vmjavaclassloader.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 131 行

/*
 * $Id: VmJavaClassLoader.java,v 1.4 2004/02/19 20:23:14 epr Exp $
 */
package org.jnode.vm;

import java.util.HashMap;

import org.jnode.vm.classmgr.SelectorMap;
import org.jnode.vm.classmgr.VmMethod;
import org.jnode.vm.classmgr.VmStatics;
import org.jnode.vm.classmgr.VmType;

/**
 * @author Ewout Prangsma ([e-mail])
 */
public final class VmJavaClassLoader extends VmAbstractClassLoader {

    /** The java classloader */
    private final ClassLoader loader;

    /** The system classloader */
    private final VmSystemClassLoader systemLoader;

    /** The loaded classes (nbame, VmType) */
    private final HashMap loadedClasses = new HashMap();

    /**
     * Initialize this class.
     * 
     * @param loader
     */
    public VmJavaClassLoader(ClassLoader loader) {
        this.loader = loader;
        this.systemLoader = VmSystem.getSystemClassLoader();
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#asClassLoader()
     */
    public final ClassLoader asClassLoader() {
        return loader;
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#compileRuntime(org.jnode.vm.classmgr.VmMethod,
     *      int)
     */
    public final void compileRuntime(VmMethod vmMethod, int optLevel) {
        systemLoader.compileRuntime(vmMethod, optLevel);
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#findLoadedClass(java.lang.String)
     */
    public final VmType findLoadedClass(String className) {
        return (VmType) loadedClasses.get(className);
    }

    /**
     * Add a class that has been loaded.
     * 
     * @param name
     * @param cls
     */
    public final void addLoadedClass(String name, VmType cls) {
        loadedClasses.put(name, cls);
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#getArchitecture()
     */
    public final VmArchitecture getArchitecture() {
        return systemLoader.getArchitecture();
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#isCompileRequired()
     */
    public final boolean isCompileRequired() {
        return systemLoader.isCompileRequired();
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#loadClass(java.lang.String,
     *      boolean)
     */
    public final VmType loadClass(String className, boolean resolve)
            throws ClassNotFoundException {
        final VmType cls;
        if (className.charAt(0) == '[') {
            cls = loadArrayClass(className, resolve);
            addLoadedClass(className, cls);
        } else {
            cls = loader.loadClass(className).getVmClass();
        }
        if (resolve) {
            cls.link();
        }
        return cls;
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#isSystemClassLoader()
     */
    public final boolean isSystemClassLoader() {
        return false;
    }

    /**
     * @see org.jnode.vm.VmAbstractClassLoader#getSelectorMap()
     */
    protected final SelectorMap getSelectorMap() {
        return systemLoader.getSelectorMap();
    }

    /**
     * @see org.jnode.vm.VmAbstractClassLoader#getStatics()
     */
    public final VmStatics getStatics() {
        return systemLoader.getStatics();
    }

    /**
     * @see org.jnode.vm.classmgr.VmClassLoader#resourceExists(java.lang.String)
     */
    public final boolean resourceExists(String resName) {
        return false;
    }

}