Java 类org.apache.commons.beanutils.LazyDynaBean 实例源码

private void copy(final Directory directory, final Map<String, Object> metadata) {
    final TagDescriptor<?> descriptor = MetadataHelper.getDescriptor(directory);

    final LazyDynaClass directoryClass = new LazyDynaClass(directory.getName(), null, directory.getTags()
            .parallelStream()
            .map(t -> new DynaProperty(t.getTagName().replaceAll(NON_WORD_CHARS, ""), String.class))
            .toArray(DynaProperty[]::new));
    directoryClass.setReturnNull(true);

    final DynaBean directoryMetadata = new LazyDynaBean(directoryClass);
    directory.getTags().stream().forEach(t -> directoryMetadata.set(
            t.getTagName().replaceAll(NON_WORD_CHARS, ""),
            descriptor.getDescription(t.getTagType())
    ));
    metadata.put(directory.getName().replaceAll(NON_WORD_CHARS, ""), directoryMetadata);
}

@Override
     protected void setUp() throws Exception {
         target = new LazyDynaBean();

final Fixture decorated = context.mock(Fixture.class);

context.checking(new Expectations()
{{
    between(0, 2).of(decorated).canCheck("property");
    will(returnValue(false));
    between(0, 2).of(decorated).canSend("property");
    will(returnValue(false));
    between(0, 2).of(decorated).getTarget();
    will(returnValue(target));
}});
         fixture = new DynaBeanFixture(decorated);
     }

/**
 * Velocity 模板发送邮件 html 格式
 *
 * @param to
 * @param subject
 * @throws javax.mail.MessagingException
 */
public void sendMailVelocity(String from ,String[] to, String subject) throws MessagingException {

    //如果不是 html 格式，修改为  SimpleMailMessage
    MimeMessage message = mailSender.createMimeMessage();
    MimeMessageHelper helper = new MimeMessageHelper(message, true, StandardCharsets.UTF_8.toString());

    /**
     *邮件内容
     */
    helper.setFrom(from);
    helper.setTo(to);
    helper.setSubject(subject);

    //模板内容
    Map<String, Object> model = new HashMap<String, Object>();
    model.put("firstName", "Yashwant");
    model.put("lastName", "Chavan");
    model.put("location", "china");
    //创建动态 bean
    DynaBean dynaBean = new LazyDynaBean();
    dynaBean.set("name", "It is name"); //simple
    dynaBean.set("gender", new Integer(1));  //simple
    //设置 bean 属性

    // Velocity 工具类，实例可以直接放入 map ,在模板文件中直接使用
    // 如日期格式化 $dateTool.format("yyyy-MM-dd",$info.issueTime)
    DateTool dateTool = new DateTool();//日期工具
    NumberTool numberTool = new NumberTool();//数字工具
    model.put("dateTool",dateTool);
    model.put("numberTool",numberTool);

    model.put("bean", dynaBean);
    String text = VelocityEngineUtils.mergeTemplateIntoString(velocityEngine, "./templates/velocity_template_email-newsletter.vm", StandardCharsets.UTF_8.toString(), model);
    helper.setText(text, true);

    mailSender.send(message);
}

@RequestMapping(value = "/website/test.html")
public String testDynaBeanController(Model model) {

    //创建动态 bean
    DynaBean dynaBean = new LazyDynaBean();

    //字符串属性，通过属性名 name 调用
    dynaBean.set("name", "Peter Collinson"); //simple

    //数字属性 ,通过属性名 gender 调用
    dynaBean.set("gender", new Integer(1));  //simple

    //bean 属性,通过属性名 bean 调用
    UserBean beanExample = new UserBean();
    beanExample.setName("name string."); //simple
    dynaBean.set("bean", beanExample);

    //map 属性，通过 customer 和 title 调用
    dynaBean.set("customer", "title", "Mr");      // mapped
    dynaBean.set("customer", "surname", "Smith"); // mapped

    //可以指定属性顺序,通过 address 和 顺序号调用
    /**
     * 此方式无法通过 jstl 调用，不使用
     * */
    dynaBean.set("address", 0, "addressLine1");     // indexed
    dynaBean.set("address", 1, "addressLine2");     // indexed
    dynaBean.set("address", 2, "addressLine3");     // indexed

    //其他用法
    /**
     * 可以转换成  map ， 用法同 LazyDynaBean
     */
    LazyDynaMap dynaMapBean = new LazyDynaMap();
    dynaMapBean.set("name", "Peter Collinson"); //simple;
    Map myMap = dynaMapBean.getMap();   // retrieve the Map


    //传递到前端
    model.addAttribute("test", dynaBean);
    return "2760/jsp/test";

    /**
     * 前端调用
     */
    //页面 jstl 读取，不需要，用引入任何类，仅引入 jstl 标签即可使用
    //注意，使用 map 这个关键字
    //http://commons.apache.org/proper/commons-beanutils/apidocs/org/apache/commons/beanutils/BasicDynaBean.html
    //官方 doc 中，getMap() 方法解释处有说明

    /**
       调用代码 : test 为 bean 名称，如果是字符串 $ {map.name} 即可
     $ {test.map.name} <br />
     $ {test.map.gender} <br />
     $ {test.map.bean.name} <br />
     $ {test.map.customer.title} <br />
     $ {test.map.customer.surname} <br />

     */

    //http://www.programgo.com/article/85353617047/
}

protected void setUp() throws Exception {
    DynaProperty name = new DynaProperty("name", int.class);
    bean = new LazyDynaBean(new LazyDynaClass("target", new DynaProperty[] { name } ));
}

