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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.netbeans.modules.testng;

import org.netbeans.modules.testng.spi.TestConfig;
import org.openide.filesystems.FileObject;

public abstract class TestConfigAccessor {

    protected TestConfigAccessor() {
    }

    private static volatile TestConfigAccessor accessor;

    public static void setDefault(TestConfigAccessor accessor) {
        if (TestConfigAccessor.accessor != null) {
            throw new IllegalStateException("Already initialized accessor");
        }
        TestConfigAccessor.accessor = accessor;
    }

    public static TestConfigAccessor getDefault() {
        if (accessor != null) {
            return accessor;
        }
        // invokes static initializer of TestConfig.class
        // that will assign value to the DEFAULT field above
        Class c = TestConfig.class;
        try {
            Class.forName(c.getName(), true, c.getClassLoader());
        } catch (ClassNotFoundException ex) {
            assert false : ex;
        }
        assert accessor != null : "The accessor field must be initialized";
        return accessor;
    }

    public abstract TestConfig createTestConfig(FileObject test, boolean rerun, String pkgName, String className, String methodName);
}