271 lines
7.7 KiB
Java
271 lines
7.7 KiB
Java
/**
|
|
* Copyright (c) 2011-2019, James Zhan 詹波 (jfinal@126.com).
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
package com.jfinal.template.expr.ast;
|
|
|
|
import java.lang.reflect.Array;
|
|
import com.jfinal.kit.StrKit;
|
|
|
|
/**
|
|
* FieldGetters 封装官方默认 FieldGetter 实现
|
|
*/
|
|
public class FieldGetters {
|
|
|
|
/**
|
|
* NullFieldGetter
|
|
*
|
|
* 用于消除 FieldKit.getFieldGetter(...) 中的 instanceof 判断，并且让 Map fieldGetterCache
|
|
* 中的 value 不必使用 Object 类型。还消除了 Field.exec(...) 中的 null 值判断
|
|
*/
|
|
public static class NullFieldGetter extends FieldGetter {
|
|
|
|
public static final NullFieldGetter me = new NullFieldGetter();
|
|
|
|
public boolean notNull() {
|
|
return false;
|
|
}
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
throw new RuntimeException("The method takeOver(Class, String) of NullFieldGetter should not be invoked");
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
throw new RuntimeException("The method get(Object, String) of NullFieldGetter should not be invoked");
|
|
}
|
|
}
|
|
|
|
/**
|
|
* GetterMethodFieldGetter
|
|
*
|
|
* 使用 getter 方法获取 target.field 表达式的值
|
|
*/
|
|
public static class GetterMethodFieldGetter extends FieldGetter {
|
|
|
|
protected java.lang.reflect.Method getterMethod;
|
|
|
|
public GetterMethodFieldGetter(java.lang.reflect.Method getterMethod) {
|
|
this.getterMethod = getterMethod;
|
|
}
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
if (MethodKit.isForbiddenClass(targetClass)) {
|
|
throw new RuntimeException("Forbidden class: " + targetClass.getName());
|
|
}
|
|
|
|
String getterName = "get" + StrKit.firstCharToUpperCase(fieldName);
|
|
java.lang.reflect.Method[] methodArray = targetClass.getMethods();
|
|
for (java.lang.reflect.Method method : methodArray) {
|
|
if (method.getName().equals(getterName) && method.getParameterTypes().length == 0) {
|
|
// if (MethodKit.isForbiddenMethod(getterName)) {
|
|
// throw new RuntimeException("Forbidden method: " + getterName);
|
|
// }
|
|
|
|
return new GetterMethodFieldGetter(method);
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return getterMethod.invoke(target, ExprList.NULL_OBJECT_ARRAY);
|
|
}
|
|
|
|
public String toString() {
|
|
return getterMethod.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* IsMethodFieldGetter
|
|
*
|
|
* 使用 target.isXxx() 方法获取值，默认不启用该功能，用户可以通过如下方式启用：
|
|
* Engine.addLastFieldGetter(new FieldGetters.IsMethodFieldGetter());
|
|
*/
|
|
public static class IsMethodFieldGetter extends FieldGetter {
|
|
|
|
protected java.lang.reflect.Method isMethod;
|
|
|
|
// 此构造方法仅为了方便在 Engine.addFieldGetter(...) 添加时不用为构造方法传参
|
|
public IsMethodFieldGetter() {
|
|
}
|
|
|
|
public IsMethodFieldGetter(java.lang.reflect.Method isMethod) {
|
|
this.isMethod = isMethod;
|
|
}
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
if (MethodKit.isForbiddenClass(targetClass)) {
|
|
throw new RuntimeException("Forbidden class: " + targetClass.getName());
|
|
}
|
|
|
|
String isMethodName = "is" + StrKit.firstCharToUpperCase(fieldName);
|
|
java.lang.reflect.Method[] methodArray = targetClass.getMethods();
|
|
for (java.lang.reflect.Method method : methodArray) {
|
|
if (method.getName().equals(isMethodName) && method.getParameterTypes().length == 0) {
|
|
Class<?> returnType = method.getReturnType();
|
|
if (returnType == Boolean.class || returnType == boolean.class) {
|
|
return new IsMethodFieldGetter(method);
|
|
}
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return isMethod.invoke(target, ExprList.NULL_OBJECT_ARRAY);
|
|
}
|
|
|
|
public String toString() {
|
|
return isMethod.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ModelFieldGetter
|
|
*
|
|
* 使用 Model.get(String) 获取值
|
|
|
|
public static class ModelFieldGetter extends FieldGetter {
|
|
|
|
// 所有 Model 可以共享 ModelFieldGetter 获取属性
|
|
static final ModelFieldGetter singleton = new ModelFieldGetter();
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
if (com.jfinal.plugin.activerecord.Model.class.isAssignableFrom(targetClass)) {
|
|
return singleton;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return ((com.jfinal.plugin.activerecord.Model<?>)target).get(fieldName);
|
|
}
|
|
} */
|
|
|
|
/**
|
|
* RecordFieldGetter
|
|
*
|
|
* 使用 Record.get(String) 获取值
|
|
|
|
public static class RecordFieldGetter extends FieldGetter {
|
|
|
|
// 所有 Record 可以共享 RecordFieldGetter 获取属性
|
|
static final RecordFieldGetter singleton = new RecordFieldGetter();
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
if (com.jfinal.plugin.activerecord.Record.class.isAssignableFrom(targetClass)) {
|
|
return singleton;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return ((com.jfinal.plugin.activerecord.Record)target).get(fieldName);
|
|
}
|
|
} */
|
|
|
|
/**
|
|
* MapFieldGetter
|
|
*
|
|
* 使用 Map.get(Object) 获取值
|
|
*/
|
|
public static class MapFieldGetter extends FieldGetter {
|
|
|
|
// 所有 Map 可以共享 MapFieldGetter 获取属性
|
|
static final MapFieldGetter singleton = new MapFieldGetter();
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
if (java.util.Map.class.isAssignableFrom(targetClass)) {
|
|
return singleton;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return ((java.util.Map<?, ?>)target).get(fieldName);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* RealFieldGetter
|
|
*
|
|
* 使用 target.field 获取值
|
|
*/
|
|
public static class RealFieldGetter extends FieldGetter {
|
|
|
|
protected java.lang.reflect.Field field;
|
|
|
|
public RealFieldGetter(java.lang.reflect.Field field) {
|
|
this.field = field;
|
|
}
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
java.lang.reflect.Field[] fieldArray = targetClass.getFields();
|
|
for (java.lang.reflect.Field field : fieldArray) {
|
|
if (field.getName().equals(fieldName)) {
|
|
return new RealFieldGetter(field);
|
|
}
|
|
}
|
|
|
|
return null;
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return field.get(target);
|
|
}
|
|
|
|
public String toString() {
|
|
return field.toString();
|
|
}
|
|
}
|
|
|
|
/**
|
|
* ArrayLengthGetter
|
|
*
|
|
* 获取数组长度： array.length
|
|
*/
|
|
public static class ArrayLengthGetter extends FieldGetter {
|
|
|
|
// 所有数组可以共享 ArrayLengthGetter 获取属性
|
|
static final ArrayLengthGetter singleton = new ArrayLengthGetter();
|
|
|
|
public FieldGetter takeOver(Class<?> targetClass, String fieldName) {
|
|
if ("length".equals(fieldName) && targetClass.isArray()) {
|
|
return singleton;
|
|
} else {
|
|
return null;
|
|
}
|
|
}
|
|
|
|
public Object get(Object target, String fieldName) throws Exception {
|
|
return Array.getLength(target);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|