自己实现的一个XML对象容器

IApplicationContent为容器，通过其中的方法可以添加配置文件，根据ID获得注入对象。注入对象xml规范见template.dtd。添加的配置文件交由IXMLParse负责解析。IXMLParse将文件解析的信息存放入配件IBean中，IBean中存放着关于对象类型，生产函数及其参数（不设定name属性或属性值为空时为构造函数），还有一些预定义的属性及值，参数和属性均支持引用注入的其他对象。属性及参数对应IProperty。
template.dtd

<?xml version="1.0" encoding="UTF-8"?>

<!ELEMENT ApplicationContent (bean*)>
<!ELEMENT bean (property*,construct?)>
<!ELEMENT property (#PCDATA)>
<!ELEMENT construct (param*)>
<!ELEMENT param (#PCDATA)>

<!ATTLIST bean id ID #REQUIRED>
<!ATTLIST bean class CDATA #REQUIRED>

<!ATTLIST property name CDATA #REQUIRED>
<!ATTLIST property type CDATA #REQUIRED>
<!ATTLIST property ref CDATA #IMPLIED>

<!ATTLIST construct name CDATA #IMPLIED>

<!ATTLIST param name CDATA #REQUIRED>
<!ATTLIST param type CDATA #REQUIRED>
<!ATTLIST param ref CDATA #IMPLIED>


IApplicationContent

/**
	 * 配置文件名,可以连续添加多个配置文件并解析为基本配件IBean的列表
	 * @return
	 */
	public IApplicationContent AddConfigFile(String fileName);
	/**
	 * 根据ID获得实例的引用，如果实例已生成过则直接返回，否则用反射生产
	 * @param id
	 * @return
	 */
	public Object getObjectByID(String id);

实现ApplicationContent

public IApplicationContent AddConfigFile(String fileName) {
		if (!fileList.contains(fileName)) {
			fileList.add(fileName);
			parse.setFileName(fileName);
			List list = parse.parse();
			if (list != null) {
				for (Object obj : list) {
					try {
						if (objs.containsKey(((IBean) obj).getID())) {
							throw (new BeanException())
									.setMessage("配置文件中的Bean的ID不能重复");
						}
					} catch (BeanException e) {
						e.printStackTrace();
					}
					objs.put(((IBean) obj).getID(), obj);
				}
			}
		}
		return this;
	}

	public Object getObjectByID(String id) {
		IBean bean = (IBean) objs.get(id);
		Object obj = bean.getInstance();
		if (obj != null) {
			return obj;
		}
		try {
			Class cls = Class.forName(bean.getClassName());
			Class[] ps = new Class[bean.getParams().size()];
			Object[] ops = new Object[bean.getParams().size()];
			Object pobj = null;
			Object method = null;
			IProperty prop = null;
			String mstr = bean.getConstruct();
			int i = 0;
			int count = bean.getParams().size();
			for (; i < count; i++) {
				ps[i] = Class.forName(((IProperty) bean.getParams().get(i))
						.getType());
			}
			for (i = 0; i < count; i++) {
				prop = (IProperty) bean.getParams().get(i);
				if (prop.isRef()) {
					ops[i] = this.getObjectByID((String)prop.getValue());
				} else {
					ops[i] = prop.getValue();
				}
			}

			try {
				if (mstr != null
						&& mstr != ""
						&& !mstr.equals(bean.getClassName().substring(
								bean.getClassName().lastIndexOf(".")))) {
					method = cls.getDeclaredMethod(mstr, ps);
					obj = cls.newInstance();
					((Method) method).invoke(obj, ops);
				} else {
					method = cls.getDeclaredConstructor(ps);
					obj = ((Constructor) method).newInstance(ops);
				}
				if (obj != null) {
					count = bean.getProperties().size();
					for (i = 0; i < count; i++) {
						prop = ((IProperty) bean.getProperties().get(i));
						mstr = (String) prop.getName();
						mstr = "set" + mstr.substring(0, 1).toUpperCase()
								+ mstr.substring(1);
						method = cls.getDeclaredMethod(mstr,
								new Class[] { Class.forName(prop.getType()) });
						pobj = prop.getValue();
						if (prop.isRef()) {
							pobj = this.getObjectByID((String) pobj);
						}
						((Method) method).invoke(obj, new Object[] { pobj });
					}
				}

				bean.setObj(obj);
				return bean.getInstance();

			} catch (SecurityException e) {
				System.out.println(e.getMessage());
				e.printStackTrace();
			} catch (NoSuchMethodException e) {
				System.out.println("类 " + bean.getClassName() + " 不存在方法 "
						+ mstr + ":" + e.getMessage());
				e.printStackTrace();
			} catch (IllegalArgumentException e) {
				System.out.println(e.getMessage());
				e.printStackTrace();
			} catch (InstantiationException e) {
				System.out.println(e.getMessage());
				e.printStackTrace();
			} catch (IllegalAccessException e) {
				System.out.println(e.getMessage());
				e.printStackTrace();
			} catch (InvocationTargetException e) {
				System.out.println(e.getMessage());
				e.printStackTrace();
			}
		} catch (ClassNotFoundException e) {
			System.out.println(e.getMessage());
			e.printStackTrace();
		}

		bean.setObj(null);
		return null;
	}

IXMLParse

public String getFileName();
	public IXMLParse setFileName(String fileName);
	/**
	 * 从配置文件解析实例信息并返回
	 * @param fileName
	 * @return
	 */
	public List parse();

实现BeanParse

public List parse() {
		if(fileName == null || "".equals(fileName)){
			System.out.println("Please set the config file");
			return null;
		}
		if(list == null){
			list = new ArrayList();
		}
		DocumentBuilder builder;
		IContentFactory factory = ContentFactory.instance();
		Document doc = null;
		Element eleb = null,elet = null;
		IBean bean = null;
		IProperty prop;
		NodeList beans; 
		NodeList props;
		NodeList cons;
		int i = 0,j = 0,countb = 0, countp = 0;
		try {
			builder = DocumentBuilderFactory.newInstance().newDocumentBuilder();
			doc = builder.parse(new BufferedInputStream(new FileInputStream(fileName)));
			eleb = doc.getDocumentElement();
			beans = eleb.getElementsByTagName("bean");
			countb = beans.getLength();
			for(;i < countb; i++){
				bean = factory.getBean();
				eleb = ((Element)beans.item(i));
				
				bean.setID(eleb.getAttribute("id"));
				bean.setClassName(eleb.getAttribute("class"));
				
				
				props = eleb.getElementsByTagName("property");
				countp = props.getLength();
				for(j = 0;j < countp; j++){
					prop = factory.getProperty();
					elet = (Element)props.item(j);
					
					prop.setName(elet.getAttribute("name"));
					prop.setType(elet.getAttribute("type"));
					prop.setRef(elet.hasAttribute("ref"));
					if(prop.isRef()){
						prop.setValue(elet.getAttribute("ref"));
					}else{
						prop.setValue(elet.getTextContent());
					}
					bean.addProperty(prop);
				}
				
				cons = eleb.getElementsByTagName("construct");
				if(cons.getLength() > 0){
					elet = (Element)cons.item(0);
					
					bean.setConstruct(elet.getAttribute("name"));
					
					props = elet.getElementsByTagName("param");
					countp = props.getLength();
					for(j = 0;j < countp; j++){
						prop = factory.getProperty();
						elet = (Element)props.item(j);
						
						prop.setName(elet.getAttribute("name"));
						prop.setType(elet.getAttribute("type"));
						prop.setRef(elet.hasAttribute("ref"));
						if(prop.isRef()){
							prop.setValue(elet.getAttribute("ref"));
						}else{
							prop.setValue(elet.getTextContent());
						}
						bean.addParam(prop);
					}
				}
				
				list.add(bean);
			}
		} catch (ParserConfigurationException e) {
			e.printStackTrace();
		} catch (SAXException e) {
			e.printStackTrace();
		} catch (FileNotFoundException e) {
			e.printStackTrace();
		} catch (IOException e) {
			e.printStackTrace();
		}
		return list;
	}
{/code]

  
  

    
      
        

          
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2010-06-11 18:11
      
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