Description
Sets a property on an entity based on its name.
License
Open Source License
Parameter
| Parameter | Description |
|---|
| entity | The entity to update. |
| propertyName | The property name. |
| propertyValue | The property value. |
Exception
| Parameter | Description |
|---|
| Exception | an exception |
Declaration
public static void invokeSetter(Object entity, String propertyName, Object propertyValue) throws Exception
Method Source Code
//package com.java2s;
/**/* ww w . ja v a2 s.c o m*/
* Copyright 2005-2014 Restlet
*
* The contents of this file are subject to the terms of one of the following
* open source licenses: Apache 2.0 or or EPL 1.0 (the "Licenses"). You can
* select the license that you prefer but you may not use this file except in
* compliance with one of these Licenses.
*
* You can obtain a copy of the Apache 2.0 license at
* http://www.opensource.org/licenses/apache-2.0
*
* You can obtain a copy of the EPL 1.0 license at
* http://www.opensource.org/licenses/eclipse-1.0
*
* See the Licenses for the specific language governing permissions and
* limitations under the Licenses.
*
* Alternatively, you can obtain a royalty free commercial license with less
* limitations, transferable or non-transferable, directly at
* http://restlet.com/products/restlet-framework
*
* Restlet is a registered trademark of Restlet S.A.S.
*/
import java.lang.reflect.Field;
import java.lang.reflect.Method;
public class Main {
/**
* Sets a property on an entity based on its name.
*
* @param entity
* The entity to update.
* @param propertyName
* The property name.
* @param propertyValue
* The property value.
* @throws Exception
*/
public static void invokeSetter(Object entity, String propertyName, Object propertyValue) throws Exception {
if (propertyName != null && entity != null) {
propertyName = propertyName.replaceAll("/", ".");
Object o = entity;
String pty = propertyName;
String[] strings = propertyName.split("\\.");
if (strings.length > 1) {
for (int i = 0; i < strings.length - 1; i++) {
String string = strings[i];
Object p = invokeGetter(o, string);
if (p == null) {
// Try to instantiate it
Field[] fields = o.getClass().getDeclaredFields();
for (Field field : fields) {
if (field.getName().equalsIgnoreCase(string)) {
p = field.getType().newInstance();
break;
}
}
}
o = p;
}
pty = strings[strings.length - 1];
}
String setterName = null;
char firstLetter = pty.charAt(0);
if (Character.isLowerCase(firstLetter)) {
setterName = "set" + Character.toUpperCase(firstLetter) + pty.substring(1);
} else {
setterName = "set" + pty;
}
Method setter = null;
Method method;
for (int i = 0; (setter == null) && (i < o.getClass().getDeclaredMethods().length); i++) {
method = o.getClass().getDeclaredMethods()[i];
if (method.getName().equals(setterName)) {
if ((method.getParameterTypes() != null) && (method.getParameterTypes().length == 1)) {
setter = method;
}
}
}
if (setter != null) {
setter.invoke(o, propertyValue);
}
}
}
/**
* Sets a property on an entity based on its name.
*
* @param entity
* The entity to update.
* @param propertyName
* The property name.
* @param propertyValue
* The property value.
* @param propertyType
* The property data type.
* @throws Exception
*/
public static void invokeSetter(Object entity, String propertyName, String propertyValue, String propertyType)
throws Exception {
if (propertyName != null) {
propertyName = propertyName.replaceAll("/", ".");
Object o = entity;
String pty = propertyName;
String[] strings = propertyName.split("\\.");
if (strings.length > 1) {
for (int i = 0; i < strings.length - 1; i++) {
String string = strings[i];
Object p = invokeGetter(o, string);
if (p == null) {
// Try to instantiate it
Field[] fields = o.getClass().getDeclaredFields();
for (Field field : fields) {
if (field.getName().equalsIgnoreCase(string)) {
p = field.getType().newInstance();
break;
}
}
}
o = p;
}
pty = strings[strings.length - 1];
}
String setterName = null;
char firstLetter = propertyName.charAt(0);
if (Character.isLowerCase(firstLetter)) {
setterName = "set" + Character.toUpperCase(firstLetter) + pty.substring(1);
} else {
setterName = "set" + pty;
}
Method setter = null;
Object setterParameter = null;
Method method;
for (int i = 0; (setter == null) && (i < o.getClass().getDeclaredMethods().length); i++) {
method = o.getClass().getDeclaredMethods()[i];
if (method.getName().equals(setterName)) {
if ((method.getParameterTypes() != null) && (method.getParameterTypes().length == 1)) {
Class<?> parameterType = method.getParameterTypes()[0];
if (String.class.equals(parameterType)) {
setterParameter = propertyValue;
setter = method;
} else if (Integer.class.equals(parameterType)) {
setterParameter = Integer.valueOf(propertyValue);
setter = method;
} else if (int.class.equals(parameterType)) {
setterParameter = Integer.valueOf(propertyValue);
setter = method;
}
}
}
}
if (setter != null) {
setter.invoke(o, setterParameter);
}
}
}
/**
* Returns the value of a property on an entity based on its name.
*
* @param entity
* The entity.
* @param propertyName
* The property name.
* @return The value of a property for an entity.
* @throws Exception
*/
public static Object invokeGetter(Object entity, String propertyName) throws Exception {
Object result = null;
if (propertyName != null && entity != null) {
propertyName = propertyName.replaceAll("/", ".");
Object o = entity;
String pty = propertyName;
int index = propertyName.indexOf(".");
if (index != -1) {
o = invokeGetter(entity, propertyName.substring(0, index));
pty = propertyName.substring(index + 1);
result = invokeGetter(o, pty);
} else {
String getterName = null;
char firstLetter = propertyName.charAt(0);
if (Character.isLowerCase(firstLetter)) {
getterName = "get" + Character.toUpperCase(firstLetter) + pty.substring(1);
} else {
getterName = "get" + pty;
}
Method getter = null;
Method method;
for (int i = 0; (getter == null) && (i < entity.getClass().getDeclaredMethods().length); i++) {
method = entity.getClass().getDeclaredMethods()[i];
if (method.getName().equals(getterName)) {
getter = method;
}
}
if (getter != null) {
result = getter.invoke(o);
}
}
}
return result;
}
}
Related
- invokeSetter(final Method setter, final Object target, Object value)
- invokeSetter(Method setter, Object obj, String fieldName, Object value)
- invokeSetter(Method setter, Object obj, String value)
- invokeSetter(Method setter, Object object, Object propValue)
- invokeSetter(Object o, String name, Class value1clazz, Object value)
- invokeSetter(Object o, String name, Object value, Class clazz)
- invokeSetterMethod(Method method, Object oBean, Object oValue)
- invokeSetters(final T instance, final Map vars)