com.yoncabt.abys.core.util.Util.java Source code

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Here is the source code for com.yoncabt.abys.core.util.Util.java

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package com.yoncabt.abys.core.util;

import java.io.File;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.commons.lang.StringUtils;

/**
 *
 * @author myururdurmaz
 */
public class Util {
    private static final boolean test = new File("/tmp/ebt-test-mode").exists();

    public static boolean isTest() {
        return test;
    }

    public static List<Integer> parseSequence(String sequence, int maxCount) {
        if (StringUtils.isBlank(sequence)) {
            return Collections.EMPTY_LIST;
        }
        List<Integer> ret = new ArrayList<>();
        for (String item : sequence.split(",")) {
            if (item.contains("-")) {
                String[] split = item.split("-");
                int start = Integer.parseInt(split[0]);
                int end = Integer.parseInt(split[1]);
                for (int i = start; start < end && i <= end; i++) {
                    ret.add(i);
                    if (ret.size() > maxCount) {
                        throw new IllegalArgumentException(sequence);
                    }
                }
            } else {
                ret.add(Integer.parseInt(item));
                if (ret.size() > maxCount) {
                    throw new IllegalArgumentException(sequence);
                }
            }
        }
        return ret;
    }

    public static <T> T nvl(T v1, T v2) {
        if (v1 == null) {
            return v2;
        }
        return v1;
    }

    public static String join(String seperator, String... args) {
        StringBuilder sb = new StringBuilder();
        if (args.length > 0) {
            sb.append(nvl(args[0], ""));
        }
        for (int i = 1; i < args.length; i++) {
            sb.append(seperator).append(nvl(args[i], ""));
        }
        return sb.toString();
    }
}