| // Copyright 2009 The Apache Software Foundation |
| // |
| // 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.apache.tapestry5.internal.pageload; |
| |
| import org.apache.tapestry5.internal.parser.TemplateToken; |
| import org.apache.tapestry5.internal.parser.TokenType; |
| |
| import java.util.List; |
| |
| class TokenStreamImpl implements TokenStream |
| { |
| private final List<TemplateToken> tokens; |
| |
| private int index = 0; |
| |
| TokenStreamImpl(List<TemplateToken> tokens) |
| { |
| this.tokens = tokens; |
| } |
| |
| public boolean more() |
| { |
| return index < tokens.size(); |
| } |
| |
| public TokenType peekType() |
| { |
| checkMore(); |
| |
| return tokens.get(index).getTokenType(); |
| } |
| |
| private void checkMore() |
| { |
| if (!more()) |
| throw new IllegalStateException(PageloadMessages.noMoreTokens()); |
| } |
| |
| public <T extends TemplateToken> T next(Class<T> type) |
| { |
| return type.cast(next()); |
| } |
| |
| public TemplateToken next() |
| { |
| checkMore(); |
| |
| return tokens.get(index++); |
| } |
| } |