Re: [Simple-support] Custom HashMap serialization/deserialization - Help
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Re: [Simple-support] Custom HashMap serialization/deserialization - Help
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From: Simon B. <sim...@if...> - 2012-05-29 05:55:35
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Hi Miguel,
Basically this does it:
@Root(name="Courses")
public class Courses {
@ElementList(entry="Course",type=com.simpleserializer.model.Course.class,
inline=true)
Collection<Course> getCourses() {
return new ArrayList<Course>(this.courses.values());
}
@ElementList(entry="Course",type=com.simpleserializer.model.Course.class,
inline=true)
void setCourses(final java.util.Collection<Course> courses) {
for(Course course: courses) {
this.put(course.getId(), course);
}
}
private final HashMap<String, Course> courses = new HashMap<String,
Course>();
public void put(final String courseId, final Course course) {
this.courses.put(course.getId(), course);
}
}
If you want to solve a similar problem, have a look to
http://simple.sourceforge.net/download/stream/doc/tutorial/tutorial.php#inli
ne
http://simple.sourceforge.net/download/stream/doc/tutorial/tutorial.php#java
bean
http://simple.sourceforge.net/download/stream/doc/tutorial/tutorial.php#over
ride
I'm sure the explanations and the examples will greatly help.
Best Regards
Simon
-----Ursprüngliche Nachricht-----
Von: Miguel Ángel Martínez Fernández [mailto:mig...@gm...]
Gesendet: Montag, 28. Mai 2012 23:28
An: Simon Brodt
Cc: sim...@li...
Betreff: Re: [Simple-support] Custom HashMap serialization/deserialization -
Help
Hi Simon,
Sorry but it didn't work. I get the following exception:
Can not construct inner class java.util.HashMap$Values
I have also added a ZIP file wth an extract of the project just in
case it may help.
Thanks again for your support!
Miguel Ángel
On Mon, May 28, 2012 at 8:53 PM, Simon Brodt <sim...@if...> wrote:
> Hi Miguel,
>
> Sorry, I was a little bit to fast. Didn't realize the Map:
>
> So new try:
>
> public class Courses {
>
@ElementList(entry=Course,type=com.simpleserializer.model.Course.class,
> inline=true)
> java.util.Collection<Course> getCourses(){
> return courses.values();
> }
>
> @ElementList(entry=Course,type=com.simpleserializer.model.Course.class,
> inline=true)
> void setCourses(java.util.Collection<Course> courses){
> for(Course course: courses){
> this.put(course);
> }
> }
>
> private HashMap<String, Course> courses = new
> HashMap<String, Course>();
>
> public void put(Course course)
> {
> this.courses.put(course.getId(), course);
> }
>
> }
>
>
>> Hi Simon!
>>
>> Thank you for your quick answer.
>>
>> Unfortunately it did not work. When I try this:
>>
>> // Retrieving courses from ddbb
>> Courses courses = CoursesDAO.get(token, connection);
>>
>> // Serialization to xml
>> String xml = Serializer.toXml(courses);
>>
>> It raises the following exception:
>>
>> java.util.HashMap cannot be cast to java.util.Collection
>>
>> The rest of the code below:
>>
>> Serializer.java:
>>
>> package com.simpleserializer.util;
>>
>> import java.io.StringWriter;
>>
>> import org.simpleframework.xml.core.Persister;
>>
>> public class Serializer {
>> public static String toXml(Object source) {
>> StringWriter response = new StringWriter();
>>
>> try {
>> new Persister().write(source, response);
>> } catch (Exception e) {
>> e1.printStackTrace();
>> }
>>
>> return response.toString();
>> }
>> }
>>
>>
