Private bisa di"paksa" bisa dibaca/tulis dari luar koq. http://tutorials.jenkov.com/java-reflection/private-fields-and-methods.html
Framework dependency injection yang inject to field juga biasanya gak masalah walopun fieldnya private (di Guice sering gini koq, di EJB/JPA pun kayaknya bisa). <http://tutorials.jenkov.com/java-reflection/private-fields-and-methods.html> -Kurniady 2010/5/2 Adelwin Handoyo <adel...@gmail.com> > > > Aahh... > Disini guna nya convention POJO. > Field nya.. As in ID, NAMA, dll ituh tuh semua private... > Sesuai dasar nya java... Private ituh kagak bisa di baca dari luar... > Jadi walopun pake reflection pun kagak bisa di baca... > Reflection yang Class.getFields() itu tuh Cuma bisa untuk retrieve public > fields. > Hahaha.. G juga pernah ketipu sama ginian... > > Untuk yang satu lagi tadi... PropertyUtils nya ituh dari package mana? > Gue kagak nemu malah... > > As I said before.. Ini guna nya POJO Convention... > Liat method ini > > > public static final String GETTER_METHOD_PREFIX = "get"; public > static final String SETTER_METHOD_PREFIX = "set"; public static final > String METHOD_SPLICE_BEGIN_INDEX = "3"; > public static final String getFieldFromMethod(Method method) { > String retVal = new String(); retVal = > method.getName().substring(Integer.parseInt(METHOD_SPLICE_BEGIN_INDEX)); > return retVal; } public static final List extractFields(Class > clazz) { List retVal = new ArrayList(); Method[] methods = > clazz.getMethods(); Method method; String methodName; > for (int i = 0; i < methods.length; i++) { method = > methods[i]; if > (method.getName().startsWith(GETTER_METHOD_PREFIX)) { > methodName = BeanUtil.getFieldFromMethod(method); > if (!retVal.contains(methodName)) { > retVal.add(methodName); } > } } return retVal; } public > static final List<String> extractBeanFields(Class clazz) { List > retVal = BeanUtil.extractFields(clazz); List objField = > BeanUtil.extractFields(Object.class); retVal.removeAll(objField); > return retVal; } > Ini g barusan buat... agak2 penasaran soal nya tadi. > As you can see.. Bisa jalan sampe jdk1.4 > Kalo udah dapet list of string, ntar kita baru bisa begini. > > BeanWrapper student = BeanWrapperImpl(new Student()); > Object value = student.getPropertyValue(“name”); > student.setPropertyValue(“name”, “Adelwin”); > > Tapi setelah g coba2 lagi... > Ada cara yang lebih elegant... > > public static final List getFields(Class clazz) throws > InstantiationException, IllegalAccessException { List fields = new > ArrayList(); BeanWrapper clazzWrapper = new > BeanWrapperImpl(clazz.newInstance()); PropertyDescriptor[] > propertyDescriptors = clazzWrapper.getPropertyDescriptors(); for > (PropertyDescriptor propertyDescriptor : propertyDescriptors) { > fields.add(propertyDescriptor.getName()); } return > fields; } > > *Adelwin Handoyo > *- adel...@gmail.com - > Sent from my Mac > > > ------------------------------ > *From: *Deny Prasetyo <jas...@gmail.com> > *Reply-To: *JUG-Indonesia <jug-indonesia@yahoogroups.com> > *Date: *Sun, 02 May 2010 12:48:29 +0700 > *To: *JUG-Indonesia <jug-indonesia@yahoogroups.com> > *Subject: *Re: [JUG-Indonesia] tanya baca property di POJO > > > > > Pakai Reflection. > > http://java.sun.com/docs/books/tutorial/reflect/index.html > > On 5/2/2010 12:35 PM, Wiyanto Ngasinur wrote: > > > > > PropertyUtils.getPropertyDescriptors([nama class]) > > > > > return nya PropertyDescriptor[], tinggal di loop n panggil getName() > > > > > > > > thanks, > > W > > > > 2010/5/2 ivan prasetia <iphan_zeke_...@yahoo.co.id> > > > > > > > > I all.. > > mau tanya bgm cara baca property2 di class pojo pakai class lain > misal ada class Person berisi > private String id; > private String name; > private String address; > > nah bagaimana cara mendapatkan property2 nya dr class lain > misal ada method public List getPropertyPOJO(Class class) > misal kita kasih parameternya memakai class Person > List tersebut berisi property2 pojo nya id,name,address > > Thanks.... > > Y! iphan_zeke_boy > > > > > > > > > > > > > > -- > Deny Prasetyo > Janabadra University Lecturer > http://www.janabadra.ac.id > http://jasoet.wordpress.com > www.twitter.com/jasoet <http://www.twitter.com/jasoet> > YM: jasoet87 > ------- > > > > > >
