package org.jdbi.v3;

import java.util.function.Supplier;

class LazyHandle implements Supplier<Handle>, AutoCloseable {
    private final DBI dbi;

    private volatile Handle handle;
    private volatile boolean closed = false;

    public LazyHandle(DBI dbi) {
        this.dbi = dbi;
    }

    public Handle get() {
        if (handle == null) {
            initHandle();
        }
        return handle;
    }

    private synchronized void initHandle() {
        if (handle == null) {
            if (closed) {
                throw new IllegalStateException("Handle is closed");
            }
            handle = dbi.open();
        }
    }

    public synchronized void close() {
        closed = true;
        if (handle != null) {
            handle.close();
        }
    }
}

@@ -1,8 +1,566 @@
+/*%0A * Licensed under the Apache License, Version 2.0 (the %22License%22);%0A * you may not use this file except in compliance with the License.%0A * You may obtain a copy of the License at%0A *%0A * http://www.apache.org/licenses/LICENSE-2.0%0A *%0A * Unless required by applicable law or agreed to in writing, software%0A * distributed under the License is distributed on an %22AS IS%22 BASIS,%0A * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.%0A * See the License for the specific language governing permissions and%0A * limitations under the License.%0A */%0A
 package 

Add missing license header