Dépôt officiel du code source de l'ERP OpenConcerto

/*

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

 *

 * Copyright 2011 OpenConcerto, by ILM Informatique. All rights reserved.

 *

 * The contents of this file are subject to the terms of the GNU General Public License Version 3

 * only ("GPL"). You may not use this file except in compliance with the License. You can obtain a

 * copy of the License at http://www.gnu.org/licenses/gpl-3.0.html See the License for the specific

 * language governing permissions and limitations under the License.

 *

 * When distributing the software, include this License Header Notice in each file.

 */

 package org.openconcerto.utils;

import java.io.BufferedInputStream;

import java.io.File;

import java.io.FileInputStream;

import java.io.IOException;

import java.io.InputStream;

import java.util.HashMap;

import java.util.Map;

import java.util.Map.Entry;

import java.util.Properties;

public class PropertiesUtils {

    public static final Properties createFromMap(final Map<String, String> map) {

        return loadFromMap(new Properties(), map);

    }

    public static final Properties loadFromMap(final Properties res, final Map<String, String> map) {

        for (final Entry<String, String> e : map.entrySet()) {

            final String key = e.getKey();

            if (key == null)

                throw new NullPointerException("Null key : " + e);

            final String val = e.getValue();

            // Properties doesn't support nulls

            if (val != null)

                res.setProperty(key, val);

        }

        return res;

    }

    public static final Map<String, String> toMap(final Properties props) {

        final Map<String, String> res = new HashMap<>();

        for (final String key : props.stringPropertyNames()) {

            final String value = props.getProperty(key);

            assert value != null;

            res.put(key, value);

        }

        return res;

    }

    public static final Properties createFromFile(final File f) throws IOException {

        try (final InputStream stream = new BufferedInputStream(new FileInputStream(f))) {

            return create(stream);

        }

    }

    public static final Properties createFromResource(final Class<?> ctxt, final String rsrc) throws IOException {

        try (final InputStream stream = ctxt.getResourceAsStream(rsrc)) {

            return create(stream);

        }

    }

    public static final Properties create(final InputStream stream) throws IOException {

        if (stream != null) {

            final Properties res = new Properties();

            res.load(stream);

            return res;

        } else {

            return null;

        }

    }

    public static final void load(final Properties props, final Properties toLoad) {

        for (final String key : toLoad.stringPropertyNames()) {

            final String value = toLoad.getProperty(key);

            assert value != null;

            props.setProperty(key, value);

        }

    }

}