| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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.apache.wicket.feedback; |
| |
| import java.io.Serializable; |
| import java.util.ArrayList; |
| import java.util.Collections; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.concurrent.CopyOnWriteArrayList; |
| |
| import org.apache.wicket.Component; |
| import org.apache.wicket.util.io.IClusterable; |
| import org.apache.wicket.util.string.StringList; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * Holds list of feedback messages. The list can be added to, cleared, queried and filtered. |
| * <p> |
| * WARNING: This class should typically NOT be used directly. |
| * <p> |
| * |
| * @author Eelco Hillenius |
| * @author Jonathan Locke |
| */ |
| public final class FeedbackMessages implements IClusterable, Iterable<FeedbackMessage> |
| { |
| /** Log. */ |
| private static final Logger log = LoggerFactory.getLogger(FeedbackMessages.class); |
| |
| private static final long serialVersionUID = 1L; |
| |
| /** |
| * Holds a list of {@link org.apache.wicket.feedback.FeedbackMessage}s. |
| */ |
| private final List<FeedbackMessage> messages; |
| |
| /** |
| * Construct. |
| */ |
| public FeedbackMessages() |
| { |
| messages = new CopyOnWriteArrayList<>(); |
| } |
| |
| /** |
| * Adds a message. |
| * |
| * @param message |
| * the message |
| */ |
| public final void add(FeedbackMessage message) |
| { |
| log.debug("Adding feedback message '{}'", message); |
| |
| synchronized (messages) |
| { |
| messages.add(message); |
| } |
| } |
| |
| /** |
| * Adds a message |
| * |
| * @param reporter |
| * @param message |
| * @param level |
| */ |
| public final void add(Component reporter, Serializable message, int level) |
| { |
| add(new FeedbackMessage(reporter, message, level)); |
| } |
| |
| /** |
| * Adds a new ui message with level DEBUG to the current messages. |
| * |
| * @param reporter |
| * the reporting component |
| * @param message |
| * the actual message |
| */ |
| public final void debug(Component reporter, Serializable message) |
| { |
| add(new FeedbackMessage(reporter, message, FeedbackMessage.DEBUG)); |
| } |
| |
| /** |
| * Adds a new ui message with level INFO to the current messages. |
| * |
| * @param reporter |
| * The reporting component |
| * @param message |
| * The actual message |
| */ |
| public final void info(Component reporter, Serializable message) |
| { |
| add(new FeedbackMessage(reporter, message, FeedbackMessage.INFO)); |
| } |
| |
| /** |
| * Adds a new ui message with level SUCCESS to the current messages. |
| * |
| * @param reporter |
| * The reporting component |
| * @param message |
| * The actual message |
| */ |
| public final void success(Component reporter, Serializable message) |
| { |
| add(new FeedbackMessage(reporter, message, FeedbackMessage.SUCCESS)); |
| } |
| |
| /** |
| * Adds a new ui message with level WARNING to the current messages. |
| * |
| * @param reporter |
| * the reporting component |
| * @param message |
| * the actual message |
| */ |
| public final void warn(Component reporter, Serializable message) |
| { |
| add(new FeedbackMessage(reporter, message, FeedbackMessage.WARNING)); |
| } |
| |
| /** |
| * Adds a new ui message with level ERROR to the current messages. |
| * |
| * @param reporter |
| * the reporting component |
| * @param message |
| * the actual message |
| */ |
| public final void error(Component reporter, Serializable message) |
| { |
| add(new FeedbackMessage(reporter, message, FeedbackMessage.ERROR)); |
| } |
| |
| /** |
| * Adds a new ui message with level FATAL to the current messages. |
| * |
| * @param reporter |
| * the reporting component |
| * @param message |
| * the actual message |
| */ |
| public final void fatal(Component reporter, Serializable message) |
| { |
| add(new FeedbackMessage(reporter, message, FeedbackMessage.FATAL)); |
| } |
| |
| /** |
| * Clears any existing messages. |
| * |
| * @return The number of messages deleted |
| */ |
| public final int clear() |
| { |
| return clear(null); |
| } |
| |
| /** |
| * Clears all messages that are accepted by the filter. |
| * |
| * @param filter |
| * Filter for selecting messages. If null, all messages will be returned |
| * @return The number of messages deleted |
| */ |
| public final int clear(final IFeedbackMessageFilter filter) |
