findepi commented on code in PR #4534: URL: https://github.com/apache/iceberg/pull/4534#discussion_r851238637
########## core/src/test/java/org/apache/iceberg/io/InMemoryInputFile.java: ########## @@ -0,0 +1,130 @@ +/* + * 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.iceberg.io; + +import java.io.ByteArrayInputStream; +import java.io.IOException; +import java.util.Objects; +import java.util.UUID; +import org.apache.iceberg.relocated.com.google.common.base.Preconditions; + +public class InMemoryInputFile implements InputFile { + + private final String location; + private final byte[] contents; + + public InMemoryInputFile(byte[] contents) { + this("memory:" + UUID.randomUUID(), contents); + } + + public InMemoryInputFile(String location, byte[] contents) { + this.location = Objects.requireNonNull(location, "location is null"); + this.contents = Objects.requireNonNull(contents, "contents is null").clone(); + } + + @Override + public long getLength() { + return contents.length; + } + + @Override + public SeekableInputStream newStream() { + return new InMemorySeekableInputStream(contents); + } + + @Override + public String location() { + return location; + } + + @Override + public boolean exists() { + return true; + } + + private static class InMemorySeekableInputStream extends SeekableInputStream { + + private final int length; + private final ByteArrayInputStream delegate; + + InMemorySeekableInputStream(byte[] contents) { + this.length = contents.length; + this.delegate = new ByteArrayInputStream(contents); + } + + @Override + public long getPos() throws IOException { + return length - delegate.available(); + } + + @Override + public void seek(long newPos) throws IOException { + delegate.reset(); + Preconditions.checkState(delegate.skip(newPos) == newPos, + "Invalid position %s within stream of length %s", newPos, length); + } + + @Override + public int read() { + return delegate.read(); + } + + @Override + public int read(byte[] b) throws IOException { + return delegate.read(b); + } + + @Override + public int read(byte[] b, int off, int len) { + return delegate.read(b, off, len); + } + + @Override + public long skip(long n) { + return delegate.skip(n); + } + + @Override + public int available() { + return delegate.available(); + } + + @Override + public boolean markSupported() { + throw new UnsupportedOperationException(); + } + + @Override + public void mark(int readAheadLimit) { + // We use mark to implement seek Review Comment: in seek(), the `delegate.reset()` resets to a marked position, will add a comment -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
