/*
* Zed Attack Proxy (ZAP) and its related class files.
*
* ZAP is an HTTP/HTTPS proxy for assessing web application security.
*
* Copyright 2013 The ZAP Development Team
*
* 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 org.zaproxy.zap.view.messagecontainer;
import java.util.List;
import org.zaproxy.zap.extension.httppanel.Message;
/**
* A {@code MultipleMessagesContainer} that exposes the selected messages in the GUI component.
*
* @param <T> the type of messages in this container
* @see MessageContainer
* @see MultipleMessagesContainer
* @see SingleMessageContainer
* @since 2.3.0
*/
public interface SelectableMessagesContainer<T extends Message> extends MultipleMessagesContainer<T> {
/**
* Tells whether or not there is at least one message selected.
*
* @return {@code true} if at least one message is selected, {@code false} otherwise.
*/
boolean hasSelectedMessages();
/**
* Tells whether or not only and only one message is selected.
*
* @return {@code true} if only one message is selected, {@code false} otherwise.
*/
boolean isOnlyOneMessageSelected();
/**
* Returns the selected message or {@code null} if none. If multiple messages are selected the first one is returned.
*
* @return the selected message or {@code null} if none.
*/
T getSelectedMessage();
/**
* Returns the number of selected messages.
*
* @return the number of selected messages.
*/
int getNumberOfSelectedMessages();
/**
* Returns all the selected messages or an empty {@code List} if none.
* <p>
* No assumptions should be made on the actual implementation type of the {@code List} returned by this method (for example,
* it might be unmodifiable or its elements lazy loaded).
* <p>
* <strong>Note:</strong> Extra care should be taken when getting the messages from the list since it might return
* {@code null} which indicate that an error occurred while getting a message (for example, failed to read a persisted
* message).
*
* @return a {@code List} with all the selected messages, never {@code null}.
*/
List<T> getSelectedMessages();
}