io.gravitee.common.utils.PropertiesUtils.java Source code

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Here is the source code for io.gravitee.common.utils.PropertiesUtils.java

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/**
 * Copyright (C) 2015 The Gravitee team (http://gravitee.io)
 *
 * 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 io.gravitee.common.utils;

import com.google.common.base.Strings;

import java.util.Properties;

/**
 * @author Azize Elamrani (azize dot elamrani at gmail dot com)
 */
public class PropertiesUtils {

    private PropertiesUtils() {
    }

    public static String getProperty(final Properties properties, final String propertyName) {
        return (String) getProperty(properties, propertyName, false);
    }

    public static Integer getPropertyAsInteger(final Properties properties, final String propertyName) {
        return (Integer) getProperty(properties, propertyName, true);
    }

    public static Object getProperty(final Properties properties, final String propertyName,
            final boolean isNumber) {
        final String propertyValue = properties.getProperty(propertyName);
        if (Strings.isNullOrEmpty(propertyValue)) {
            throw new IllegalStateException("Missing property configuration:" + propertyName);
        }
        try {
            if (isNumber) {
                return Integer.parseInt(propertyValue);
            }
            return propertyValue;
        } catch (final NumberFormatException e) {
            throw new IllegalArgumentException("The property must be a valid number:" + propertyName, e);
        }
    }
}