org.eclipse.persistence.descriptors.WrapperPolicy java code examples

/**
 * Wrap the object if required.
 * This is used for the wrapper policy support and EJB.
 */
public Object wrapObject(Object implementation, AbstractSession session) {
  if (!this.hasWrapperPolicy) {
    return implementation;
  }
  if (implementation == null) {
    return null;
  }
  // PERF: Using direct variable access.
  
  // Check if already wrapped.
  if ((!this.descriptor.hasWrapperPolicy()) || this.descriptor.getWrapperPolicy().isWrapped(implementation)) {
    return implementation;
  }
  // Allow for inheritance, the concrete wrapper must always be used.
  if (this.descriptor.hasInheritance() && this.descriptor.getInheritancePolicy().hasChildren() && (implementation.getClass() != this.descriptor.getJavaClass())) {
    ClassDescriptor descriptor = session.getDescriptor(implementation);
    if (descriptor != this.descriptor) {
      return descriptor.getObjectBuilder().wrapObject(implementation, session);
    }
  }
  return this.descriptor.getWrapperPolicy().wrapObject(implementation, session);
}

/**
 * ADVANCED:
 * Sets the WrapperPolicy for this descriptor.
 * This advanced feature can be used to wrap objects with other classes such as CORBA TIE objects or EJBs.
 */
public void setWrapperPolicy(WrapperPolicy wrapperPolicy) {
  this.wrapperPolicy = wrapperPolicy;
  // For bug 2766379 must be able to set the wrapper policy back to default
  // which is null.
  if (wrapperPolicy != null) {
    wrapperPolicy.setDescriptor(this);
  }
  getObjectBuilder().setHasWrapperPolicy(wrapperPolicy != null);
}

/**
 * Unwrap the object if required.
 * This is used for the wrapper policy support and EJB.
 */
public Object unwrapObject(Object proxy, AbstractSession session) {
  if (!this.hasWrapperPolicy) {
    return proxy;
  }
  if (proxy == null) {
    return null;
  }
  // PERF: Using direct variable access.
  // Check if already unwrapped.
  if ((!this.descriptor.hasWrapperPolicy()) || (this.descriptor.getJavaClass() == proxy.getClass()) || (!this.descriptor.getWrapperPolicy().isWrapped(proxy))) {
    if (session.getProject().hasProxyIndirection()) {
      //Bug#3947714  Check and trigger the proxy here
      return ProxyIndirectionPolicy.getValueFromProxy(proxy);
    }
    return proxy;
  }
  // Allow for inheritance, the concrete wrapper must always be used.
  if (this.descriptor.hasInheritance() && (this.descriptor.getInheritancePolicy().hasChildren())) {
    ClassDescriptor descriptor = session.getDescriptor(proxy);
    if (descriptor != this.descriptor) {
      return descriptor.getObjectBuilder().unwrapObject(proxy, session);
    }
  }
  return this.descriptor.getWrapperPolicy().unwrapObject(proxy, session);        
}

  Object object = cp.next(iterator, cloningSession);
  if (mapping.getReferenceDescriptor().hasWrapperPolicy()) {
    object = mapping.getReferenceDescriptor().getWrapperPolicy().unwrapObject(object, cloningSession);
objectToLock = mapping.getReferenceDescriptor().getWrapperPolicy().unwrapObject(objectToLock, cloningSession);

if (this.descriptor.hasWrapperPolicy() && this.descriptor.getWrapperPolicy().isWrapped(clone)) {

getWrapperPolicy().initialize(session);

/**
 * Unwrap the object if required.
 * This is used for the wrapper policy support and EJB.
 */
public Object unwrapObject(Object proxy, AbstractSession session) {
  if (!this.hasWrapperPolicy) {
    return proxy;
  }
  if (proxy == null) {
    return null;
  }
  // PERF: Using direct variable access.
  // Check if already unwrapped.
  if ((!this.descriptor.hasWrapperPolicy()) || (this.descriptor.getJavaClass() == proxy.getClass()) || (!this.descriptor.getWrapperPolicy().isWrapped(proxy))) {
    if (session.getProject().hasProxyIndirection()) {
      //Bug#3947714  Check and trigger the proxy here
      return ProxyIndirectionPolicy.getValueFromProxy(proxy);
    }
    return proxy;
  }
  // Allow for inheritance, the concrete wrapper must always be used.
  if (this.descriptor.hasInheritance() && (this.descriptor.getInheritancePolicy().hasChildren())) {
    ClassDescriptor descriptor = session.getDescriptor(proxy);
    if (descriptor != this.descriptor) {
      return descriptor.getObjectBuilder().unwrapObject(proxy, session);
    }
  }
  return this.descriptor.getWrapperPolicy().unwrapObject(proxy, session);
}

  Object object = cp.next(iterator, cloningSession);
  if (mapping.getReferenceDescriptor().hasWrapperPolicy()) {
    object = mapping.getReferenceDescriptor().getWrapperPolicy().unwrapObject(object, cloningSession);
objectToLock = mapping.getReferenceDescriptor().getWrapperPolicy().unwrapObject(objectToLock, cloningSession);

if (this.descriptor.hasWrapperPolicy() && this.descriptor.getWrapperPolicy().isWrapped(clone)) {

getWrapperPolicy().initialize(session);