| { |
| if (messages.isEmpty()) |
| { |
| return 0; |
| } |
| |
| List<FeedbackMessage> toDelete = messages(filter); |
| |
| for (FeedbackMessage message : toDelete) |
| { |
| message.detach(); |
| } |
| |
| synchronized(messages) |
| { |
| int sizeBefore = messages.size(); |
| messages.removeAll(toDelete); |
| int sizeAfter = messages.size(); |
| return sizeAfter - sizeBefore; |
| } |
| } |
| |
| /** |
| * @param filter |
| * Filter for selecting messages |
| * @return True if one or more messages matches the filter |
| */ |
| public final boolean hasMessage(final IFeedbackMessageFilter filter) |
| { |
| for (final FeedbackMessage message : messages) |
| { |
| if (filter == null || filter.accept(message)) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Checks if a message of the specified {@code level} or greater was registered.<br /> |
| * To check for a precise {@code level} use {@link #hasMessage(IFeedbackMessageFilter)} |
| * and pass it a reference to {@link org.apache.wicket.feedback.ExactLevelFeedbackMessageFilter}. |
| * |
| * @param level |
| * The level of the message |
| * @return {@code true} if a message with the specified {@code level} or greater was registered |
| */ |
| public final boolean hasMessage(final int level) |
| { |
| for (FeedbackMessage message : messages) |
| { |
| if (message.isLevel(level)) |
| { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /** |
| * Retrieves the first message |
| * |
| * @return message or {@code null} if none |
| */ |
| public final FeedbackMessage first() |
| { |
| return messages.size() > 0 ? messages.get(0) : null; |
| } |
| |
| /** |
| * Retrieves the first message that level is greater than or equal to the given level |
| * |
| * @param level |
| * The minimum level of the message |
| * @return a message with the same or a higher level, or {@code null} if none |
| */ |
| public final FeedbackMessage first(final int level) |
| { |
| for (FeedbackMessage message : messages) |
| { |
| if (message.isLevel(level)) |
| { |
| return message; |
| } |
| } |
| return null; |
| } |
| |
| /** |
| * Gets an iterator over stored messages |
| * |
| * @return iterator over stored messages |
| */ |
| @Override |
| public final Iterator<FeedbackMessage> iterator() |
| { |
| return messages.iterator(); |
| } |
| |
| /** |
| * Gets a list of messages from the page using a filter. |
| * |
| * @param filter |
| * Filter for selecting messages. If null, all messages will be returned |
| * @return The messages or an empty list if no messages are found |
| */ |
| public final List<FeedbackMessage> messages(final IFeedbackMessageFilter filter) |
| { |
| if (messages.isEmpty()) |
| { |
| return Collections.emptyList(); |
| } |
| |
| final List<FeedbackMessage> list = new ArrayList<FeedbackMessage>(); |
| for (final FeedbackMessage message : messages) |
| { |
| if (filter == null || filter.accept(message)) |
| { |
| list.add(message); |
| } |
| } |
| return list; |
| } |
| |
| /** |
| * Gets whether there are no messages. |
| * |
| * @return True when there are no messages |
| */ |
| public final boolean isEmpty() |
| { |
| return messages.isEmpty(); |
| } |
| |
| /** |
| * Gets the number of messages |
| * |
| * @return the number of messages |
| */ |
| public final int size() |
| { |
| return messages.size(); |
| } |
| |
| /** |
| * Gets the number of messages. |
| * |
| * @param filter |
| * Filter for counting messages. If null, the count of all messages will be returned |
| * |
| * @return the number of messages |
| */ |
| public final int size(final IFeedbackMessageFilter filter) |
| { |
| int count = 0; |
| for (final FeedbackMessage message : messages) |
| { |
| if (filter == null || filter.accept(message)) |
| { |
| count++; |
| } |
| } |
| return count; |
| } |
| |
| /** |
| * @see java.lang.Object#toString() |
| */ |
| @Override |
| public String toString() |
| { |
| return "[feedbackMessages = " + StringList.valueOf(messages) + ']'; |
| } |
| |
| /** |
| * Retrieves all stored messages as an unmodifiable list |
| * |
| * @return stored messages as unmodifiable list |
| */ |
| public List<FeedbackMessage> toList() |
| { |
| return Collections.unmodifiableList(messages); |
| } |
| |
| /** |
| * Detaches each stored message |
| */ |
| public void detach() |
| { |
| for (FeedbackMessage message : messages) |
| { |
| message.detach(); |
| } |
| } |
| } |