/*
* Copyright 2009-2010 junithelper.org.
*
* 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.
*/
package org.junithelper.core.file;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.nio.charset.Charset;
import org.apache.commons.io.FileUtils;
import org.junithelper.core.util.Assertion;
import org.junithelper.core.util.IOUtil;
import org.mozilla.universalchardet.UniversalDetector;
class FileReaderCommonsIOImpl implements FileReader {
@Override
public InputStream getResourceAsStream(String name) {
Assertion.on("name").mustNotBeNull(name);
return FileReaderCommonsIOImpl.class.getClassLoader().getResourceAsStream(name);
}
@Override
public String readAsString(File file) throws IOException {
String readResult = FileUtils.readFileToString(file, getDetectedEncoding(file));
return readResult;
}
@Override
public String getDetectedEncoding(File file) {
InputStream is = null;
String encoding = null;
try {
is = new FileInputStream(file);
UniversalDetector detector = new UniversalDetector(null);
byte[] buf = new byte[4096];
int nread;
while ((nread = is.read(buf)) > 0 && !detector.isDone()) {
detector.handleData(buf, 0, nread);
}
detector.dataEnd();
encoding = detector.getDetectedCharset();
} catch (IOException e) {
// nothing to do
} finally {
IOUtil.close(is);
if (encoding == null) {
return Charset.defaultCharset().name();
}
}
return encoding;
}
}