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Array.java
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Array.java
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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
* "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.sysds.runtime.frame.data.columns;
import java.lang.ref.SoftReference;
import java.util.HashMap;
import org.apache.commons.lang.NotImplementedException;
import org.apache.hadoop.io.Writable;
import org.apache.sysds.common.Types.ValueType;
/**
* generic, resizable native arrays
*
* Base class for generic, resizable array of various value types. We use this custom class hierarchy instead of Trove
* or other libraries in order to avoid unnecessary dependencies.
*/
public abstract class Array<T> implements Writable {
protected SoftReference<HashMap<String, Long>> _rcdMapCache = null;
protected int _size = 0;
protected int newSize() {
return Math.max(_size * 2, 4);
}
public abstract T get(int index);
/**
* Get the underlying array out of the column Group, it is the responsibility of the caller to know what type it is
*
* @return The underlying array.
*/
public abstract Object get();
public final SoftReference<HashMap<String, Long>> getCache(){
return _rcdMapCache;
}
public final void setCache(SoftReference<HashMap<String, Long>> m){
_rcdMapCache = m;
}
public final int size(){
return _size;
}
public abstract void set(int index, T value);
public abstract void set(int rl, int ru, Array<T> value);
public abstract void set(int rl, int ru, Array<T> value, int rlSrc);
public abstract void setNz(int rl, int ru, Array<T> value);
public abstract void append(String value);
public abstract void append(T value);
@Override
public abstract Array<T> clone();
public abstract Array<T> slice(int rl, int ru);
public abstract void reset(int size);
public abstract byte[] getAsByteArray(int nRow);
public abstract ValueType getValueType();
@Override
public String toString() {
return this.getClass().getSimpleName();
}
}