| /* |
| * 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 |
| * |
| * https://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.directory.api.dsmlv2; |
| |
| |
| import java.io.IOException; |
| import java.util.HashMap; |
| |
| import org.apache.directory.api.i18n.I18n; |
| import org.apache.directory.api.util.Strings; |
| import org.xmlpull.v1.XmlPullParser; |
| import org.xmlpull.v1.XmlPullParserException; |
| |
| |
| /** |
| * The abstract Grammar which is the Mother of all the grammars. It contains |
| * the transitions table. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public abstract class AbstractGrammar implements Grammar |
| { |
| /** |
| * Table of transitions. It's a two dimension array, the first dimension |
| * indexes the states, the second dimension indexes the Tag value, so it is |
| * 256 wide. |
| */ |
| protected HashMap<Tag, GrammarTransition>[] transitions; |
| |
| /** The grammar name */ |
| protected String name; |
| |
| |
| /** |
| * Returns the grammar's name |
| * |
| * @return The grammar name |
| */ |
| @Override |
| public String getName() |
| { |
| return name; |
| } |
| |
| |
| /** |
| * Sets the grammar's name |
| * |
| * @param name the name to set |
| */ |
| @Override |
| public void setName( String name ) |
| { |
| this.name = name; |
| } |
| |
| |
| /** |
| * Gets the transition associated with the state and tag |
| * |
| * @param state The current state |
| * @param tag The current tag |
| * @return A valid transition if any, or null. |
| */ |
| public GrammarTransition getTransition( Enum<Dsmlv2StatesEnum> state, Tag tag ) |
| { |
| return transitions[state.ordinal()].get( tag ); |
| } |
| |
| |
| /** |
| * Gets the states of the current grammar |
| * |
| * @return Returns the statesEnum. |
| */ |
| @Override |
| public Enum<Dsmlv2StatesEnum>[] getStatesEnum() |
| { |
| return Dsmlv2StatesEnum.values(); |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| @Override |
| public void executeAction( Dsmlv2Container container ) throws XmlPullParserException, IOException |
| { |
| XmlPullParser xpp = container.getParser(); |
| |
| int eventType = xpp.getEventType(); |
| |
| do |
| { |
| switch ( eventType ) |
| { |
| case XmlPullParser.START_DOCUMENT: |
| container.setState( Dsmlv2StatesEnum.INIT_GRAMMAR_STATE ); |
| break; |
| |
| case XmlPullParser.END_DOCUMENT: |
| container.setState( Dsmlv2StatesEnum.GRAMMAR_END ); |
| break; |
| |
| case XmlPullParser.START_TAG: |
| processTag( container, Tag.START ); |
| break; |
| |
| case XmlPullParser.END_TAG: |
| processTag( container, Tag.END ); |
| break; |
| |
| default: |
| break; |
| } |
| |
| eventType = xpp.next(); |
| } |
| while ( eventType != XmlPullParser.END_DOCUMENT ); |
| } |
| |
| |
| /** |
| * Processes the task required in the grammar to the given tag type |
| * |
| * @param container the DSML container |
| * @param tagType the tag type |
| * @throws XmlPullParserException when an error occurs during the parsing |
| */ |
| private void processTag( Dsmlv2Container container, int tagType ) throws XmlPullParserException |
| { |
| XmlPullParser xpp = container.getParser(); |
| |
| String tagName = Strings.toLowerCaseAscii( xpp.getName() ); |
| |
| GrammarTransition transition = getTransition( container.getState(), new Tag( tagName, tagType ) ); |
| |
| if ( transition != null ) |
| { |
| container.setState( transition.getNextState() ); |
| |
| if ( transition.hasAction() ) |
| { |
| GrammarAction action = transition.getAction(); |
| action.action( container ); |
| } |
| } |
| else |
| { |
| throw new XmlPullParserException( I18n.err( I18n.ERR_03036_MISSING_TAG, new Tag( tagName, tagType ) ), xpp, null ); |
| } |
| } |
| } |