com.viiyue.plugins.mybatis.utils.FieldUtil Maven / Gradle / Ivy
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/**
* Copyright (C) 2017 the original author or authors.
*
* 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.viiyue.plugins.mybatis.utils;
import java.beans.IntrospectionException;
import java.beans.Introspector;
import java.beans.PropertyDescriptor;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.apache.commons.lang3.reflect.FieldUtils;
import com.viiyue.plugins.mybatis.exceptions.ReflectionException;
/**
*
* Utilities for working with {@link Field}s by reflection. Adapted and
* refactored from the dormant [reflect] Commons sandbox component.
*
*
* The ability is provided to break the scoping restrictions coded by the
* programmer. This can allow fields to be changed that shouldn't be. This
* facility should be used with care.
*
* @author tangxbai
* @since 1.1.0
*/
public class FieldUtil {
private FieldUtil() {}
public static T readValue( Object instance, String filedName ) {
try {
return ( T ) FieldUtils.readField( instance, filedName, true );
} catch ( IllegalAccessException e ) {
throw new ReflectionException( e.getMessage(), e );
}
}
public static List getAllFileds( Class beanType ) {
final List allFields = new ArrayList<>();
List> allTypes = ClassUtil.getAllTypes( beanType );
for ( Class type : allTypes ) {
Collections.addAll( allFields, type.getDeclaredFields() );
}
return Collections.unmodifiableList( allFields );
}
public static List getAllFiledNames( Class beanType ) {
final List allFieldNames = new ArrayList<>();
List> allTypes = ClassUtil.getAllTypes( beanType );
for ( Class type : allTypes ) {
for ( Field field : type.getDeclaredFields() ) {
int modifier = field.getModifiers();
if ( ( modifier & Modifier.STATIC ) == 0 && ( modifier & Modifier.FINAL ) == 0 ) {
allFieldNames.add( field.getName() );
}
}
}
return Collections.unmodifiableList( allFieldNames );
}
public static PropertyDescriptor getDescriptor( Class type, String fieldName ) {
try {
return new PropertyDescriptor( fieldName, type );
} catch ( IntrospectionException e ) {
throw new ReflectionException( e.getMessage(), e );
}
}
public static PropertyDescriptor [] getPropertyDescriptors( Class type ) {
try {
return Introspector.getBeanInfo( type ).getPropertyDescriptors();
} catch ( IntrospectionException e ) {
throw new ReflectionException( e.getMessage(), e );
}
}
}