/* Copyright (c) 2008 Google Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package sample.contacts;
import com.google.gdata.data.contacts.ContactEntry;
import com.google.gdata.data.contacts.ContactGroupEntry;
import java.io.PrintStream;
/**
* Interface to define the common methods of the {@link ElementHelper}.
*
*
*/
public interface ElementHelperInterface {
/**
* Parses an element from the textual description, and sets or adds it to
* the contact entry.
*
* @param contact the contact the parsed element should be added or set.
* @param parser the parser used for the parsing of the description.
*
* @see ElementParser
*/
public void parse(ContactEntry contact, ElementParser parser);
/**
* Parses an element from the textual description, and sets or adds it to
* the group entry.
*
* @param group the group the parsed element should be added or set.
* @param parser the parser used for the parsing of the description.
*
* @throws UnsupportedOperationException in case the specific element
* can not be set on a ContactGroupEntry.
*
* @see ElementParser
*/
public void parseGroup(ContactGroupEntry group, ElementParser parser);
/**
* Prints the content of the element to a stream.
*
* @param out output stream.
* @param contact the contact containing the element to print.
*/
public void print(PrintStream out, ContactEntry contact);
/**
* Updates element of destination contact with data from source contact.
* If the source contact entry does not has the specific element, it should
* leave the destination contact entry as is, otherwise is should copy the
* element from the source to the destination contact entry.
*
* @param dest the destination contact entry.
* @param src the source contact entry.
*/
public void update(ContactEntry dest, ContactEntry src);
/**
* Returns the usage help text regarding the formating of an element
* description.
*
* @return the usage help text for the element description.
*/
public String getUsage();
}