>> On Mon, May 28, 2012 at 12:12 PM, Simon Brodt <sim...@if...>
>> wrote:
>>> Hi Miguel,
>>>
>>>
>>>
>>> Try the following:
>>>
>>>
>>>
>>> Course.java:
>>>
>>> package com.simpleserializer.model;
>>>
>>>
>>>
>>> import org.simpleframework.xml.Attribute;
>>>
>>>
>>>
>>> @Root(name=Course)
>>>
>>> public class Course {
>>>
>>> @Attribute private String id;
>>>
>>> @Attribute private String name;
>>>
>>>
>>>
>>> public Course(String id, String name) {
>>>
>>> this.setId(id);
>>>
>>> this.setName(name);
>>>
>>> }
>>>
>>>
>>>
>>> public String getId() {
>>>
>>> return this.id;
>>>
>>> }
>>>
>>>
>>>
>>> public void setId(String id) {
>>>
>>> this.id = id;
>>>
>>> }
>>>
>>>
>>>
>>> public String getName() {
>>>
>>> return this.name;
>>>
>>> }
>>>
>>>
>>>
>>> public void setName(String name) {
>>>
>>> this.name = name;
>>>
>>> }
>>>
>>> }
>>>
>>>
>>>
>>> Course2.java:
>>>
>>> package com.simpleserializer.model;
>>>
>>>
>>>
>>> import java.util.HashMap;
>>>
>>>
>>>
>>> @Root(name=Courses)
>>>
>>> public class Courses {
>>>
>>>
>>>
>>> @ElementList(entry=Course,type=
>>> com.simpleserializer.model.Course.class, inline=true)
>>>
>>> private HashMap<String, Course> courses = new
>>> HashMap<String, Course>();
>>>
>>>
>>>
>>> public void put(String courseId, Course course)
>>>
>>> {
>>>
>>> this.courses.put(courseId, course);
>>>
>>> }
>>>
>>> }
>>>
>>>
>>>
>>> Von: Miguel Ángel Martínez Fernández [mailto:mig...@gm...]
>>> Gesendet: Montag, 28. Mai 2012 01:35
>>> An: sim...@li...
>>> Betreff: [Simple-support] Custom HashMap serialization/deserialization -
>>> Help
>>>
>>>
>>>
>>> Hi,
>>>
>>>
>>>
>>> I am trying to serialize (and deserialize) two Java clases
>>> (Courses.java
>>> and Couse.Java) in order to get the following XML:
>>>
>>>
>>>
>>> <Courses>
>>>
>>> <Course id="course01" name="My first course"/>
>>>
>>> <Course id="course02" name="My second course"/>
>>>
>>> </Courses>
>>>
>>>
>>>
>>> Course.java:
>>>
>>> package com.simpleserializer.model;
>>>
>>>
>>>
>>> import org.simpleframework.xml.Attribute;
>>>
>>>
>>>
>>> public class Course {
>>>
>>> @Attribute private String id;
>>>
>>> @Attribute private String name;
>>>
>>>
>>>
>>> public Course(String id, String name) {
>>>
>>> this.setId(id);
>>>
>>> this.setName(name);
>>>
>>> }
>>>
>>>
>>>
>>> public String getId() {
>>>
>>> return this.id;
>>>
>>> }
>>>
>>>
>>>
>>> public void setId(String id) {
>>>
>>> this.id = id;
>>>
>>> }
>>>
>>>
>>>
>>> public String getName() {
>>>
>>> return this.name;
>>>
>>> }
>>>
>>>
>>>
>>> public void setName(String name) {
>>>
>>> this.name = name;
>>>
>>> }
>>>
>>> }
>>>
>>>
>>>
>>> Course2.java:
>>>
>>> package com.simpleserializer.model;
>>>
>>>
>>>
>>> import java.util.HashMap;
>>>
>>>
>>>
>>> public class Courses {
>>>
>>> private HashMap<String, Course> courses = new
>>> HashMap<String,
>>> Course>();
>>>
>>>
>>>
>>> public void put(String courseId, Course course)
>>>
>>> {
>>>
>>> this.courses.put(courseId, course);
>>>
>>> }
>>>
>>> }
>>>
>>>
>>>
>>> An example about how these clases are used is:
>>>
>>>
>>>
>>> Courses courses = new Courses();
>>>
>>>
>>>
>>> Course course1 = new Course("course01", "My first course");
>>>
>>> Course course2 = new Course("course02", "My second course");
>>>
>>>
>>>
>>> courses.put(course1.getId(), course1);
>>>
>>> courses.put(course2.getId(), course2);
>>>
>>>
>>>
>>>
>>>
>>> Could you please help me? I would really appreciate it!
>>>
>>>
>>>
>>> Thanks!
>>
>
>
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