95 lines
2.5 KiB
Java
95 lines
2.5 KiB
Java
/*
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* Copyright (C) 2012 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.io;
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import static com.google.common.base.Preconditions.checkNotNull;
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import static com.google.common.io.TestOption.CLOSE_THROWS;
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import static com.google.common.io.TestOption.OPEN_THROWS;
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import static com.google.common.io.TestOption.READ_THROWS;
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import static com.google.common.io.TestOption.SKIP_THROWS;
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import com.google.common.collect.ImmutableSet;
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import java.io.FilterInputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.Arrays;
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/** @author Colin Decker */
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public class TestInputStream extends FilterInputStream {
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private final ImmutableSet<TestOption> options;
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private boolean closed;
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public TestInputStream(InputStream in, TestOption... options) throws IOException {
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this(in, Arrays.asList(options));
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}
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public TestInputStream(InputStream in, Iterable<TestOption> options) throws IOException {
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super(checkNotNull(in));
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this.options = ImmutableSet.copyOf(options);
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throwIf(OPEN_THROWS);
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}
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public boolean closed() {
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return closed;
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}
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@Override
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public int read() throws IOException {
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throwIf(closed);
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throwIf(READ_THROWS);
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return in.read();
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}
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@Override
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public int read(byte[] b, int off, int len) throws IOException {
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throwIf(closed);
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throwIf(READ_THROWS);
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return in.read(b, off, len);
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}
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@Override
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public long skip(long n) throws IOException {
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throwIf(closed);
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throwIf(SKIP_THROWS);
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return in.skip(n);
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}
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@Override
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public int available() throws IOException {
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throwIf(closed);
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return options.contains(TestOption.AVAILABLE_ALWAYS_ZERO) ? 0 : in.available();
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}
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@Override
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public void close() throws IOException {
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closed = true;
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throwIf(CLOSE_THROWS);
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in.close();
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}
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private void throwIf(TestOption option) throws IOException {
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throwIf(options.contains(option));
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}
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private static void throwIf(boolean condition) throws IOException {
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if (condition) {
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throw new IOException();
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}
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}
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}
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