@Test
public void testDynaBeans() throws Exception
{
    // for usage, see
    // http://commons.apache.org/proper/commons-beanutils/javadocs/v1.9.2/apidocs/org/apache/commons/beanutils/package-summary.html#package_description

    final DynaBean dynaBean = new LazyDynaBean(); // Create LazyDynaBean
    final MutableDynaClass dynaClass = (MutableDynaClass) dynaBean
            .getDynaClass(); // get DynaClass

    dynaClass.add("amount", java.lang.Integer.class); // add property
    dynaClass.add("myMap", java.util.TreeMap.class); // add mapped property

    final DynaBean employee = dynaClass.newInstance();

    // TODO experiment with Jackson's AnnotationIntrospector to annotate
    // DynaBean#get(...) method with @JsonAnyGetter and #set(...) method
    // with @JsonAnySetter

    employee.set("address", new HashMap<String, String>());
    employee.set("activeEmployee", Boolean.FALSE);
    employee.set("firstName", "Fred");
    employee.set("lastName", "Flintstone");

    LOG.trace("Employee: " + JsonUtil.toPrettyJSON(employee));

    // set all <activeEmployee> attribute values to <true>
    final BeanPropertyValueChangeClosure closure = new BeanPropertyValueChangeClosure(
            "activeEmployee", Boolean.TRUE);

    final Collection<?> employees = Collections.singleton(employee);
    LOG.trace("Mutated employees: " + JsonUtil.toPrettyJSON(employees));

    // update the Collection
    CollectionUtils.forAllDo(employees, closure);

    // filter for beans with <activeEmployee> set to <false>
    final BeanPropertyValueEqualsPredicate predicate = new BeanPropertyValueEqualsPredicate(
            "lastName", "Flintstone");

    // filter the Collection
    CollectionUtils.filter(employees, predicate);
    LOG.trace("Filtered employees: " + JsonUtil.toPrettyJSON(employees));
}

/**
 * 使用 <code>valueMap</code> 来构造一个 DynaBean.
 * 
 * <h3>说明:</h3>
 * <blockquote>
 * <ol>
 * <li>一般情况下,你可能不需要使用这个方法</li>
 * <li>很适合那种属性值数量不确定,并且又不想在页面使用map来渲染的地方,比如制作多维度的图表</li>
 * <li>程序内部,默认使用的是 {@link org.apache.commons.beanutils.LazyDynaClass}</li>
 * <li>不需要先创建一个期望的数据结构DynaClass,就能向{@link LazyDynaBean}中填充我们任意想填充的数据。</li>
 * <li>{@link LazyDynaBean}内部会根据我们填充进的数据(即使是一个map中的一个key-value pair),创建metadata的。</li>
 * </ol>
 * </blockquote>
 * 
 * <h3>示例:</h3>
 * 
 * <blockquote>
 * 
 * <pre class="code">
 * DynaBean newDynaBean = BeanUtil.newDynaBean(
 *                 toMap(//
 *                                 Pair.of("address", (Object) newHashMap()),
 *                                 Pair.of("firstName", (Object) "Fred"),
 *                                 Pair.of("lastName", (Object) "Flintstone")));
 * LOGGER.debug(JsonUtil.format(newDynaBean));
 * </pre>
 * 
 * <b>返回:</b>
 * 
 * <pre class="code">
 * {
 * "address": {},
 * "firstName": "Fred",
 * "lastName": "Flintstone"
 * }
 * </pre>
 * 
 * </blockquote>
 *
 * @param valueMap
 *            the value map
 * @return the dyna bean
 * @throws NullPointerException
 *             如果 <code>valueMap</code> 是null,或者 <code>valueMap</code>中有key是null
 * @throws IllegalArgumentException
 *             如果<code>valueMap</code>中有key是empty
 * @see org.apache.commons.beanutils.LazyDynaBean
 * @since 1.8.1
 */
public static DynaBean newDynaBean(Map<String, ?> valueMap){
    Validate.notNull(valueMap, "valueMap can't be null!");

    LazyDynaBean lazyDynaBean = new LazyDynaBean();
    for (Map.Entry<String, ?> entry : valueMap.entrySet()){
        Validate.notBlank(entry.getKey(), "entry.getKey() can't be blank!");
        lazyDynaBean.set(entry.getKey(), entry.getValue());
    }
    return lazyDynaBean;
}

/**
 * Default Constructor which creates a <code>LazyDynaBean</code> to <i>back</i>
 * this form.
 */
public LazyValidatorForm() {
    super(new LazyDynaBean());
}

/**
* <p>Return the <code>Map</code> containing the property values.</p>
*
* <p>Provided so that properties can be access using JSTL.</p>
*/
public Map getMap() {
    return ((LazyDynaBean)dynaBean).getMap();
}

/**
* <p>Creates new <code>DynaBean</code> instances to populate
*    an 'indexed' property of beans - defaults to <code>LazyDynaBean</code>
*    type.</p>
*
* <p>Override this method if you require a different type of
*    <code>DynaBean</code>.</p>
*/
protected DynaBean newIndexedBean(String name) {
    return new LazyDynaBean();
}

/**
 * Default Constructor which creates a <code>LazyDynaBean</code> to
 * <i>back</i> this form.
 */
public LazyValidatorForm() {
    super(new LazyDynaBean());
}

/**
 * <p>Return the <code>Map</code> containing the property values.</p>
 *
 * <p>Provided so that properties can be access using JSTL.</p>
 */
public Map getMap() {
    return ((LazyDynaBean) dynaBean).getMap();
}

/**
 * <p>Creates new <code>DynaBean</code> instances to populate an 'indexed'
 * property of beans - defaults to <code>LazyDynaBean</code> type.</p>
 *
 * <p>Override this method if you require a different type of
 * <code>DynaBean</code>.</p>
 */
protected DynaBean newIndexedBean(String name) {
    return new LazyDynaBean();
}