Sérialisation et désérialisation de classes
Bonjour,
Problème courant peut être mais ça fait trop de temps que je m'arrache les cheveux !
J'ai des objets Java à sérialiser/désérialiser mais je ne peux pas modifier la classe de l'objet.
Solution 1
La sérialisation :
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| XMLEncoder encoder = new XMLEncoder(new FileOutputStream("test.xml"));
try {
encoder.writeObject(obj2Xml);
encoder.flush();
}
finally {
encoder.close();
} |
Problème : La classe n'est pas formée comme un JavaBean... donc il me manque du détail !
Solution 2
Voici la sérialisation :
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| XStream xstream = new XStream(new DomDriver());
String xml = xstream.toXML(obj2Xml); |
Résultat de la sérialisation :
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| <com.pack.webservice.common.MaClasse>
<__value>ValeurDeTest</__value>
<type>String</type>
<____hashCodeCalc>false</____hashCodeCalc>
</com.pack.webservice.common.MaClasse> |
Et la désérialisation :
Code:
MaClasse xml2Obj = (MaClasse) xstream.fromXML(xml);
Mais lors de la désérialisation, j'obtiens cette erreur :
Citation:
Envoyé par Erreur
Exception in thread "main" com.thoughtworks.xstream.converters.ConversionException: __hashCodeCalc : __hashCodeCalc
---- Debugging information ----
message : __hashCodeCalc : __hashCodeCalc
path : /com.pack.webservice.common.MaClasse/__hashCodeCalc
cause-message : __hashCodeCalc : __hashCodeCalc
class : com.pack.webservice.common.MaClasse
cause-exception : com.thoughtworks.xstream.mapper.CannotResolveClassException
required-type : com.pack.webservice.common.MaClasse
-------------------------------
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:63)
at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:45)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:46)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:117)
at com.thoughtworks.xstream.core.ReferenceByXPathMarshallingStrategy.unmarshal(ReferenceByXPathMarshallingStrategy.java:29)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:826)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:813)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:761)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:753)
at TestClient.main(TestClient.java:133)
Caused by: com.thoughtworks.xstream.mapper.CannotResolveClassException: __hashCodeCalc : __hashCodeCalc
at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:49)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.XStream11XmlFriendlyMapper.realClass(XStream11XmlFriendlyMapper.java:23)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:72)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:60)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:76)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:26)
at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:34)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.determineType(AbstractReflectionConverter.java:254)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:155)
at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:118)
at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:56)
... 9 more
Voici MaClasse.java :
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| /**
* MaClasse.java
*
* This file was auto-generated from WSDL
* by the Apache Axis 1.2 May 03, 2005 (02:20:24 EDT) WSDL2Java emitter.
*/
package com.pack.webservice.common;
public class MaClasse implements java.io.Serializable, org.apache.axis.encoding.SimpleType {
private java.lang.String _value;
private java.lang.String type; // attribute
private java.lang.Boolean mandatory; // attribute
private java.lang.Boolean readonly; // attribute
public MaClasse() {
}
// Simple Types must have a String constructor
public MaClasse(java.lang.String _value) {
this._value = _value;
}
// Simple Types must have a toString for serializing the value
public java.lang.String toString() {
return _value;
}
/**
* Gets the _value value for this MaClasse.
*
* @return _value
*/
public java.lang.String get_value() {
return _value;
}
/**
* Sets the _value value for this MaClasse.
*
* @param _value
*/
public void set_value(java.lang.String _value) {
this._value = _value;
}
/**
* Gets the type value for this MaClasse.
*
* @return type
*/
public java.lang.String getType() {
return type;
}
/**
* Sets the type value for this MaClasse.
*
* @param type
*/
public void setType(java.lang.String type) {
this.type = type;
}
/**
* Gets the mandatory value for this MaClasse.
*
* @return mandatory
*/
public java.lang.Boolean getMandatory() {
return mandatory;
}
/**
* Sets the mandatory value for this MaClasse.
*
* @param mandatory
*/
public void setMandatory(java.lang.Boolean mandatory) {
this.mandatory = mandatory;
}
/**
* Gets the readonly value for this MaClasse.
*
* @return readonly
*/
public java.lang.Boolean getReadonly() {
return readonly;
}
/**
* Sets the readonly value for this MaClasse.
