defaultmoduledescriptorfactory.java

来自「模块化您的应用系统」· Java 代码 · 共 53 行

package com.opensymphony.tonic;

import com.opensymphony.tonic.loaders.SinglePluginLoader;
import com.opensymphony.tonic.util.ClassLoaderUtils;

import java.util.Map;
import java.util.HashMap;

public class DefaultModuleDescriptorFactory implements ModuleDescriptorFactory
{
    private Map moduldeDescriptorClasses;

    public DefaultModuleDescriptorFactory()
    {
        this.moduldeDescriptorClasses = new HashMap();
    }

    public Class getModuleDescriptorClass(String type)
    {
        return (Class) moduldeDescriptorClasses.get(type);
    }

    public ModuleDescriptor getModuleDescriptor(String type) throws PluginParseException, IllegalAccessException, InstantiationException, ClassNotFoundException
    {
        Class moduleDescriptorClazz = getModuleDescriptorClass(type);

        if (moduleDescriptorClazz == null)
            throw new PluginParseException("Cannot find ModuleDescriptor class for plugin of type '" + type + "'.");

        return (ModuleDescriptor) ClassLoaderUtils.loadClass(moduleDescriptorClazz.getName(), SinglePluginLoader.class).newInstance();
    }

    public boolean hasModuleDescriptor(String type)
    {
        return moduldeDescriptorClasses.containsKey(type);
    }

    public void addModuleDescriptor(String type, Class moduleDescriptorClass)
    {
        moduldeDescriptorClasses.put(type, moduleDescriptorClass);
    }

    public void removeModuleDescriptorForType(String type)
    {
        moduldeDescriptorClasses.remove(type);
    }

    protected Map getDescriptorClassesMap()
    {
        return moduldeDescriptorClasses;
    }
}