xml - Generate Equals und HashCode with jaxb2-maven-plugin Version 2.2 -

we use jaxb2-maven-plugin (version 2.2) , generate equal , hashcode method each jaxbobject. have alreade binding.xjb file configure anything.

is there way generate methods?

if try add arguments -xequals -xhashcode, following exception: unbekannter parameter -xequals -xhashcode

configuration:

<configuration> <arguments>-xequals -xhashcode</arguments> </configuration> 

thank you!

you can generate hashcode , equals jaxb2 basics plugins:

<project ...>     ...     <build>         <plugins>             ...             <plugin>                 <groupid>org.jvnet.jaxb2.maven2</groupid>                 <artifactid>maven-jaxb2-plugin</artifactid>                 <executions>                     <execution>                         <goals>                             <goal>generate</goal>                         </goals>                     </execution>                 </executions>                 <configuration>                     <extension>true</extension>                     <args>                         <arg>-xsimpleequals</arg>                         <arg>-xsimplehashcode</arg>                     </args>                     <plugins>                         <plugin>                             <groupid>org.jvnet.jaxb2_commons</groupid>                             <artifactid>jaxb2-basics</artifactid>                             <version>...</version>                         </plugin>                     </plugins>                 </configuration>             </plugin>         </plugins>     </build>     ... </project> 

this generate deep reflection-free runtime dependencies-free equals , hashcode methods:

public boolean equals(object object) {     if ((object == null)||(this.getclass()!= object.getclass())) {         return false;     }     if (this == object) {         return true;     }     final purchaseordertype = ((purchaseordertype) object);     {         usaddress leftshipto;         leftshipto = this.getshipto();         usaddress rightshipto;         rightshipto = that.getshipto();         if (this.shipto!= null) {             if (that.shipto!= null) {                 if (!leftshipto.equals(rightshipto)) {                     return false;                 }             } else {                 return false;             }         } else {             if (that.shipto!= null) {                 return false;             }         }     }     // ...     return true; }  public int hashcode() {     int currenthashcode = 1;     {         currenthashcode = (currenthashcode* 31);         usaddress theshipto;         theshipto = this.getshipto();         if (this.shipto!= null) {             currenthashcode += theshipto.hashcode();         }     }     // ...     return currenthashcode; } 

i prefer -xequals , -xhashcode generate "strategic" methods. "strategic" in sense these method use passed strategy equality or hash code calculation:

public boolean equals(object object) {     final equalsstrategy2 strategy = jaxbequalsstrategy.instance2;     return equals(null, null, object, strategy); }  public boolean equals(objectlocator thislocator, objectlocator thatlocator, object object, equalsstrategy2 strategy) {     if ((object == null)||(this.getclass()!= object.getclass())) {         return false;     }     if (this == object) {         return true;     }     final purchaseordertype = ((purchaseordertype) object);     {         usaddress lhsshipto;         lhsshipto = this.getshipto();         usaddress rhsshipto;         rhsshipto = that.getshipto();         if (!strategy.equals(locatorutils.property(thislocator, "shipto", lhsshipto), locatorutils.property(thatlocator, "shipto", rhsshipto), lhsshipto, rhsshipto, (this.shipto!= null), (that.shipto!= null))) {             return false;         }     }     // ...     return true; }  public int hashcode() {     final hashcodestrategy2 strategy = jaxbhashcodestrategy.instance2;     return this.hashcode(null, strategy); }  public int hashcode(objectlocator locator, hashcodestrategy2 strategy) {     int currenthashcode = 1;     {         usaddress theshipto;         theshipto = this.getshipto();         currenthashcode = strategy.hashcode(locatorutils.property(locator, "shipto", theshipto), currenthashcode, theshipto, (this.shipto!= null));     }     // ...     return currenthashcode; } 

strategic methods quite cool because can customize equality/hash code calculation - instance log structure differ. comes price of runtime dependency.

disclaimer: i'm author of jaxb2 basics.