testvmclass.java

来自「纯java操作系统jnode,安装简单和操作简单的个人使用的Java操作系统」· Java 代码 · 共 75 行

/**
 * $Id: TestVmClass.java,v 1.2 2004/01/02 08:41:55 epr Exp $
 */
package org.jnode.test;

import java.net.URL;
import java.util.HashMap;
import java.util.Map;

import junit.framework.TestCase;

import org.jnode.util.NumberUtils;
import org.jnode.vm.VmSystemClassLoader;
import org.jnode.vm.classmgr.VmClassLoader;
import org.jnode.vm.classmgr.VmType;
import org.jnode.vm.x86.VmX86Architecture;

/**
 * <description>
 * 
 * @author epr
 */
public class TestVmClass extends TestCase {
	
	private VmClassLoader clc;

	/**
	 * @see junit.framework.TestCase#setUp()
	 */
	protected void setUp() throws Exception {
		super.setUp();
		VmSystemClassLoader bib = new VmSystemClassLoader(new URL("file:///" + System.getProperty("classes.dir") + "/"), new VmX86Architecture());
		VmType.initializeForBootImage(bib);
		clc = bib;
	}
	
	public void testAssignableFrom() 
	throws Exception {
	
		testAssignableFrom(Map.class, HashMap.class);		
		testAssignableFrom(String.class, Object.class);
		testAssignableFrom(char[].class, Object.class);
		testAssignableFrom(char[].class, char[].class);
		testAssignableFrom(String.class, Comparable.class);
		testAssignableFrom(Comparable.class, String.class);
		testAssignableFrom(Object[].class, String[].class);
	}
	
	private void testAssignableFrom(Class c1, Class c2)
	throws Exception {
		
		System.out.println("test " + c1.getName() + ", " + c2.getName() + " = " + c1.isAssignableFrom(c2));
		
		final VmType vmC1 = clc.loadClass(c1.getName(), true);
		final VmType vmC2 = clc.loadClass(c2.getName(), true);

		System.out.println("\t" + vmC1.getName() + "\t0x" + NumberUtils.hex(vmC1.getAccessFlags()) + "\tarray " + vmC1.isArray());
		System.out.println("\t" + vmC2.getName() + "\t0x" + NumberUtils.hex(vmC2.getAccessFlags()) + "\tarray " + vmC2.isArray());
		
		if (c1.isAssignableFrom(c2)) {
			assertTrue(c1.getName() + " is assignableFrom " + c2.getName(), vmC1.isAssignableFrom(vmC2));
		} else {
			assertFalse(c1.getName() + " is not assignableFrom " + c2.getName(), vmC1.isAssignableFrom(vmC2));
		}

		if (c2.isAssignableFrom(c1)) {
			assertTrue(c2.getName() + " is assignableFrom " + c1.getName(), vmC2.isAssignableFrom(vmC1));
		} else {
			assertFalse(c2.getName() + " is not assignableFrom " + c1.getName(), vmC2.isAssignableFrom(vmC1));
		}
	}
	

}