| /* |
| * 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 freemarker.core; |
| |
| import java.math.BigInteger; |
| |
| import freemarker.template.SimpleNumber; |
| import freemarker.template.TemplateCollectionModel; |
| import freemarker.template.TemplateModel; |
| import freemarker.template.TemplateModelException; |
| import freemarker.template.TemplateModelIterator; |
| |
| /** |
| * This is the model used for right-unbounded ranges since Incompatible Improvements 2.3.21. |
| * |
| * @since 2.3.21 |
| */ |
| final class ListableRightUnboundedRangeModel extends RightUnboundedRangeModel implements TemplateCollectionModel { |
| |
| ListableRightUnboundedRangeModel(int begin) { |
| super(begin); |
| } |
| |
| @Override |
| public int size() throws TemplateModelException { |
| return Integer.MAX_VALUE; |
| } |
| |
| @Override |
| public TemplateModelIterator iterator() throws TemplateModelException { |
| return new TemplateModelIterator() { |
| boolean needInc; |
| int nextType = 1; |
| int nextInt = getBegining(); |
| long nextLong; |
| BigInteger nextBigInteger; |
| |
| @Override |
| public TemplateModel next() throws TemplateModelException { |
| if (needInc) { |
| switch (nextType) { |
| case 1: |
| if (nextInt < Integer.MAX_VALUE) { |
| nextInt++; |
| } else { |
| nextType = 2; |
| nextLong = nextInt + 1L; |
| } |
| break; |
| |
| case 2: |
| if (nextLong < Long.MAX_VALUE) { |
| nextLong++; |
| } else { |
| nextType = 3; |
| nextBigInteger = BigInteger.valueOf(nextLong); |
| nextBigInteger = nextBigInteger.add(BigInteger.ONE); |
| } |
| break; |
| |
| default: // 3 |
| nextBigInteger = nextBigInteger.add(BigInteger.ONE); |
| } |
| } |
| needInc = true; |
| return nextType == 1 ? new SimpleNumber(nextInt) |
| : (nextType == 2 ? new SimpleNumber(nextLong) |
| : new SimpleNumber(nextBigInteger)); |
| } |
| |
| @Override |
| public boolean hasNext() throws TemplateModelException { |
| return true; |
| } |
| |
| }; |
| |
| } |
| |
| } |