package com.atlassian.activeobjects.osgi;

import com.google.common.base.Function;
import org.osgi.framework.Bundle;

import static com.google.common.base.Preconditions.checkNotNull;

class LoadClassFromBundleFunction implements Function<String, Class> {
    private final Bundle bundle;

    LoadClassFromBundleFunction(Bundle bundle) {
        this.bundle = checkNotNull(bundle);
    }

    @Override
    public Class<?> apply(String className) {
        try {
            return bundle.loadClass(className);
        } catch (ClassNotFoundException e) {
            throw new IllegalStateException("How did this happen? We're loading class '" + className + "'from the " + bundle, e);
        }
    }
}