*
* @param readonly
*/
public void setReadonly(java.lang.Boolean readonly) {
this.readonly = readonly;
}
private java.lang.Object __equalsCalc = null;
public synchronized boolean equals(java.lang.Object obj) {
if (!(obj instanceof MaClasse)) return false;
MaClasse other = (MaClasse) obj;
if (obj == null) return false;
if (this == obj) return true;
if (__equalsCalc != null) {
return (__equalsCalc == obj);
}
__equalsCalc = obj;
boolean _equals;
_equals = true &&
((this._value==null && other.get_value()==null) ||
(this._value!=null &&
this._value.equals(other.get_value()))) &&
((this.type==null && other.getType()==null) ||
(this.type!=null &&
this.type.equals(other.getType()))) &&
((this.mandatory==null && other.getMandatory()==null) ||
(this.mandatory!=null &&
this.mandatory.equals(other.getMandatory()))) &&
((this.readonly==null && other.getReadonly()==null) ||
(this.readonly!=null &&
this.readonly.equals(other.getReadonly())));
__equalsCalc = null;
return _equals;
}
private boolean __hashCodeCalc = false;
public synchronized int hashCode() {
if (__hashCodeCalc) {
return 0;
}
__hashCodeCalc = true;
int _hashCode = 1;
if (get_value() != null) {
_hashCode += get_value().hashCode();
}
if (getType() != null) {
_hashCode += getType().hashCode();
}
if (getMandatory() != null) {
_hashCode += getMandatory().hashCode();
}
if (getReadonly() != null) {
_hashCode += getReadonly().hashCode();
}
__hashCodeCalc = false;
return _hashCode;
}
// Type metadata
private static org.apache.axis.description.TypeDesc typeDesc =
new org.apache.axis.description.TypeDesc(MaClasse.class, true);
static {
typeDesc.setXmlType(new javax.xml.namespace.QName("http://www.url.com/WS/Common", "MaClasse"));
org.apache.axis.description.AttributeDesc attrField = new org.apache.axis.description.AttributeDesc();
attrField.setFieldName("type");
attrField.setXmlName(new javax.xml.namespace.QName("", "type"));
attrField.setXmlType(new javax.xml.namespace.QName("http://www.w3.org/2001/XMLSchema", "string"));
typeDesc.addFieldDesc(attrField);
attrField = new org.apache.axis.description.AttributeDesc();
attrField.setFieldName("mandatory");
attrField.setXmlName(new javax.xml.namespace.QName("", "mandatory"));
attrField.setXmlType(new javax.xml.namespace.QName("http://www.w3.org/2001/XMLSchema", "boolean"));
typeDesc.addFieldDesc(attrField);
attrField = new org.apache.axis.description.AttributeDesc();
attrField.setFieldName("readonly");
attrField.setXmlName(new javax.xml.namespace.QName("", "readonly"));
attrField.setXmlType(new javax.xml.namespace.QName("http://www.w3.org/2001/XMLSchema", "boolean"));
typeDesc.addFieldDesc(attrField);
org.apache.axis.description.ElementDesc elemField = new org.apache.axis.description.ElementDesc();
elemField.setFieldName("_value");
elemField.setXmlName(new javax.xml.namespace.QName("", "_value"));
elemField.setXmlType(new javax.xml.namespace.QName("http://www.w3.org/2001/XMLSchema", "string"));
elemField.setNillable(false);
typeDesc.addFieldDesc(elemField);
}
/**
* Return type metadata object
*/
public static org.apache.axis.description.TypeDesc getTypeDesc() {
return typeDesc;
}
/**
* Get Custom Serializer
*/
public static org.apache.axis.encoding.Serializer getSerializer(
java.lang.String mechType,
java.lang.Class _javaType,
javax.xml.namespace.QName _xmlType) {
return
new org.apache.axis.encoding.ser.SimpleSerializer(
_javaType, _xmlType, typeDesc);
}
/**
* Get Custom Deserializer
*/
public static org.apache.axis.encoding.Deserializer getDeserializer(
java.lang.String mechType,
java.lang.Class _javaType,
javax.xml.namespace.QName _xmlType) {
return
new org.apache.axis.encoding.ser.SimpleDeserializer(
_javaType, _xmlType, typeDesc);
}
} |
Savez-vous comment je peux résoudre cette erreur ?
Ou bien de quel manière je peux sérialiser et désérialiser mes objets complètement malgré qu'ils ne soient pas définis comme des JavaBeans ? (Le changement de librairies pour faire cette manipulation ne me dérange pas).
