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public class BeanWrapper extends BaseWrapper {
private final Object object;
private final MetaClass metaClass;
/**
* 构造
* @param metaObject
* @param object
*/
public BeanWrapper(MetaObject metaObject, Object object) {
super(metaObject);
this.object = object;
this.metaClass = MetaClass.forClass(object.getClass(), metaObject.getReflectorFactory());
}
@Override
public Object get(PropertyTokenizer prop) {
// 索引不为空
if (prop.getIndex() != null) {
// 实例化集合对象
Object collection = resolveCollection(prop, object);
return getCollectionValue(prop, collection);
} else {
// 没有索引
return getBeanProperty(prop, object);
}
}
@Override
public void set(PropertyTokenizer prop, Object value) {
// 是否存在索引
if (prop.getIndex() != null) {
Object collection = resolveCollection(prop, object);
// 向上层调用 BaseWrapper
setCollectionValue(prop, collection, value);
} else {
// 本类方法
setBeanProperty(prop, object, value);
}
}
@Override
public String findProperty(String name, boolean useCamelCaseMapping) {
return metaClass.findProperty(name, useCamelCaseMapping);
}
@Override
public String[] getGetterNames() {
return metaClass.getGetterNames();
}
@Override
public String[] getSetterNames() {
return metaClass.getSetterNames();
}
@Override
public Class<?> getSetterType(String name) {
PropertyTokenizer prop = new PropertyTokenizer(name);
if (prop.hasNext()) {
MetaObject metaValue = metaObject.metaObjectForProperty(prop.getIndexedName());
// 是否null
if (metaValue == SystemMetaObject.NULL_META_OBJECT) {
return metaClass.getSetterType(name);
} else {
return metaValue.getSetterType(prop.getChildren());
}
} else {
return metaClass.getSetterType(name);
}
}
@Override
public Class<?> getGetterType(String name) {
PropertyTokenizer prop = new PropertyTokenizer(name);
if (prop.hasNext()) {
MetaObject metaValue = metaObject.metaObjectForProperty(prop.getIndexedName());
if (metaValue == SystemMetaObject.NULL_META_OBJECT) {
return metaClass.getGetterType(name);
} else {
return metaValue.getGetterType(prop.getChildren());
}
} else {
return metaClass.getGetterType(name);
}
}
@Override
public boolean hasSetter(String name) {
PropertyTokenizer prop = new PropertyTokenizer(name);
if (prop.hasNext()) {
if (metaClass.hasSetter(prop.getIndexedName())) {
MetaObject metaValue = metaObject.metaObjectForProperty(prop.getIndexedName());
if (metaValue == SystemMetaObject.NULL_META_OBJECT) {
return metaClass.hasSetter(name);
} else {
return metaValue.hasSetter(prop.getChildren());
}
} else {
return false;
}
} else {
return metaClass.hasSetter(name);
}
}
/**
* 是否包含 name 的get 方法
* @param name
* @return
*/
@Override
public boolean hasGetter(String name) {
PropertyTokenizer prop = new PropertyTokenizer(name);
if (prop.hasNext()) {
if (metaClass.hasGetter(prop.getIndexedName())) {
MetaObject metaValue = metaObject.metaObjectForProperty(prop.getIndexedName());
if (metaValue == SystemMetaObject.NULL_META_OBJECT) {
return metaClass.hasGetter(name);
} else {
return metaValue.hasGetter(prop.getChildren());
}
} else {
return false;
}
} else {
return metaClass.hasGetter(name);
}
}
/**
* 数据嵌套处理 a.b.c 需要处理成 a->b->c
* @param name
* @param prop
* @param objectFactory
* @return
*/
@Override
public MetaObject instantiatePropertyValue(String name, PropertyTokenizer prop, ObjectFactory objectFactory) {
MetaObject metaValue;
Class<?> type = getSetterType(prop.getName());
try {
Object newObject = objectFactory.create(type);
// 出现嵌套处理 instantiatePropertyValue->set
metaValue = MetaObject.forObject(newObject, metaObject.getObjectFactory(), metaObject.getObjectWrapperFactory(), metaObject.getReflectorFactory());
set(prop, newObject);
} catch (Exception e) {
throw new ReflectionException("Cannot set value of property '" + name + "' because '" + name + "' is null and cannot be instantiated on instance of " + type.getName() + ". Cause:" + e.toString(), e);
}
return metaValue;
}
/**
* 获取 object 的 prop 属性值
* @param prop
* @param object
* @return
*/
private Object getBeanProperty(PropertyTokenizer prop, Object object) {
try {
// 获取get 方法
Invoker method = metaClass.getGetInvoker(prop.getName());
try {
// 获取属性值
return method.invoke(object, NO_ARGUMENTS);
} catch (Throwable t) {
throw ExceptionUtil.unwrapThrowable(t);
}
} catch (RuntimeException e) {
throw e;
} catch (Throwable t) {
throw new ReflectionException("Could not get property '" + prop.getName() + "' from " + object.getClass() + ". Cause: " + t.toString(), t);
}
}
/**
* 设置 object 的属性 prop 值为 value
* @param prop
* @param object
* @param value
*/
private void setBeanProperty(PropertyTokenizer prop, Object object, Object value) {
try {
// 获取set 方法
Invoker method = metaClass.getSetInvoker(prop.getName());
Object[] params = {value};
try {
// 设置属性
method.invoke(object, params);
} catch (Throwable t) {
throw ExceptionUtil.unwrapThrowable(t);
}
} catch (Throwable t) {
throw new ReflectionException("Could not set property '" + prop.getName() + "' of '" + object.getClass() + "' with value '" + value + "' Cause: " + t.toString(), t);
}
}
@Override
public boolean isCollection() {
return false;
}
@Override
public void add(Object element) {
throw new UnsupportedOperationException();
}
@Override
public <E> void addAll(List<E> list) {
throw new UnsupportedOperationException();
}
}
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