/**
 * Wrap the object if required.
 * This is used for the wrapper policy support and EJB.
 */
public Object wrapObject(Object implementation, AbstractSession session) {
  if (!this.hasWrapperPolicy) {
    return implementation;
  }
  if (implementation == null) {
    return null;
  }
  // PERF: Using direct variable access.
  // Check if already wrapped.
  if ((!this.descriptor.hasWrapperPolicy()) || this.descriptor.getWrapperPolicy().isWrapped(implementation)) {
    return implementation;
  }
  // Allow for inheritance, the concrete wrapper must always be used.
  if (this.descriptor.hasInheritance() && this.descriptor.getInheritancePolicy().hasChildren() && (implementation.getClass() != this.descriptor.getJavaClass())) {
    ClassDescriptor descriptor = session.getDescriptor(implementation);
    if (descriptor != this.descriptor) {
      return descriptor.getObjectBuilder().wrapObject(implementation, session);
    }
  }
  return this.descriptor.getWrapperPolicy().wrapObject(implementation, session);
}

/**
 * Unwrap the object if required.
 * This is used for the wrapper policy support and EJB.
 */
public Object unwrapObject(Object proxy, AbstractSession session) {
  if (!this.hasWrapperPolicy) {
    return proxy;
  }
  if (proxy == null) {
    return null;
  }
  // PERF: Using direct variable access.
  // Check if already unwrapped.
  if ((!this.descriptor.hasWrapperPolicy()) || (this.descriptor.getJavaClass() == proxy.getClass()) || (!this.descriptor.getWrapperPolicy().isWrapped(proxy))) {
    if (session.getProject().hasProxyIndirection()) {
      //Bug#3947714  Check and trigger the proxy here
      return ProxyIndirectionPolicy.getValueFromProxy(proxy);
    }
    return proxy;
  }
  // Allow for inheritance, the concrete wrapper must always be used.
  if (this.descriptor.hasInheritance() && (this.descriptor.getInheritancePolicy().hasChildren())) {
    ClassDescriptor descriptor = session.getDescriptor(proxy);
    if (descriptor != this.descriptor) {
      return descriptor.getObjectBuilder().unwrapObject(proxy, session);
    }
  }
  return this.descriptor.getWrapperPolicy().unwrapObject(proxy, session);        
}

  Object object = cp.next(iterator, session);
  if (mapping.getReferenceDescriptor().hasWrapperPolicy()) {
    object = mapping.getReferenceDescriptor().getWrapperPolicy().unwrapObject(object, session);
objectToLock = mapping.getReferenceDescriptor().getWrapperPolicy().unwrapObject(objectToLock, session);

/**
 * ADVANCED:
 * Sets the WrapperPolicy for this descriptor.
 * This advanced feature can be used to wrap objects with other classes such as CORBA TIE objects or EJBs.
 */
public void setWrapperPolicy(WrapperPolicy wrapperPolicy) {
  this.wrapperPolicy = wrapperPolicy;
  // For bug 2766379 must be able to set the wrapper policy back to default
  // which is null.
  if (wrapperPolicy != null) {
    wrapperPolicy.setDescriptor(this);
  }
  getObjectBuilder().setHasWrapperPolicy(wrapperPolicy != null);
}

if (this.descriptor.hasWrapperPolicy() && this.descriptor.getWrapperPolicy().isWrapped(clone)) {

getWrapperPolicy().initialize(session);

  /**
   * Wrap the object if required.
   * This is used for the wrapper policy support and EJB.
   */
  public Object wrapObject(Object implementation, AbstractSession session) {
    if (!this.hasWrapperPolicy) {
      return implementation;
    }
    if (implementation == null) {
      return null;
    }
    // PERF: Using direct variable access.
    
    // Check if already wrapped.
    if ((!this.descriptor.hasWrapperPolicy()) || this.descriptor.getWrapperPolicy().isWrapped(implementation)) {
      return implementation;
    }

    // Allow for inheritance, the concrete wrapper must always be used.
    if (this.descriptor.hasInheritance() && this.descriptor.getInheritancePolicy().hasChildren() && (implementation.getClass() != this.descriptor.getJavaClass())) {
      ClassDescriptor descriptor = session.getDescriptor(implementation);
      if (descriptor != this.descriptor) {
        return descriptor.getObjectBuilder().wrapObject(implementation, session);
      }
    }
    return this.descriptor.getWrapperPolicy().wrapObject(implementation, session);
  }
}

m_parentDescriptor.getWrapperPolicy().unwrapObject(parentObj, uow);

/**
 * ADVANCED:
 * Sets the WrapperPolicy for this descriptor.
 * This advanced feature can be used to wrap objects with other classes such as CORBA TIE objects or EJBs.
 */
public void setWrapperPolicy(WrapperPolicy wrapperPolicy) {
  this.wrapperPolicy = wrapperPolicy;
  // For bug 2766379 must be able to set the wrapper policy back to default
  // which is null.
  if (wrapperPolicy != null) {
    wrapperPolicy.setDescriptor(this);
  }
  getObjectBuilder().setHasWrapperPolicy(wrapperPolicy != null);
}

m_parentDescriptor.getWrapperPolicy().unwrapObject(parentObj, uow);

Javadoc

Purpose: The wrapper policy can be used to wrap all objects read from the database in another object. This allows for EclipseLink to utilize one version of the class for its purposes and allows for the application to deal with another version of the object. The wrapper policy is used for things such as EJB Entity Beans and is directly used by the TopLink for WebLogic product for EJB Container Managed Persistence. It is assumed that relationships must be through the wrapper objects. Object identity is not maintained on the wrapper objects, only the wrapped object.

Most used methods

initialize
PUBLIC: Required: Lets the policy perform initialization.
isWrapped
PUBLIC: Required: Return true if the object is already wrapped.
setDescriptor
PUBLIC: Required: Set the descriptor.
unwrapObject
PUBLIC: Required: Unwrap the object to return the implementation that is meant to be used by Eclipse
wrapObject
PUBLIC: Required: Wrap the object to return the implementation that the application requires. The ob

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