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/*
* Copyright 2016-2017, Nokia Corporation
*
* 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.onap.vfc.nfvo.driver.vnfm.svnfm.common.util;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public final class CommonUtil {
private static final Logger logger = LoggerFactory.getLogger(CommonUtil.class);
public static String getJsonStrFromFile(String filePath) throws IOException {
InputStream ins = null;
BufferedInputStream bins = null;
String fileContent = "";
String fileName = getAppRoot() + filePath;
try {
ins = new FileInputStream(fileName);
bins = new BufferedInputStream(ins);
byte[] contentByte = new byte[ins.available()];
int num = bins.read(contentByte);
if(num > 0) {
fileContent = new String(contentByte);
}
} catch(FileNotFoundException e) {
logger.error(fileName + "is not found!", e);
} finally {
if(ins != null) {
ins.close();
}
if(bins != null) {
bins.close();
}
}
return fileContent;
}
private static String getAppRoot() {
String appRoot = System.getProperty("catalina.base");
if(appRoot != null) {
appRoot = getCanonicalPath(appRoot);
}
return appRoot;
}
private static String getCanonicalPath(final String inPath) {
String path = null;
try {
if(inPath != null) {
final File file = new File(inPath);
path = file.getCanonicalPath();
}
} catch(final IOException e) {
logger.error("file.getCanonicalPath() IOException:", e);
}
return path;
}
}
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