/* 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.camunda.bpm.engine.impl.util;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.Closeable;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.charset.Charset;
import org.camunda.bpm.engine.ProcessEngineException;
/**
* @author Tom Baeyens
* @author Frederik Heremans
* @author Joram Barrez
*/
public class IoUtil {
public static byte[] readInputStream(InputStream inputStream, String inputStreamName) {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
byte[] buffer = new byte[16*1024];
try {
int bytesRead = inputStream.read(buffer);
while (bytesRead!=-1) {
outputStream.write(buffer, 0, bytesRead);
bytesRead = inputStream.read(buffer);
}
} catch (Exception e) {
throw new ProcessEngineException("couldn't read input stream "+inputStreamName, e);
}
return outputStream.toByteArray();
}
public static String readFileAsString(String filePath) {
byte[] buffer = new byte[(int) getFile(filePath).length()];
BufferedInputStream inputStream = null;
try {
inputStream = new BufferedInputStream(new FileInputStream(getFile(filePath)));
inputStream.read(buffer);
} catch(Exception e) {
throw new ProcessEngineException("Couldn't read file " + filePath + ": " + e.getMessage());
} finally {
IoUtil.closeSilently(inputStream);
}
return new String(buffer, Charset.forName("UTF-8"));
}
public static File getFile(String filePath) {
URL url = IoUtil.class.getClassLoader().getResource(filePath);
try {
return new File(url.toURI());
} catch (Exception e) {
throw new ProcessEngineException("Couldn't get file " + filePath + ": " + e.getMessage());
}
}
public static void writeStringToFile(String content, String filePath) {
BufferedOutputStream outputStream = null;
try {
outputStream = new BufferedOutputStream(new FileOutputStream(getFile(filePath)));
outputStream.write(content.getBytes());
outputStream.flush();
} catch(Exception e) {
throw new ProcessEngineException("Couldn't write file " + filePath, e);
} finally {
IoUtil.closeSilently(outputStream);
}
}
/**
* Closes the given stream. The same as calling {@link Closeable#close()}, but
* errors while closing are silently ignored.
*/
public static void closeSilently(Closeable closeable) {
try {
if(closeable != null) {
closeable.close();
}
} catch(IOException ignore) {
// Exception is silently ignored
}
}
}