| /* |
| * 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.axiom.testutils.io; |
| |
| import static org.junit.Assert.fail; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.Writer; |
| |
| /** |
| * {@link Writer} implementation that compares the data written to it with another character |
| * sequence specified by a {@link Reader}. |
| */ |
| public class CharacterStreamComparator extends Writer { |
| private final Reader in; |
| private final String name1; |
| private final String name2; |
| private final char[] compareBuffer = new char[1024]; |
| private int position; |
| |
| /** |
| * Constructor. |
| * |
| * @param in the stream to compare to |
| * @param name1 the name of the stream passed as argument; used in error messages |
| * @param name2 a name for the stream represented by the data written to this instance; used in |
| * error messages |
| */ |
| public CharacterStreamComparator(Reader in, String name1, String name2) { |
| this.in = in; |
| this.name1 = name1; |
| this.name2 = name2; |
| } |
| |
| @Deprecated |
| public CharacterStreamComparator(Reader in) { |
| this(in, "s1", "s2"); |
| } |
| |
| @Override |
| public void write(char[] buffer, int off, int len) throws IOException { |
| while (len > 0) { |
| int c = in.read(compareBuffer, 0, Math.min(compareBuffer.length, len)); |
| if (c == -1) { |
| fail( |
| "The two streams have different lengths: len(" |
| + name1 |
| + ") = " |
| + position |
| + " < len(" |
| + name2 |
| + ")"); |
| } |
| for (int i = 0; i < c; i++) { |
| if (buffer[off] != compareBuffer[i]) { |
| fail( |
| "Byte mismatch: " |
| + name1 |
| + "[" |
| + position |
| + "] = " |
| + compareBuffer[i] |
| + " != " |
| + name2 |
| + "[" |
| + position |
| + "] = " |
| + buffer[off]); |
| } |
| off++; |
| len--; |
| position++; |
| } |
| } |
| } |
| |
| @Override |
| public void flush() throws IOException {} |
| |
| @Override |
| public void close() throws IOException { |
| if (in.read() != -1) { |
| fail( |
| "The two streams have different lengths: len(" |
| + name1 |
| + ") > len(" |
| + name2 |
| + ") = " |
| + position); |
| } |
| } |
| } |