typesbadarg.java

来自「是一款用JAVA 编写的编译器 具有很强的编译功能」· Java 代码 · 共 113 行

/*
 * Copyright 2006 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/*
 * @test
 * @bug     6345812
 * @summary Validate argument kinds in Types utilities
 * @author  Scott Seligman
 * @build   TypesBadArg
 * @compile -processor TypesBadArg -proc:only TypesBadArg.java
 */

import java.util.Set;
import javax.annotation.processing.*;
import javax.lang.model.element.*;
import javax.lang.model.type.*;
import javax.lang.model.util.*;

@SupportedAnnotationTypes("*")
public class TypesBadArg extends AbstractProcessor {

    boolean success = true;

    public void init(ProcessingEnvironment penv) {
	super.init(penv);
    }

    public boolean process(Set<? extends TypeElement> tes,
			   RoundEnvironment round) {
	if (round.processingOver()) return true;

	final Elements elements = processingEnv.getElementUtils();
	final Types types = processingEnv.getTypeUtils();

	final TypeMirror javaLang =
	    elements.getPackageElement("java.lang").asType();

	makeBadCall(new Runnable() {
	    public void run() {
		types.isSubtype(javaLang, javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.isAssignable(javaLang, javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.contains(javaLang, javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.directSupertypes(javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.erasure(javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.capture(javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.unboxedType(javaLang);
	    }
	});
	makeBadCall(new Runnable() {
	    public void run() {
		types.unboxedType(types.getNoType(TypeKind.VOID));
	    }
	});
	if (! success)
	    throw new AssertionError("Some test(s) failed.");
	return true;
    }

    private void makeBadCall(Runnable runnable) {
	try {
	    runnable.run();
	    System.out.println("Failure: IllegalArgumentException expected");
	    success = false;
	} catch (IllegalArgumentException e) {
	    System.out.println("IllegalArgumentException as expected");
	}
    }
}