com.github.fge.msgsimple.source.MapMessageSource Maven / Gradle / Ivy

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package com.github.fge.msgsimple.source;

import java.util.HashMap;
import java.util.Map;

public final class MapMessageSource
    implements MessageSource
{
    private final Map messages;

    public MapMessageSource(final Map messages)
    {
        checkMap(messages);
        this.messages = new HashMap(messages);
    }

    @Override
    public String getMessage(final String key)
    {
        return messages.get(key);
    }

    private static void checkMap(final Map map)
    {
        for (final Map.Entry entry: map.entrySet()) {
            if (entry.getKey() == null)
                throw new NullPointerException("null keys not allowed in map");
            if (entry.getValue() == null)
                throw new NullPointerException("null values not allowed in map");
        }
    }
}