How to use

getReferencedClassDescriptor

method

in

org.intermine.metadata.CollectionDescriptor

/**
 * Takes a Class, and generates a Map of all the collections that are in the Class or any of its
 * parents. The Class may be a dynamic class - ie not in the model, although at least one of its
 * parents are in the model.
 *
 * @param c a Class
 * @return a Map from String collection name to Class element type
 */
public Map<String, Class<?>> getCollectionsForClass(Class<?> c) {
  synchronized (classToCollectionsMap) {
    Map<String, Class<?>> retval = classToCollectionsMap.get(c);
    if (retval == null) {
      retval = new LinkedHashMap<String, Class<?>>();
      for (FieldDescriptor fd : getFieldDescriptorsForClass(c).values()) {
        if (fd instanceof CollectionDescriptor) {
          CollectionDescriptor cd = (CollectionDescriptor) fd;
          retval.put(cd.getName(), cd.getReferencedClassDescriptor().getType());
        }
      }
      classToCollectionsMap.put(c, retval);
    }
    return retval;
  }
}

/**
 * Takes a Class, and generates a Map of all the collections that are in the Class or any of its
 * parents. The Class may be a dynamic class - ie not in the model, although at least one of its
 * parents are in the model.
 *
 * @param c a Class
 * @return a Map from String collection name to Class element type
 */
public Map<String, Class<?>> getCollectionsForClass(Class<?> c) {
  synchronized (classToCollectionsMap) {
    Map<String, Class<?>> retval = classToCollectionsMap.get(c);
    if (retval == null) {
      retval = new LinkedHashMap<String, Class<?>>();
      for (FieldDescriptor fd : getFieldDescriptorsForClass(c).values()) {
        if (fd instanceof CollectionDescriptor) {
          CollectionDescriptor cd = (CollectionDescriptor) fd;
          retval.put(cd.getName(), cd.getReferencedClassDescriptor().getType());
        }
      }
      classToCollectionsMap.put(c, retval);
    }
    return retval;
  }
}

  .append(StringUtil.reverseCapitalisation(name))
  .append("(final ")
  .append(((CollectionDescriptor) field).getReferencedClassDescriptor().getName())
  .append(" arg)");
if (fieldPresent) {

  .append(StringUtil.reverseCapitalisation(name))
  .append("(final ")
  .append(((CollectionDescriptor) field).getReferencedClassDescriptor().getName())
  .append(" arg)");
if (fieldPresent) {

CollectionDescriptor cd = (CollectionDescriptor) fd;
@SuppressWarnings("unchecked") Collection lazyColl = new ProxyCollection(os,
    (InterMineObject) retval, cd.getName(), cd.getReferencedClassDescriptor()
      .getType());
retval.setFieldValue(cd.getName(), lazyColl);

CollectionDescriptor cd = (CollectionDescriptor) fd;
@SuppressWarnings("unchecked") Collection lazyColl = new ProxyCollection(os,
    (InterMineObject) retval, cd.getName(), cd.getReferencedClassDescriptor()
      .getType());
retval.setFieldValue(cd.getName(), lazyColl);

CollectionDescriptor coll = (CollectionDescriptor) maybeColl;
Collection<Object> lazyColl = new ProxyCollection<Object>(os, retval,
    coll.getName(), coll.getReferencedClassDescriptor().getType());
retval.setFieldValue(coll.getName(), lazyColl);

CollectionDescriptor coll = (CollectionDescriptor) maybeColl;
Collection<Object> lazyColl = new ProxyCollection<Object>(os, retval,
    coll.getName(), coll.getReferencedClassDescriptor().getType());
retval.setFieldValue(coll.getName(), lazyColl);

public void testReferencedClassNotSet() throws Exception {
  CollectionDescriptor cod1 = new CollectionDescriptor("cod1", "Class2", null);
  Set<CollectionDescriptor> collections = Collections.singleton(cod1);
  // cld1 has a CollectionDescriptor that contains objects of type Class2
  new ClassDescriptor("Class1", null, false, noAttrs, noRefs, collections);
  new ClassDescriptor("Class2", null, false, noAttrs, noRefs, noColls);
  try {
    cod1.getReferencedClassDescriptor();
    fail("Expected IllegalStateException, model has not yet been set");
  } catch (IllegalStateException e) {
  }
}

