/*
 * Copyright 2002-2019 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
 *
 *      https://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.taobao.arthas.core.env;

import java.util.Map;
import java.util.Properties;

/**
 * {@link PropertySource} implementation that extracts properties from a
 * {@link java.util.Properties} object.
 *
 * <p>
 * Note that because a {@code Properties} object is technically an
 * {@code <Object, Object>} {@link java.util.Hashtable Hashtable}, one may
 * contain non-{@code String} keys or values. This implementation, however is
 * restricted to accessing only {@code String}-based keys and values, in the
 * same fashion as {@link Properties#getProperty} and
 * {@link Properties#setProperty}.
 *
 * @author Chris Beams
 * @author Juergen Hoeller
 * @since 3.1
 */
public class PropertiesPropertySource extends MapPropertySource {

    @SuppressWarnings({ "rawtypes", "unchecked" })
    public PropertiesPropertySource(String name, Properties source) {
        super(name, (Map) source);
    }

    protected PropertiesPropertySource(String name, Map<String, Object> source) {
        super(name, source);
    }

    @Override
    public String[] getPropertyNames() {
        synchronized (this.source) {
            return super.getPropertyNames();
        }
    }

}
