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java.lang.Objectorg.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(StringBuilder s,
String EOL)
Converts this delta into its RCS style string representation. |
void |
toString(StringBuilder 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(StringBuilder s)
toString in class ToStrings - a StringBuffer to which the string representation will be
appended.
public abstract void toRCSString(StringBuilder 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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