001/*
002 * SPDX-License-Identifier: Apache-2.0
003 *
004 * Copyright 2024-2026 The Enola <https://enola.dev> Authors
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *     https://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package dev.enola.common.io.resource;
019
020import com.google.common.base.Optional;
021import com.google.common.io.ByteSource;
022
023import java.io.IOException;
024import java.io.InputStream;
025
026public final class ErrorByteSource extends ByteSource {
027
028    private final IOException error;
029
030    public ErrorByteSource(IOException ioException) {
031        this.error = ioException;
032    }
033
034    @Override
035    public InputStream openStream() throws IOException {
036        return new ErrorInputStream();
037    }
038
039    @Override
040    public Optional<Long> sizeIfKnown() {
041        return Optional.of(0L);
042    }
043
044    private final class ErrorInputStream extends InputStream {
045        @Override
046        public int read() throws IOException {
047            throw error;
048        }
049    }
050}