com.getperka.flatpack.util.IoObserver Maven / Gradle / Ivy
package com.getperka.flatpack.util;
/*
* #%L
* FlatPack serialization code
* %%
* Copyright (C) 2012 Perka Inc.
* %%
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
* #L%
*/
import java.io.Reader;
import java.io.Writer;
import javax.inject.Inject;
/**
* Provides decorators for readers and writers.
*/
public interface IoObserver {
/**
* A no-op implementation.
*/
public static class Null implements IoObserver {
@Override
public Reader observe(Reader reader) {
return reader;
}
@Override
public Writer observe(Writer writer) {
return writer;
}
}
/**
* Returns wrappers that will spy on the content that passes through them and record it at
* {@code debug} level.
*/
public static class Verbose implements IoObserver {
private final LogChunker chunker;
@Inject
public Verbose(LogChunker chunker) {
this.chunker = chunker;
}
@Override
public Reader observe(Reader source) {
return new VerboseReader(chunker, source);
}
@Override
public Writer observe(Writer sink) {
return new VerboseWriter(chunker, sink);
}
}
Reader observe(Reader reader);
Writer observe(Writer writer);
}