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/*
* Copyright 2017 BOCO Corporation. CMCC Technologies Co., Ltd
*
* 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.emsdriver.commons.utils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Locale;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public final class VarExprParser {
private static Log log = LogFactory.getFactory().getInstance(VarExprParser.class);
private static Pattern varPattern = Pattern.compile("(\\$\\{([^\\}]+)\\})",
Pattern.CASE_INSENSITIVE);
public static final String replaceVar(String str, long scanStartTime, long scanStopTime) {
if (str.indexOf("${") == -1)
return str;
// support original system variable
str = str.replace("${s_year}", "${SCAN_START_TIME,yyyy}");
str = str.replace("${s_mon}", "${SCAN_START_TIME,MM}");
str = str.replace("${s_day}", "${SCAN_START_TIME,dd}");
str = str.replace("${s_hour}", "${SCAN_START_TIME,HH}");
str = str.replace("${s_min}", "${SCAN_START_TIME,mm}");
str = str.replace("${e_year}", "${SCAN_STOP_TIME,yyyy}");
str = str.replace("${e_mon}", "${SCAN_STOP_TIME,MM}");
str = str.replace("${e_day}", "${SCAN_STOP_TIME,dd}");
str = str.replace("${e_hour}", "${SCAN_STOP_TIME,HH}");
str = str.replace("${e_min}", "${SCAN_STOP_TIME,mm}");
String expr;
String varName;
String value ;
Matcher matcher = varPattern.matcher(str);
while (matcher.find()) {
value = null;
expr = matcher.group(1);
varName = matcher.group(2);
if (expr.indexOf("${SCAN_START_TIME") != -1) {
value = getTime(scanStartTime, varName, "yyyy-MM-dd HH:mm:ss");
} else if (expr.indexOf("${SCAN_STOP_TIME") != -1) {
value = getTime(scanStopTime, varName, "yyyy-MM-dd HH:mm:ss");
}
if (value == null) {
log.warn(" expr [" + str + "] var["
+ expr + "]is fail");
continue;
}
str = str.replace(expr, value);
}
return str;
}
private static String getTime(long time, String value, String defaultParam) {
String timeStr = null;
String formatStr = null;
String increaseTime = null;
if (value.indexOf(",") == -1) {
formatStr = defaultParam;
timeStr = value;
} else {
timeStr = value.split(",")[0];
formatStr = value.split(",")[1];
}
if (timeStr.indexOf("+") == -1 && timeStr.indexOf("-") == -1) {
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formatStr, Locale.ENGLISH);
return simpleDateFormat.format(time);
} else {
if (timeStr.indexOf("+") != -1) {
increaseTime = timeStr.substring(timeStr.indexOf("+") + 1, timeStr.length() - 1);
}
if (timeStr.indexOf("-") != -1) {
increaseTime = timeStr.substring(timeStr.indexOf("-"), timeStr.length() - 1);
}
if (timeStr.toLowerCase().endsWith("h")) {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(time);
cal.add(Calendar.HOUR, Integer.parseInt(increaseTime));
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formatStr, Locale.ENGLISH);
return simpleDateFormat.format(cal.getTimeInMillis());
} else if (timeStr.toLowerCase().endsWith("m")) {
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(time);
cal.add(Calendar.MINUTE, Integer.parseInt(increaseTime));
SimpleDateFormat simpleDateFormat = new SimpleDateFormat(formatStr, Locale.ENGLISH);
return simpleDateFormat.format(cal.getTimeInMillis());
}
}
return null;
}
/**
* Support two variable substitutions
* @param result
* @param scanStartTime
* @param scanStopTime
* @return
*/
public static String replaceTimeVar(String result,String scanStartTime, String scanStopTime) {
boolean isReplace = false;
if (result.indexOf("${SCAN_ST") != -1) {
isReplace = true;
}
if (isReplace) {
if (result.indexOf("${SCAN_START_TIME}") != -1) {
result = StringUtils.replace(result, "${SCAN_START_TIME}", scanStartTime);
}
if (result.indexOf("${SCAN_STOP_TIME") != -1) {
result = StringUtils.replace(result, "${SCAN_STOP_TIME}", scanStopTime);
}
}
return result;
}
}
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