【Java开源代码栏目提醒】:网学会员--在 Java开源代码编辑为广大网友搜集整理了:BeanRepository.java绩等信息,祝愿广大网友取得需要的信息,参考学习。
/*
* $Header: /cvsroot/jetty/Jetty3/src/org/apache/jasper/compiler/BeanRepository.java,v 1.1 2000/10/09 17:57:40 gregwilkins Exp $
* $Revision: 1.1 $
* $Date: 2000/10/09 17:57:40 $
*
* ====================================================================
*
* The Apache Software License, Version 1.1
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
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* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* the documentation and/or other materials provided with the
* distribution.
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* any, must include the following acknowlegement:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowlegement may appear in the software itself,
* if and wherever such third-party acknowlegements normally appear.
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* Foundation" must not be used to endorse or promote products derived
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* 5. Products derived from this software may not be called "Apache"
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package org.apache.jasper.compiler;
import java.util.Vector;
import java.util.Enumeration;
import java.util.Hashtable;
import java.beans.Beans;
import java.beans.BeanInfo;
import java.beans.PropertyDescriptor;
import javax.servlet.ServletException;
import org.apache.jasper.JasperException;
/**
* Holds instances of {session, application, page}-scoped beans
*
* @author Mandar Raje
*/
public class BeanRepository {
Vector sessionBeans;
Vector pageBeans;
Vector appBeans;
Vector requestBeans;
Hashtable beanTypes;
ClassLoader loader;
public BeanRepository (ClassLoader loader) {
sessionBeans = new Vector(11);
pageBeans = new Vector(11);
appBeans = new Vector(11);
requestBeans = new Vector(11);
beanTypes = new Hashtable ();
this.loader = loader;
}
public boolean checkSessionBean (String s) {
return sessionBeans.contains (s);
}
public void addSessionBean (String s, String type) throws JasperException {
sessionBeans.addElement (s);
putBeanType (s, type);
}
public boolean hasSessionBeans () {
return !sessionBeans.isEmpty ();
}
public Enumeration getSessionBeans () {
return sessionBeans.elements ();
}
public boolean checkApplicationBean (String s) {
return appBeans.contains (s);
}
public void addApplicationBean (String s, String type) throws JasperException
{
appBeans.addElement (s);
putBeanType (s, type);
}
public boolean hasApplicationBeans () {
return !appBeans.isEmpty ();
}
public Enumeration getApplicationBeans () {
return appBeans.elements ();
}
public boolean checkRequestBean (String s) {
return requestBeans.contains (s);
}
public void addRequestBean (String s, String type) throws JasperException {
requestBeans.addElement (s);
putBeanType (s, type);
}
public boolean hasRequestBeans () {
return !requestBeans.isEmpty ();
}
public Enumeration getRequestBeans () {
return requestBeans.elements ();
}
public boolean checkPageBean (String s) {
return pageBeans.contains (s);
}
public void addPageBean (String s, String type) throws JasperException {
pageBeans.addElement (s);
putBeanType (s, type);
}
public boolean hasPageBeans () {
return !pageBeans.isEmpty ();
}
public Enumeration getPageBeans () {
return pageBeans.elements ();
}
public boolean ClassFound (String clsname)
throws ClassNotFoundException {
Class cls = null;
//try {
cls = loader.loadClass(clsname) ;
//} catch (ClassNotFoundException ex) {
//return false;
//}
return !(cls == null);
}
public Class getBeanType (String bean) throws JasperException {
Class cls = null;
try {
cls = loader.loadClass((String)beanTypes.get(bean)) ;
} catch (ClassNotFoundException ex) {
throw new JasperException (ex);
}
return cls;
}
public void putBeanType (String bean, String type) throws JasperException {
try {
beanTypes.put (bean, type);
} catch (Exception ex) {
throw new JasperException (ex);
}
}
//public void putBeanType (String bean, Class type) {
//beanTypes.put (bean, type);
//}
public void removeBeanType (String bean) {
beanTypes.remove (bean);
}
// Not sure if this is the correct way.
// After pageContext is finalised this will change.
public boolean checkVariable (String bean) {
return (checkPageBean(bean) || checkSessionBean(bean) ||
checkRequestBean(bean) || checkApplicationBean(bean));
}
// Ideally this method should belong to the utils.
public Class getClass (String clsname)
throws ClassNotFoundException {
Class cls = null;
if (clsname != null) {
cls = loader.loadClass (clsname);
}
return cls;
}
public boolean beanFound (String beanName)
throws ClassNotFoundException {
try {
Beans.instantiate (loader, beanName);
return true;
} catch (java.io.IOException ex) {
// Ignore it for the time being.
return false;
}
}
}
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