org.weakref.jmx.guice.MapMapping Maven / Gradle / Ivy

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Exporting JMX mbeans made easy

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package org.weakref.jmx.guice;

import com.google.common.reflect.TypeParameter;
import com.google.common.reflect.TypeToken;
import com.google.inject.Key;

import java.lang.reflect.Type;
import java.util.Map;
import java.util.Map.Entry;

class MapMapping
{
    private final ObjectNameFunction> objectNameFunction;
    private final Class keyClass;
    private final Class valueClass;

    MapMapping(Class keyClass, Class valueClass, ObjectNameFunction> objectNameFunction)
    {
        this.keyClass = keyClass;
        this.valueClass = valueClass;
        this.objectNameFunction = objectNameFunction;
    }

    public ObjectNameFunction> getObjectNameFunction()
    {
        return objectNameFunction;
    }

    public Key> getKey()
    {
        return (Key>) Key.get(mapOf(keyClass, valueClass));
    }

    private static  Type mapOf(Class keyClass, Class valueClass)
    {
        return new TypeToken>() {}
                .where(new TypeParameter() {}, TypeToken.of(keyClass))
                .where(new TypeParameter() {}, TypeToken.of(valueClass))
                .getType();
    }

}