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package oracle.toplink.essentials.sessions;
import java.util.*;
import oracle.toplink.essentials.exceptions.ValidationException;
import oracle.toplink.essentials.internal.helper.DatabaseField;
import oracle.toplink.essentials.internal.sessions.AbstractRecord;
/**
* <p>
* <b>Purpose</b>: Define a representation of a database row as field=>value pairs.
* This is the database row implementation class, the Record or java.util.Map interfaces
* should be used to access this class instead of the implemention class.
* <p>
* <b>Responsibilities</b>: <ul>
* <li> Implement the common hashtable collection protocol.
* <li> Allow get and put on the field or field name.
* </ul>
* @see DatabaseField
* @see Record
* @see java.util.Map
*/
public class DatabaseRecord extends AbstractRecord {
/**
* INTERNAL:
* Returns a record (of default size).
*/
public DatabaseRecord() {
super();
}
/**
* INTERNAL:
* Returns a record of the given initial capacity.
* @param initialCapacity
*/
public DatabaseRecord(int initialCapacity) {
super(initialCapacity);
}
/**
* INTERNAL:
* Builds row from database result fields and values.
* Note: the entire database result will share the same fields vector.
* @param fields Vector of fields
* @param values Vector of values
*/
public DatabaseRecord(Vector fields, Vector values) {
super(fields, values);
}
/**
* PUBLIC:
* Clears the contents of the database row, both fields and values.
*/
public void clear() {
super.clear();
}
/**
* PUBLIC:
* Checks if the given Object value is contained in the values held
* in the database row.
* @param value the Object to be considered
* @return boolean - true if the Object value is in the row.
*/
public boolean contains(Object value) {
return super.containsValue(value);
}
/**
* PUBLIC:
* Checks if a key (ie. the field) is contained in the database row.
* Conforms to a hashtable interface.
* @param key an Object, either String or DatabaseField
* @return boolean - true if the row with the corresponding key is in the row.
*/
public boolean containsKey(Object key) {
return super.containsKey(key);
}
/**
* PUBLIC:
* Checks if a given field is contained in the database row.
* @param key String, the DatabaseField name
* @return boolean - true if the row contains the key with the corresponding fieldName.
*/
public boolean containsKey(String fieldName) {
return super.containsKey(fieldName);
}
/**
* PUBLIC:
* Checks if the given Object value is contained in the values held
* in the database row.
* @param value the Object under consideration
* @return boolean - true if the row contains the Object as a value
*/
public boolean containsValue(Object value) {
return super.containsValue(value);
}
/**
* PUBLIC:
* Returns an Enumeration of the values in the database row.
* @return Enumeration
*/
public Enumeration elements() {
return super.elements();
}
/**
* PUBLIC:
* Returns a set of map entries (ie. field-value pairs)in the database row
* with the DatabaseFields as keys and the value Objects as values.
* @see java.util.Map#entrySet()
* @return Set - the set of all the field-value entries (see java.util.Map.Entry)
*/
public Set entrySet() {
return super.entrySet();
}
/**
* PUBLIC:
* Retrieves the value for the given key.
* A field is constructed with the key to check the hash table.
* If missing, null is returned.
* @param key Object, either String or DatabaseField
* @return Object
*/
public Object get(Object key) {
return super.get(key);
}
/**
* PUBLIC:
* Retrieves the value with the given name of the DatabaseField.
* A field is constructed on the name to check the hash table.
* If missing, null is returned.
* @param fieldName String, the DatabaseField name
* @return Object - the value
*/
public Object get(String fieldName) {
return super.get(fieldName);
}
/**
* PUBLIC:
* Retrieves the value with the given field name.
* A field is constructed on the name to check the hash table.
* If missing, DatabaseRow.noEntry is returned.
* @param fieldName String, the DatabaseField name
* @return Object - the value
*/
public Object getIndicatingNoEntry(String fieldName) {
return super.getIndicatingNoEntry(fieldName);
}
/**
* PUBLIC:
* Returns the Object associated with the given key
* (null if the key does not map to an Object.)
* @param key DatabaseField
* @return Object - the value associated with the key
*/
public Object getValues(DatabaseField key) {
return super.get(key);
}
/**
* PUBLIC:
* Returns the Object associated with the given key
* (null if the key does not map to an Object.)
* @param key String
* @return Object - the value associated with the key
*/
public Object getValues(String key) {
return super.get(key);
}
/**
* PUBLIC:
* Checks if the database row is empty (ie. there are no field-value pairs.)
* @return boolean - true if the database row is empty
*/
public boolean isEmpty() {
return super.isEmpty();
}
/**
* PUBLIC:
* Returns an Enumeration of the DatabaseField Objects.
* @return Enumeration
*/
public Enumeration keys() {
return super.keys();
}
/**
* PUBLIC:
* Returns a set of the keys, the DatabaseField Objects, for the database row.
* @return Set of the keys
*/
public Set keySet() {
return super.keySet();
}
/**
* PUBLIC:
* Adds a field-value pair to the row.
* @param key Object, either String or DatabaseField
* @param value Object
* @return Object - the previous Object with that key, could be null
* @throws ValidationException if inappropriate key is used
*/
public Object put(Object key, Object value) throws ValidationException {
return super.put(key, value);
}
/**
* PUBLIC:
* Adds a field-value pair to the row.
* @param key String
* @param value Object
* @return Object - the previous Object with that key, could be null
*/
public Object put(String key, Object value) {
return super.put(key, value);
}
/**
* PUBLIC:
* Adds all of the elements in the given map to the database row.
* @param map Map of all the field-value elements to be added
*/
public void putAll(Map map){
super.putAll(map);
}
/**
* PUBLIC:
* Returns the number of field-value pairs in the database row.
* @return int
*/
public int size() {
return super.size();
}
/**
* PUBLIC:
* Returns a collection of the values held in the database row.
* @return Collection of value Objects
*/
public Collection values() {
return super.values();
}
}
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