public void testGetReferencedClass() throws Exception {
  CollectionDescriptor cod1 = new CollectionDescriptor("cod1", "package.name.Class2", null);
  Set<CollectionDescriptor> collections = Collections.singleton(cod1);
  // cld1 has a ReferenceDescriptor that points to Class2
  ClassDescriptor cld1 = new ClassDescriptor("package.name.Class1", null, false, noAttrs, noRefs, collections);
  ClassDescriptor cld2 = new ClassDescriptor("package.name.Class2", null, false, noAttrs, noRefs, noColls);
  new Model("model", "package.name", Arrays.asList(cld1, cld2));
  try {
    ClassDescriptor refCld = cod1.getReferencedClassDescriptor();
    assertTrue("ClassDescriptor was null", refCld != null);
    assertTrue("Expected ClassDescriptor to be Class2", refCld.getName().equals("package.name.Class2"));
  } catch (IllegalStateException e) {
    fail("Should have returned a ClassDescriptor");
  }
}

if (coll.relationType() == FieldDescriptor.ONE_N_RELATION) {
  QueryClass qc = new QueryClass(coll
      .getReferencedClassDescriptor().getType());
  subQ.addFrom(qc);
  QueryForeignKey qfk = new QueryForeignKey(qc,
  QueryClass qc1 = new QueryClass(clazz);
  QueryClass qc2 = new QueryClass(coll
      .getReferencedClassDescriptor().getType());
  subQ.addFrom(qc1);
  subQ.addFrom(qc2);
  QueryClass qc1 = new QueryClass(clazz);
  QueryClass qc2 = new QueryClass(coll
      .getReferencedClassDescriptor().getType());
  subQ.addFrom(qc1);
  subQ.addFrom(qc2);

if (coll.relationType() == FieldDescriptor.ONE_N_RELATION) {
  QueryClass qc = new QueryClass(coll
      .getReferencedClassDescriptor().getType());
  subQ.addFrom(qc);
  QueryForeignKey qfk = new QueryForeignKey(qc,
  QueryClass qc1 = new QueryClass(clazz);
  QueryClass qc2 = new QueryClass(coll
      .getReferencedClassDescriptor().getType());
  subQ.addFrom(qc1);
  subQ.addFrom(qc2);
  QueryClass qc1 = new QueryClass(clazz);
  QueryClass qc2 = new QueryClass(coll
      .getReferencedClassDescriptor().getType());
  subQ.addFrom(qc1);
  subQ.addFrom(qc2);

/**
 * If the last element in the path is a reference or collection return the ClassDescriptor that
 * the reference or collection references.  If the path has one element (eg. "Employee"),
 * return its ClassDescriptor.  If the last element in the path is an attribute, return null.
 * @return the ClassDescriptor
 */
public ClassDescriptor getEndClassDescriptor() {
  if (getEndFieldDescriptor() == null) {
    return getStartClassDescriptor();
  }
  if (!getEndFieldDescriptor().isAttribute()) {
    if (getEndFieldDescriptor().isCollection()) {
      CollectionDescriptor collDesc = (CollectionDescriptor) getEndFieldDescriptor();
      return collDesc.getReferencedClassDescriptor();
    }
    if  (getEndFieldDescriptor().isReference()) {
      ReferenceDescriptor refDesc =  (ReferenceDescriptor) getEndFieldDescriptor();
      return refDesc.getReferencedClassDescriptor();
    }
  }
  return null;
}

/**
 * If the last element in the path is a reference or collection return the ClassDescriptor that
 * the reference or collection references.  If the path has one element (eg. "Employee"),
 * return its ClassDescriptor.  If the last element in the path is an attribute, return null.
 * @return the ClassDescriptor
 */
public ClassDescriptor getEndClassDescriptor() {
  if (getEndFieldDescriptor() == null) {
    return getStartClassDescriptor();
  }
  if (!getEndFieldDescriptor().isAttribute()) {
    if (getEndFieldDescriptor().isCollection()) {
      CollectionDescriptor collDesc = (CollectionDescriptor) getEndFieldDescriptor();
      return collDesc.getReferencedClassDescriptor();
    }
    if  (getEndFieldDescriptor().isReference()) {
      ReferenceDescriptor refDesc =  (ReferenceDescriptor) getEndFieldDescriptor();
      return refDesc.getReferencedClassDescriptor();
    }
  }
  return null;
}