org.apache.parquet.column.page.DictionaryPage Maven / Gradle / Ivy
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* 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
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* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.parquet.column.page;
import java.io.IOException;
import java.util.Objects;
import org.apache.parquet.bytes.BytesInput;
import org.apache.parquet.column.Encoding;
/**
* Data for a dictionary page
*/
public class DictionaryPage extends Page {
private final BytesInput bytes;
private final int dictionarySize;
private final Encoding encoding;
/**
* creates an uncompressed page
*
* @param bytes the content of the page
* @param dictionarySize the value count in the dictionary
* @param encoding the encoding used
*/
public DictionaryPage(BytesInput bytes, int dictionarySize, Encoding encoding) {
this(bytes, (int) bytes.size(), dictionarySize, encoding); // TODO: fix sizes long or int
}
/**
* creates a dictionary page
*
* @param bytes the (possibly compressed) content of the page
* @param uncompressedSize the size uncompressed
* @param dictionarySize the value count in the dictionary
* @param encoding the encoding used
*/
public DictionaryPage(BytesInput bytes, int uncompressedSize, int dictionarySize, Encoding encoding) {
super(Math.toIntExact(bytes.size()), uncompressedSize);
this.bytes = Objects.requireNonNull(bytes, "bytes cannot be null");
this.dictionarySize = dictionarySize;
this.encoding = Objects.requireNonNull(encoding, "encoding cannot be null");
}
public BytesInput getBytes() {
return bytes;
}
public int getDictionarySize() {
return dictionarySize;
}
public Encoding getEncoding() {
return encoding;
}
public DictionaryPage copy() throws IOException {
return new DictionaryPage(BytesInput.copy(bytes), getUncompressedSize(), dictionarySize, encoding);
}
@Override
public String toString() {
return "Page [bytes.size=" + bytes.size() + ", entryCount=" + dictionarySize + ", uncompressedSize="
+ getUncompressedSize() + ", encoding=" + encoding + "]";
}
}