de.micromata.genome.gwiki.utils.PropUtils.java Source code

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Here is the source code for de.micromata.genome.gwiki.utils.PropUtils.java

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//
// Copyright (C) 2010-2016 Roger Rene Kommer & Micromata GmbH
//
// 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 de.micromata.genome.gwiki.utils;

import java.io.IOException;
import java.util.Map;
import java.util.Properties;

import org.apache.commons.io.IOUtils;
import org.apache.commons.io.output.ByteArrayOutputStream;
import org.apache.commons.lang3.StringUtils;

import de.micromata.genome.util.collections.OrderedProperties;
import de.micromata.genome.util.runtime.RuntimeIOException;

/**
 * utils to deal with properties.
 * 
 * @author Roger Rene Kommer (r.kommer@micromata.de)
 * 
 */
public class PropUtils {
    /**
     * Replaces ${} expressions.
     * 
     * @param text
     * @param keyValues key and values at even and odd position.
     * @return
     */
    public static String eval(String text, String... keyValues) {
        for (int i = 0; i < keyValues.length; ++i) {
            String search = "${" + keyValues[i] + "}";
            if (keyValues.length <= i + 1) {
                return text;
            }
            String repl = keyValues[++i];
            text = StringUtils.replace(text, search, repl);
        }
        return text;
    }

    public static final String PROPS_ENCODING = "ISO-8859-1";

    public static OrderedProperties toProperties(String text) {
        OrderedProperties props = new OrderedProperties();
        if (StringUtils.isEmpty(text) == true) {
            return props;
        }
        try {
            props.load(IOUtils.toInputStream(text, PROPS_ENCODING));
            return props;
        } catch (IOException ex) {
            throw new RuntimeIOException("Failed to parse Property file: " + ex.getMessage(), ex);
        }
    }

    public static String fromProperties(Properties props) {
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        try {
            props.store(bout, "");
            return new String(bout.toByteArray(), PROPS_ENCODING);
        } catch (Exception ex) {
            throw new RuntimeException(ex);
        }
    }

    public static String fromProperties(Map<String, String> map) {
        Object om = map;
        if (om instanceof Properties) {
            return fromProperties((Properties) om);
        }
        Properties props = new Properties();
        props.putAll(map);
        return fromProperties(props);
    }
}