Examples of ch.agent.crnickl.api.Database

ch.agent.crnickl.api.Database
Database is the hub of CrNiCKL (pronounced chronicle). A client gets one or more Database objects using {@link DatabaseFactory}. Five interfaces play an important role in the data model underlying CrNiCKL:
- {@link Chronicle}
- {@link Series}
- {@link Schema}
- {@link Property}
- {@link ValueType}
These interfaces provide read access to the objects. When writing to the database, read/write versions of the interfaces are required:
- {@link UpdatableChronicle}
- {@link UpdatableSeries}
- {@link UpdatableSchema}
- {@link UpdatableProperty}
- {@link UpdatableValueType}
Read/write objects are obtained from the read only objects using the edit() method.
Two methods are provided for transactions management: {@link #commit()} and {@link #rollback()}. These methods are not used internally by CrNiCKL. Managing transactions and implementing transaction boundaries is the client's responsibility. @author Jean-Paul Vetterli @version 1.0.0

   * @return a chronicle or null
   * @throws T2DBException
   */
  public Chronicle getChronicleOrNull(Chronicle parent, String name) throws T2DBException {
    try {
      Database database = parent.getDatabase();
      DBObject obj = getMongoDB(database).getChronicles().findOne(
          mongoObject(MongoDatabase.FLD_CHRON_PARENT, getIdOrZero(parent), 
          MongoDatabase.FLD_CHRON_NAME, name));
      if (obj != null) {
        Chronicle chronicle = unpack(database, (BasicDBObject) obj);

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  public Collection<Chronicle> getChroniclesByParent(Chronicle parent) throws T2DBException {
    Collection<Chronicle> result = new ArrayList<Chronicle>();
    if (check(Permission.DISCOVER, parent, false)) {
      try {
        Database db = parent.getDatabase();
        DBCursor cursor = getMongoDB(db).getChronicles().find(
            mongoObject(MongoDatabase.FLD_CHRON_PARENT, getIdOrZero(parent)));
        try {
          while (cursor.hasNext()) {
            Chronicle chronicle = unpack(db, (BasicDBObject) cursor.next());

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   * @throws T2DBException
   */
  public boolean getAttributeValue(List<Chronicle> chronicles, Attribute<?> attribute) throws T2DBException {
    boolean found = false;
    Surrogate s = attribute.getProperty().getSurrogate();
    Database db = s.getDatabase();
    try {
      ObjectId[] chrOids = new ObjectId[chronicles.size()];
      int offset = 0;
      for(Chronicle chronicle : chronicles) {
        chrOids[offset++] = getId(chronicle);

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   * @throws T2DBException
   */
  public <T>List<Chronicle> getChroniclesByAttributeValue(Property<T> property, T value, int maxSize) throws T2DBException {
    List<Chronicle> result = new ArrayList<Chronicle>();
    Surrogate s = property.getSurrogate();
    Database db = s.getDatabase();
    try {
      DBCursor cursor = getMongoDB(db).getAttributes().find(
          mongoObject(MongoDatabase.FLD_ATTR_PROP,
              getId(s), MongoDatabase.FLD_ATTR_VALUE, 
              property.getValueType().toString(value)));

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          if (map.put(numbers[i], i) != null)
            throw new IllegalArgumentException("duplicate number: " + numbers[i]);
        }
      }
      Surrogate s = chronicle.getSurrogate();
      Database db = s.getDatabase();
      try {
        check(Permission.READ, chronicle);
      } catch (Exception e) {
        throw T2DBMsg.exception(e, E.E40104, s.toString());
      }

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public class T001_SetUpTest extends AbstractTest {


  public void test_setUp() {
    try {
      Database db = getContext().getDatabase();
      System.out.println(db.toString());
    } catch (Exception e) {
      fail(e.getMessage());
    }
  }

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      if (def.isErasing()) {
        create_schema_component.setInt(4, 0);
        create_schema_component.setString(5, "");
        create_schema_component.setString(6, "");
      } else {
        Database database = schema.getSurrogate().getDatabase();
        Property<?> prop = ((JDBCDatabase)database).getReadMethodsForProperty().
            getProperty(def.getProperty().getSurrogate());
        if (prop == null)
          throw T2DBMsg.exception(E.E30130);
        create_schema_component.setInt(4, getId(prop));

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   * @return a chronicle surrogate or null
   * @throws T2DBException
   */
  public Surrogate findChronicle(Schema schema) throws T2DBException {
    Surrogate result = null;
    Database database = schema.getSurrogate().getDatabase();
    try {
      find_entity_with_schema = open(FIND_ENTITY_WITH_SCHEMA, database, find_entity_with_schema);
      find_entity_with_schema.setInt(1, getId(schema));
      ResultSet rs = find_entity_with_schema.executeQuery();
      while (rs.next()) {

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   * @return a surrogate or null
   * @throws T2DBException
   */
  public Surrogate findChronicle(Property<?> property, Schema schema) throws T2DBException {
    Surrogate result = null;
    Database database = property.getSurrogate().getDatabase();
    try {
      find_entity_with_property = open(FIND_ENTITY_WITH_PROPERTY, property, find_entity_with_property);
      find_entity_with_property.setInt(1, getId(property));
      ResultSet rs = find_entity_with_property.executeQuery();
      while(rs.next()) {
        Surrogate entityKey = makeSurrogate(database, DBObjectType.CHRONICLE, rs.getInt(1));
        Schema s = database.getChronicle(entityKey).getSchema(true);
        if (s.dependsOnSchema(schema)) {
          result = entityKey;
          break;
        }
      }

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   * @return a surrogate or null
   * @throws T2DBException
   */
  public Surrogate findChronicle(SeriesDefinition ss, Schema schema) throws T2DBException {
    Surrogate result = null;
    Database database = schema.getSurrogate().getDatabase();
    try {
      find_entity_with_series = open(FIND_ENTITY_WITH_SERIES, database, find_entity_with_series);
      find_entity_with_series.setInt(1, ss.getNumber());
      ResultSet rs = find_entity_with_series.executeQuery();
      while (rs.next()) {
        Surrogate entityKey = makeSurrogate(database, DBObjectType.CHRONICLE, rs.getInt(1));
        Schema s = database.getChronicle(entityKey).getSchema(true);
        if (s.dependsOnSchema(schema)) {
          result = entityKey;
          break;
        }
      }

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ch.agent.crnickl.jdbc.ReadMethodsForChroniclesAndSeries

ch.agent.crnickl.jdbc.WriteMethodsForSchema

ch.agent.crnickl.junit.T001_SetUpTest

ch.agent.crnickl.mongodb.MongoDBSchemaUpdatePolicy

ch.agent.crnickl.mongodb.ReadMethodsForChroniclesAndSeries

ch.agent.crnickl.mongodb.WriteMethodsForChroniclesAndSeries

ch.agent.crnickl.mongodb.WriteMethodsForSchema

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