| /** |
| * 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.avro.io; |
| |
| import java.io.IOException; |
| import java.util.Arrays; |
| |
| import org.apache.avro.AvroTypeException; |
| |
| /** Base class for <a href="parsing/package-summary.html">parser</a>-based |
| * {@link Encoder}s. */ |
| public abstract class ParsingEncoder extends Encoder { |
| /** |
| * Tracks the number of items that remain to be written in |
| * the collections (array or map). |
| */ |
| private long[] counts = new long[10]; |
| |
| protected int pos = -1; |
| |
| @Override |
| public void setItemCount(long itemCount) throws IOException { |
| if (counts[pos] != 0) { |
| throw new AvroTypeException("Incorrect number of items written. " + |
| counts[pos] + " more required."); |
| } |
| counts[pos] = itemCount; |
| } |
| |
| @Override |
| public void startItem() throws IOException { |
| counts[pos]--; |
| } |
| |
| /** Push a new collection on to the stack. */ |
| protected final void push() { |
| if (++pos == counts.length) { |
| counts = Arrays.copyOf(counts, pos + 10); |
| } |
| counts[pos] = 0; |
| } |
| |
| protected final void pop() { |
| if (counts[pos] != 0) { |
| throw new AvroTypeException("Incorrect number of items written. " + |
| counts[pos] + " more required."); |
| } |
| pos--; |
| } |
| |
| protected final int depth() { |
| return pos; |
| } |
| } |
| |