spinjar.com.minidev.asm.Accessor Maven / Gradle / Ivy
package net.minidev.asm;
/*
* Copyright 2011 JSON-SMART 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.
*/
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Type;
/**
* Contains all information needed to access a java field.
*
* field, getter setter
*
* this object is used internally by BeansAccess
*
* @see BeansAccess
*
* @author Uriel Chemouni
*/
public class Accessor {
/**
* Field to access
*/
protected Field field;
/**
* Setter Methods if available
*/
protected Method setter;
/**
* getter Methods if available
*/
protected Method getter;
/**
* Filed index in object
*/
protected int index;
/**
* Filed Class
*/
protected Class type;
/**
* Filed Type using JDK 5+ generics if available
*/
protected Type genericType;
protected String fieldName;
/**
* getter for index
* @return Index
*/
public int getIndex() {
return index;
}
/**
* is the field access using Field access type
* @return if Accessor is public
*/
public boolean isPublic() {
return setter == null && getter == null;
}
/**
* is the field is an enum field
* @return if Accessor return an Enum Class
*/
public boolean isEnum() {
return type.isEnum();
}
/**
* return the field name
* @return the field name
*/
public String getName() {
return fieldName;
}
/**
* return field Class
* @return field Class
*/
public Class getType() {
return type;
}
/**
* return generics field Type.
* @return generics field Type.
*/
public Type getGenericType() {
return genericType;
}
/**
* @return true if the field can be read or write
*/
public boolean isUsable() {
return field != null || getter != null || setter != null;
}
/**
* @return true if the field can be read
*/
public boolean isReadable() {
return field != null || getter != null;
}
/**
* @return true if the field can be write
*/
public boolean isWritable() {
return field != null || getter != null;
}
/**
* build accessor for a field
*
* @param c the handled class
* @param field the field to access
* @param filter field filter
*
*/
public Accessor(Class c, Field field, FieldFilter filter) {
this.fieldName = field.getName();
int m = field.getModifiers();
if ((m & (Modifier.STATIC | Modifier.TRANSIENT)) > 0)
return;
if ((m & Modifier.PUBLIC) > 0)
this.field = field;
String name = ASMUtil.getSetterName(field.getName());
try {
setter = c.getDeclaredMethod(name, field.getType());
} catch (Exception e) {
}
boolean isBool = field.getType().equals(Boolean.TYPE);
if (isBool) {
name = ASMUtil.getIsName(field.getName());
} else {
name = ASMUtil.getGetterName(field.getName());
}
try {
getter = c.getDeclaredMethod(name);
} catch (Exception e) {
}
if (getter == null && isBool) {
try {
getter = c.getDeclaredMethod(ASMUtil.getGetterName(field.getName()));
} catch (Exception e) {
}
}
if (this.field == null && getter == null && setter == null)
return;
if (getter != null && !filter.canUse(field, getter))
getter = null;
if (setter != null && !filter.canUse(field, setter))
setter = null;
// no access disable
if (getter == null && setter == null && this.field == null)
return;
this.type = field.getType();
this.genericType = field.getGenericType();
}
}