch(List<Object> target) throws PatchFailedException
target
- the text to patch.
PatchFailedException
- if the patch cannot be applied.public abstract void applyTo(List<Object> target)
target
- the text to patch.
PatchFailedException
- if the patch cannot be applied.public void toString(StringBuffer s)
toString
in class ToString
s
- a StringBuffer
to which the string representation will be
appended.public abstract void toRCSString(StringBuffer s, String EOL)
s
- a StringBuffer
to which the string representation will be
appended.EOL
- the string to use as line separator.public String toRCSString(String EOL)
EOL
- the string to use as line separator.
public Chunk getOriginal()
public Chunk getRevised()
public abstract void accept(RevisionVisitor visitor)
See the Visitor pattern in "Design Patterns" by the GOF4.
visitor
- The visitor.
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