de.unkrig.commons.file.contentstransformation

Class SelectiveContentsTransformer

java.lang.Object

de.unkrig.commons.file.contentstransformation.SelectiveContentsTransformer

All Implemented Interfaces:

ContentsTransformer

public class SelectiveContentsTransformer
extends Object
implements ContentsTransformer

A ContentsTransformer that delegates contents transformation to one of two delegates, depending on whether the path argument matches a string Predicate or not.

Constructor Summary

Constructors

Constructor and Description
SelectiveContentsTransformer(Predicate<? super String> pathPredicate, ContentsTransformer transformer, ContentsTransformer delegate) If the pathPredicate does not match the node's path, then the delegate is called.

Method Summary

Modifier and Type	Method and Description
static ContentsTransformer	create(Predicate<? super String> pathPredicate, ContentsTransformer transformer, ContentsTransformer delegate) Equivalent with SelectiveContentsTransformer(Predicate, ContentsTransformer, ContentsTransformer), but conducts certain optimizations.
String	toString()
void	transform(String path, InputStream is, OutputStream os) If the pathPredicate does not match the path, then the delegate is called with arguments is and os.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

SelectiveContentsTransformer

public SelectiveContentsTransformer(Predicate<? super String> pathPredicate,
                                    ContentsTransformer transformer,
                                    ContentsTransformer delegate)

If the pathPredicate does not match the node's path, then the delegate is called. Otherwise the delegate is called, and its output is piped through the transformer.

Notice that the preformance is particularly good if the transformer and/or the delegate is ContentsTransformations.COPY.

Method Detail

create

public static ContentsTransformer create(Predicate<? super String> pathPredicate,
                                         ContentsTransformer transformer,
                                         ContentsTransformer delegate)

Equivalent with SelectiveContentsTransformer(Predicate, ContentsTransformer, ContentsTransformer), but conducts certain optimizations.

• When pathPredicate is PredicateUtil.always()
• When pathPredicate is PredicateUtil.never()
• When transformer is ContentsTransformations.COPY
• When delegate is ContentsTransformations.COPY

transform

public void transform(String path,
                      InputStream is,
                      OutputStream os)
               throws IOException

If the pathPredicate does not match the path, then the delegate is called with arguments is and os. Otherwise the delegate is called with argument is, and its output is piped through the transformer before it is written to os.

Specified by:

transform in interface ContentsTransformer

Parameters:

path - Designates the contents that is transformed

Throws:

IOException

toString

public String toString()

Overrides:

toString in class Object