How to use

getReverseReferenceDescriptor

method

in

org.intermine.metadata.CollectionDescriptor

/**
 * {@inheritDoc}
 */
@Override
public int relationType() {
  ReferenceDescriptor rd = getReverseReferenceDescriptor();
  if (rd == null || rd instanceof CollectionDescriptor) {
    return M_N_RELATION;
  } else {
    return ONE_N_RELATION;
  }
}

/**
 * {@inheritDoc}
 */
@Override
public int relationType() {
  ReferenceDescriptor rd = getReverseReferenceDescriptor();
  if (rd == null || rd instanceof CollectionDescriptor) {
    return M_N_RELATION;
  } else {
    return ONE_N_RELATION;
  }
}

if (!indirections.contains(collection.getReverseReferenceDescriptor())) {
  indirections.add(collection);

if (!indirections.contains(collection.getReverseReferenceDescriptor())) {
  indirections.add(collection);

    schema.getVersion());
if ((columnName.compareTo(columnName2) < 0)
  || (col.getReverseReferenceDescriptor() == null)) {
  addStatement(statements,
         tableName + "__"  + columnName, tableName,

/**
 * Creates a column name for the "outward" key of a many-to-many collection descriptor.
 *
 * @param col CollectionDescriptor
 * @param version the database version number
 * @return a valid column name
 */
public static String getOutwardIndirectionColumnName(CollectionDescriptor col, int version) {
  if (FieldDescriptor.M_N_RELATION != col.relationType()) {
    throw new IllegalArgumentException("Argument must be a CollectionDescriptor for a "
                      + "many-to-many relation");
  }
  if (version == 0) {
    ReferenceDescriptor rd = col.getReverseReferenceDescriptor();
    String colName = (rd == null
      ? TypeUtil.unqualifiedName(col.getClassDescriptor().getName())
      : rd.getName());
    return StringUtil.capitalise(generateSqlCompatibleName(colName));
  } else if (version == 1) {
    return StringUtil.capitalise(generateSqlCompatibleName(col.getName()));
  } else {
    throw new IllegalArgumentException("Database version number " + version
        + " not recognised");
  }
}

/**
 * Creates a column name for the "inward" key of a many-to-many collection descriptor.
 *
 * @param col CollectionDescriptor
 * @param version the database version number
 * @return a valid column name
 */
public static String getInwardIndirectionColumnName(CollectionDescriptor col, int version) {
  if (FieldDescriptor.M_N_RELATION != col.relationType()) {
    throw new IllegalArgumentException("Argument must be a CollectionDescriptor for a "
                      + "many-to-many relation");
  }
  if (version == 0) {
    return StringUtil.capitalise(generateSqlCompatibleName(col.getName()));
  } else if (version == 1) {
    ReferenceDescriptor rd = col.getReverseReferenceDescriptor();
    String colName = (rd == null
      ? TypeUtil.unqualifiedName(col.getClassDescriptor().getName())
      : rd.getName());
    return StringUtil.capitalise(generateSqlCompatibleName(colName));
  } else {
    throw new IllegalArgumentException("Database version number " + version
        + " not recognised");
  }
}

    schema.getVersion());
if ((columnName.compareTo(columnName2) < 0)
  || (col.getReverseReferenceDescriptor() == null)) {
  addStatement(statements,
         tableName + "__"  + columnName, tableName,

/**
 * Creates a column name for the "inward" key of a many-to-many collection descriptor.
 *
 * @param col CollectionDescriptor
 * @param version the database version number
 * @return a valid column name
 */
public static String getInwardIndirectionColumnName(CollectionDescriptor col, int version) {
  if (FieldDescriptor.M_N_RELATION != col.relationType()) {
    throw new IllegalArgumentException("Argument must be a CollectionDescriptor for a "
                      + "many-to-many relation");
  }
  if (version == 0) {
    return StringUtil.capitalise(generateSqlCompatibleName(col.getName()));
  } else if (version == 1) {
    ReferenceDescriptor rd = col.getReverseReferenceDescriptor();
    String colName = (rd == null
      ? TypeUtil.unqualifiedName(col.getClassDescriptor().getName())
      : rd.getName());
    return StringUtil.capitalise(generateSqlCompatibleName(colName));
  } else {
    throw new IllegalArgumentException("Database version number " + version
        + " not recognised");
  }
}

/**
 * Creates a column name for the "outward" key of a many-to-many collection descriptor.
 *
 * @param col CollectionDescriptor
 * @param version the database version number
 * @return a valid column name
 */
public static String getOutwardIndirectionColumnName(CollectionDescriptor col, int version) {
  if (FieldDescriptor.M_N_RELATION != col.relationType()) {
    throw new IllegalArgumentException("Argument must be a CollectionDescriptor for a "
                      + "many-to-many relation");
  }
  if (version == 0) {
    ReferenceDescriptor rd = col.getReverseReferenceDescriptor();
    String colName = (rd == null
      ? TypeUtil.unqualifiedName(col.getClassDescriptor().getName())
      : rd.getName());
    return StringUtil.capitalise(generateSqlCompatibleName(colName));
  } else if (version == 1) {
    return StringUtil.capitalise(generateSqlCompatibleName(col.getName()));
  } else {
    throw new IllegalArgumentException("Database version number " + version
        + " not recognised");
  }
}

public void testReverseReferenceValid() throws Exception {
  // codd1 in Class1 points to Class2, cod2 in Class2 points to Class1
  CollectionDescriptor cod1 = new CollectionDescriptor("cod1", "package.name.Class2", "cod2");
  CollectionDescriptor cod2 = new CollectionDescriptor("cod2", "package.name.Class1", "cod1");
  Set<CollectionDescriptor> cols1 = Collections.singleton(cod1);
  Set<CollectionDescriptor> cols2 = Collections.singleton(cod2);
  ClassDescriptor cld1 = new ClassDescriptor("package.name.Class1", null, false, noAttrs, noRefs, cols1);
  ClassDescriptor cld2 = new ClassDescriptor("package.name.Class2", null, false, noAttrs, noRefs, cols2);
  new Model("model", "package.name", Arrays.asList(cld1, cld2));
  try {
    ReferenceDescriptor rfdReverse = cod1.getReverseReferenceDescriptor();
    assertEquals(cod2, rfdReverse);
    assertEquals(cld1, rfdReverse.getReferencedClassDescriptor());
  } catch (IllegalStateException e) {
    fail("Should have returned reverse ReferenceDescriptor");
  }
}