com.metaeffekt.artifact.analysis.utils.PropertyUtils Maven / Gradle / Ivy

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/*
 * Copyright 2021-2024 the original author or authors.
 *
 * 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 com.metaeffekt.artifact.analysis.utils;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.*;
import java.util.List;
import java.util.Properties;

public class PropertyUtils {

    private static final Logger LOG = LoggerFactory.getLogger(PropertyUtils.class);

    public static Properties loadProperties(File file) {
        Properties properties = new Properties();
        if (file.exists()) {
            try (FileInputStream in = new FileInputStream(file)) {
                properties.load(in);
            } catch (IOException e) {
                LOG.error("Cannot load '{}'.", file, e);
            }
        }
        return properties;
    }

    public static void saveProperties(File file, Properties p) {
        file.getParentFile().mkdirs();
        try (FileOutputStream out = new FileOutputStream(file)) {
            p.store(out, null);
        } catch (FileNotFoundException e) {
            LOG.error("Cannot save properties to '{}'.", file, e);
        } catch (IOException e) {
            LOG.error("Cannot save properties to '{}'.", file, e);
        }

        // eliminate first line if possible
        try {
            List strings = FileUtils.readLines(file, FileUtils.ENCODING_UTF_8);
            if (strings != null && strings.size() > 0 && strings.get(0).startsWith("#")) {
                strings.remove(0);
            }
            FileUtils.writeLines(file, FileUtils.ENCODING_UTF_8, strings);
        } catch (IOException e) {
        }
    }

}