org.apache.hudi.common.util.hash.ColumnIndexID Maven / Gradle / Ivy
/*
* 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.hudi.common.util.hash;
import org.apache.hudi.common.util.Base64CodecUtil;
/**
* A stateful Hoodie object ID representing any table column.
*/
public class ColumnIndexID extends HoodieIndexID {
private static final Type TYPE = Type.COLUMN;
public static final HashID.Size ID_COLUMN_HASH_SIZE = HashID.Size.BITS_64;
private final String column;
private final byte[] hash;
public ColumnIndexID(final String column) {
this.column = column;
this.hash = HashID.hash(column, ID_COLUMN_HASH_SIZE);
}
@Override
public String getName() {
return column;
}
@Override
public int bits() {
return ID_COLUMN_HASH_SIZE.byteSize();
}
@Override
public byte[] asBytes() {
return this.hash;
}
@Override
public String asBase64EncodedString() {
return Base64CodecUtil.encode(this.hash);
}
@Override
public String toString() {
return new String(this.hash);
}
@Override
protected Type getType() {
return TYPE;
}
}