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130 changes: 130 additions & 0 deletions
130
parquet-column/src/main/java/org/apache/parquet/column/statistics/NoopStatistics.java
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| @@ -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.parquet.column.statistics; | ||
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| import org.apache.parquet.io.api.Binary; | ||
| import org.apache.parquet.schema.PrimitiveType; | ||
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| /** | ||
| * A noop statistics which always return empty. | ||
| */ | ||
| class NoopStatistics<T extends Comparable<T>> extends Statistics<T> { | ||
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| NoopStatistics(PrimitiveType type) { | ||
| super(type); | ||
| } | ||
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| @Override | ||
| public void updateStats(int value) {} | ||
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| @Override | ||
| public void updateStats(long value) {} | ||
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| @Override | ||
| public void updateStats(float value) {} | ||
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| @Override | ||
| public void updateStats(double value) {} | ||
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| @Override | ||
| public void updateStats(boolean value) {} | ||
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| @Override | ||
| public void updateStats(Binary value) {} | ||
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| @Override | ||
| public boolean equals(Object other) { | ||
| if (other == this) return true; | ||
| if (!(other instanceof Statistics)) return false; | ||
| Statistics stats = (Statistics) other; | ||
| return type().equals(stats.type()); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return 31 * type().hashCode(); | ||
| } | ||
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| @Override | ||
| protected void mergeStatisticsMinMax(Statistics stats) {} | ||
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| @Override | ||
| public void setMinMaxFromBytes(byte[] minBytes, byte[] maxBytes) {} | ||
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| @Override | ||
| public T genericGetMin() { | ||
| throw new UnsupportedOperationException( | ||
| "genericGetMin is not supported by " + getClass().getName()); | ||
| } | ||
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| @Override | ||
| public T genericGetMax() { | ||
| throw new UnsupportedOperationException( | ||
| "genericGetMax is not supported by " + getClass().getName()); | ||
| } | ||
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| @Override | ||
| public byte[] getMaxBytes() { | ||
| throw new UnsupportedOperationException( | ||
| "getMaxBytes is not supported by " + getClass().getName()); | ||
| } | ||
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| @Override | ||
| public byte[] getMinBytes() { | ||
| throw new UnsupportedOperationException( | ||
| "getMinBytes is not supported by " + getClass().getName()); | ||
| } | ||
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| @Override | ||
| String stringify(T value) { | ||
| throw new UnsupportedOperationException( | ||
| "stringify is not supported by " + getClass().getName()); | ||
| } | ||
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| @Override | ||
| public boolean isSmallerThan(long size) { | ||
| throw new UnsupportedOperationException( | ||
| "isSmallerThan is not supported by " + getClass().getName()); | ||
| } | ||
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| @Override | ||
| public long getNumNulls() { | ||
| return -1; | ||
| } | ||
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| @Override | ||
| public boolean isEmpty() { | ||
| return true; | ||
| } | ||
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| @Override | ||
| public boolean hasNonNullValue() { | ||
| return false; | ||
| } | ||
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| @Override | ||
| public boolean isNumNullsSet() { | ||
| return false; | ||
| } | ||
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| @Override | ||
| public Statistics<T> copy() { | ||
| return new NoopStatistics<>(this.type()); | ||
| } | ||
| } |
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