How get method source code from a class

Question

We developed a model generator tool that get a �base model� as an input and generated rich model.
The �base model� is collection of POJO classes and the model generator analyzed the base model (with reflection) and with �ftl� generates �rich model� , which is the base model with additional annotations and logics.
Some classes in the �base-model� may contain additional method and I need to copy those methods as they are to the �rich-model� generated sources.
I need a way to copy those methods from the base-model (I work on it with reflection, but I have also the source) to the rich-model.
I think to do this by decompile. Are there any better way?
Is there any simple utility that decompile method?
Thank you

Answer 1

There is a big differnet between the input and the output.
for example:
input:
@Key(indexs = { "name" })
@SuppressWarnings(value = { "serial", "unused" })
@Observers(observers = { @Observer(type = ObserverType.INSTANCE_INHERITANCE) })
public class Device extends Segment {
     // ********************** Class Members: ********************** //
     private DeviceTypeEnum type;
     protected DeviceSetup deviceSetup;
     protected Networking networking;output:
* model-project class. generated by ModelGenerator. *
@Entity
@Key(indexs={"name"})
@NamedQueries(value={@NamedQuery(name="Device.FilterByIndex", query="SELECT d FROM Device d WHERE d.name=:name")})
@Observers(observers={@Observer(type=ObserverType.INSTANCE_INHERITANCE)})
public class Device extends Segment implements ObservableIfc
     private static final long serialVersionUID = -7782418163128836178L;
    // ********************** Class Members: ********************** //
    @Column(name="type_column")
    @Type(type="com.radware.insite.modelhelpers.utils.GenericEnumUserType", parameters = {@Parameter(name = "enumClass" , value = "com.radware.insite.modelhelpers.constants.ImConstants$DeviceTypeEnum")})
    private DeviceTypeEnum type;
    private FieldMetadata typeMD = new RefMetadata();
    @OneToOne(cascade={CascadeType.PERSIST, CascadeType.REFRESH, CascadeType.REMOVE}, fetch=FetchType.LAZY)
    @JoinColumn(name="dev_setup_2_dev")
    protected DeviceSetup deviceSetup = new DeviceSetup();
    private FieldMetadata deviceSetupMD = new RefMetadata();