/*
 *  Copyright 2010-present Stephen Colebourne
 *
 *  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.
 */
/*
 * Copied from Guava and altered. Original copyright:
 * 
 * Copyright (C) 2012 The Guava 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
 *
 * 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 org.joda.convert;

import java.lang.reflect.ParameterizedType;
import java.lang.reflect.Type;

/**
 * Captures the actual type of {@code T}.
 */
abstract class TypeCapture<T> {

    /** Returns the captured type. */
    final Type capture() {
        Type superclass = getClass().getGenericSuperclass();
        Types.checkArgument(superclass instanceof ParameterizedType, "%s isn't parameterized", superclass);
        return ((ParameterizedType) superclass).getActualTypeArguments()[0];
    }
}
