Databases
StackOverflow2013
Postsdbo
POJava Bean Persistence with XMLEncoder
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POJava Bean Persistence with XMLEncoder
    primarykey
    data
    text
    <p>I've written a bean class containing a HashMultiMap (from the Guava library). I would like to XML encode the bean using the JRE's XMLEncoder. Using a custom PersistenceDelegate I've successfully written the bean to file. However, when I attempt to deserialize the XML I get the exception: </p> <p><code>java.lang.NoSuchMethodException: &lt;unbound&gt;=HashMultimap.put("pz1", "pz2")</code> </p> <p>What am I doing wrong? </p> <pre><code>// create the bean SomeBean sb = new SomeBean(); // add some data HashMultimap&lt;String, String&gt; stateMap = HashMultimap.create(); stateMap.put("pz1", "pz2"); stateMap.put("pz3", "pz4"); sb.setStateMap(stateMap); // encode as xml FileOutputStream os = new FileOutputStream("myXMLFile.xml"); XMLEncoder encoder = new XMLEncoder(os); encoder.setPersistenceDelegate(HashMultimap.class, new CustomPersistenceDelegate()); encoder.writeObject(sb); // decode the xml FileInputStream is = new FileInputStream("myXMLFile.xml"); XMLDecoder decoder = new XMLDecoder(is); Object deSerializedObject = decoder.readObject(); class CustomPersistenceDelegate extends DefaultPersistenceDelegate { protected Expression instantiate(Object oldInstance, Encoder out) { return new Expression(oldInstance, oldInstance.getClass(), "create", null); } protected void initialize(Class&lt;?&gt; type, Object oldInstance, Object newInstance, Encoder out) { super.initialize(type, oldInstance, newInstance, out); com.google.common.collect.HashMultimap&lt;String, String&gt; m = (com.google.common.collect.HashMultimap) oldInstance; for (Map.Entry&lt;String, String&gt; entry : m.entries()) { out.writeStatement(new Statement(oldInstance, "put", new Object[] { entry.getKey(), entry.getValue() })); } } } public class SomeBean { private HashMultimap&lt;String, String&gt; stateMap; public HashMultimap&lt;String, String&gt; getStateMap() { return stateMap; } public void setStateMap(HashMultimap&lt;String, String&gt; stateMap) { this.stateMap = stateMap; } } </code></pre>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USD. Wonnink
    1. USjavacavaj
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POJava Bean Persistence with XMLEncoder
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    2. VO
      singulars
      1. POJava Bean Persistence with XMLEncoder
      1. This table or related slice is empty.
      1. VTApproveEditSuggestion
    3. VO
      singulars
      1. POJava Bean Persistence with XMLEncoder
      1. This table or related slice is empty.
      1. VTUpMod
    1. COI took your code, and put it into a Junit test, and had no problem. It worked fine with no Exception. Can you please post the full StackTrace? See [here](http://txtup.net/Lndut)
      singulars
      1. POJava Bean Persistence with XMLEncoder
      1. USSam Goldberg
    2. COSam I don't get a full stack trace. Instead, the debug window shows the following: java.lang.Exception: Encoder: discarding statement HashMultimap.put("pz3", "pz4"); Continuing ... java.lang.Exception: Encoder: discarding statement HashMultimap.put("pz1", "pz2"); Continuing ... java.lang.NoSuchMethodException: <unbound>=HashMultimap.put("pz3", "pz4"); Continuing ... java.lang.NoSuchMethodException: <unbound>=HashMultimap.put("pz1", "pz2"); Continuing ...
      singulars
      1. POJava Bean Persistence with XMLEncoder
      1. USjavacavaj
    3. COSam were you able to decode the object? The map is empty when I decode it.
      singulars
      1. POJava Bean Persistence with XMLEncoder
      1. USjavacavaj
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload