Re: Copyright in JDK1.5

Henri Yandell Thu, 20 Jan 2005 22:08:44 -0800


It wouldn't be available at source time would it?

If I goto CVS, grab the TestOnly.java file and copy it, I'll have never seen a copyright notice.

Hen

On Fri, 21 Jan 2005, Hanson Char wrote:

Oops, the "TestOnly" annotation can be ommited.  Otherwise, here is
the definition:

@CopyRightApache
@Documented
@Inherited
@Retention(RetentionPolicy.RUNTIME)
public @interface TestOnly {
   String value() default "";
}

On Fri, 21 Jan 2005 16:23:03 +1100, Hanson Char <[EMAIL PROTECTED]> wrote:

Conceivably, this makes it unnecessary to copy and paste the Apache
Copyright at the top of every java source files.

Instead, simply annotate:

@CopyRightApache
public class Foo {...}

This copyright info then becomes available both at source, class and
runtime level, plus the compiler will verify it for you in case of
typo.

On Fri, 21 Jan 2005 16:17:43 +1100, Hanson Char <[EMAIL PROTECTED]> wrote:

An idea on preserving copyright on objects via jdk1.5 annotation and enum.

1)  Creates a enum CopyRightType with one value APACHE, which has the
toString method to return the Apache software license.
2) Creates an annotation CopyRightApache that has a value that returns
the above CopyRightType, with the default set to CopyRightType.APACHE.
3) Annotates every class with @CopyRightApache.

Now the copyright of any object can be accessed in the JVM during runtime by:

  object.getClass().getAnnotation(CopyRightApache.class).toString()

Sample code:

// Enum Definition for the Apache Copyright
@CopyRightApache
public enum CopyRightType {
    APACHE {
        @Override public String toString() {
            return "\n"
            + "/*
========================================================================\n"
            + " * Copyright 2004 The Apache Software Foundation\n"
            + " *\n"
            + " * Licensed under the Apache License, Version 2.0 (the
\"License\");\n"
            + " * you may not use this file except in compliance with
the License.\n"
            + " * You may obtain a copy of the License at\n"
            + " *\n"
            + " *     http://www.apache.org/licenses/LICENSE-2.0\n";
            + " *\n"
            + " * Unless required by applicable law or agreed to in
writing, software\n"
            + " * distributed under the License is distributed on an
\"AS IS\" BASIS,\n"
            + " * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
express or implied.\n"
            + " * See the License for the specific language governing
permissions and\n"
            + " * limitations under the License.\n"
            + " *
========================================================================\n"
            + " */\n"
            ;
        }
    };
}

// Annotation Type Definition for the Apache Copyright
@CopyRightApache
@Documented
@Retention(RetentionPolicy.RUNTIME)
public @interface CopyRightApache {
    CopyRightType value() default CopyRightType.APACHE;
}

// JUnit test case for the Apache Copyright artifacts.
import junit.framework.TestCase;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;

@CopyRightApache
@TestOnly
public class CopyRightApacheTest extends TestCase {
    private Log log = LogFactory.getLog(this.getClass());

    public void test() {
        log.debug(this.getClass().getAnnotation(CopyRightApache.class));
    }
}

An interesting result is that the enum and annotation are themselves
recursively annotated by the same copyright they define.


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Re: Copyright in JDK1.5

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