| /* |
| * Copyright (C) 2012 The Guava Authors |
| * |
| * 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 com.google.common.io; |
| |
| import static com.google.common.base.Preconditions.checkNotNull; |
| import static com.google.common.io.TestOption.CLOSE_THROWS; |
| import static com.google.common.io.TestOption.OPEN_THROWS; |
| import static com.google.common.io.TestOption.READ_THROWS; |
| import static com.google.common.io.TestOption.SKIP_THROWS; |
| |
| import com.google.common.collect.ImmutableSet; |
| import java.io.FilterInputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.util.Arrays; |
| |
| /** @author Colin Decker */ |
| public class TestInputStream extends FilterInputStream { |
| |
| private final ImmutableSet<TestOption> options; |
| private boolean closed; |
| |
| public TestInputStream(InputStream in, TestOption... options) throws IOException { |
| this(in, Arrays.asList(options)); |
| } |
| |
| public TestInputStream(InputStream in, Iterable<TestOption> options) throws IOException { |
| super(checkNotNull(in)); |
| this.options = ImmutableSet.copyOf(options); |
| throwIf(OPEN_THROWS); |
| } |
| |
| public boolean closed() { |
| return closed; |
| } |
| |
| @Override |
| public int read() throws IOException { |
| throwIf(closed); |
| throwIf(READ_THROWS); |
| return in.read(); |
| } |
| |
| @Override |
| public int read(byte[] b, int off, int len) throws IOException { |
| throwIf(closed); |
| throwIf(READ_THROWS); |
| return in.read(b, off, len); |
| } |
| |
| @Override |
| public long skip(long n) throws IOException { |
| throwIf(closed); |
| throwIf(SKIP_THROWS); |
| return in.skip(n); |
| } |
| |
| @Override |
| public int available() throws IOException { |
| throwIf(closed); |
| return options.contains(TestOption.AVAILABLE_ALWAYS_ZERO) ? 0 : in.available(); |
| } |
| |
| @Override |
| public void close() throws IOException { |
| closed = true; |
| throwIf(CLOSE_THROWS); |
| in.close(); |
| } |
| |
| private void throwIf(TestOption option) throws IOException { |
| throwIf(options.contains(option)); |
| } |
| |
| private static void throwIf(boolean condition) throws IOException { |
| if (condition) { |
| throw new IOException(); |
| } |
| } |
| } |