| /** |
| * Copyright (c) 2008-2010 Andrey Somov |
| * |
| * 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.yaml.snakeyaml.parser; |
| |
| import java.util.List; |
| |
| import org.yaml.snakeyaml.events.Event; |
| |
| /** |
| * This interface represents an input stream of {@link Event Events}. |
| * <p> |
| * The parser and the scanner form together the 'Parse' step in the loading |
| * process (see chapter 3.1 of the <a href="http://yaml.org/spec/1.1/">YAML |
| * Specification</a>). |
| * </p> |
| * |
| * @see org.yaml.snakeyaml.events.Event |
| */ |
| public interface Parser { |
| |
| /** |
| * Check if the next event is one of the given types. |
| * |
| * @param choices |
| * List of event types. |
| * @return <code>true</code> if the next event can be assigned to a variable |
| * of at least one of the given types. Returns <code>false</code> if |
| * no more events are available. |
| * @throws ParserException |
| * Thrown in case of malformed input. |
| */ |
| public boolean checkEvent(List<Class<? extends Event>> choices); |
| |
| /** |
| * Check if the next event is assignable to the given type. |
| * <p> |
| * This is a convenience method to avoid <code>List</code> creation if |
| * calling {@link #checkEvent(List)} for a single type. |
| * </p> |
| * |
| * @param choice |
| * Event type. |
| * @return True if the next event is an instance of <code>type</code>. False |
| * if no more events are available. |
| * @throws ParserException |
| * Thrown in case of malformed input. |
| */ |
| public boolean checkEvent(Class<? extends Event> choice); |
| |
| /** |
| * Return the next event, but do not delete it from the stream. |
| * |
| * @return The event that will be returned on the next call to |
| * {@link #getEvent} |
| * @throws ParserException |
| * Thrown in case of malformed input. |
| */ |
| public Event peekEvent(); |
| |
| /** |
| * Returns the next event. |
| * <p> |
| * The event will be removed from the stream. |
| * </p> |
| * |
| * @throws ParserException |
| * Thrown in case of malformed input. |
| */ |
| public Event getEvent(); |
| } |