| package org.apache.samoa.core; |
| |
| /* |
| * #%L |
| * SAMOA |
| * %% |
| * Copyright (C) 2014 - 2015 Apache Software Foundation |
| * %% |
| * Licensed 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. |
| * #L% |
| */ |
| |
| import java.util.Arrays; |
| |
| import com.google.common.primitives.Doubles; |
| |
| public class DoubleVector implements java.io.Serializable { |
| |
| /** |
| * |
| */ |
| private static final long serialVersionUID = 8243012708860261398L; |
| |
| private double[] doubleArray; |
| |
| public DoubleVector() { |
| this.doubleArray = new double[0]; |
| } |
| |
| public DoubleVector(double[] toCopy) { |
| this.doubleArray = new double[toCopy.length]; |
| System.arraycopy(toCopy, 0, this.doubleArray, 0, toCopy.length); |
| } |
| |
| public DoubleVector(DoubleVector toCopy) { |
| this(toCopy.getArrayRef()); |
| } |
| |
| public double[] getArrayRef() { |
| return this.doubleArray; |
| } |
| |
| public double[] getArrayCopy() { |
| return Doubles.concat(this.doubleArray); |
| } |
| |
| public int numNonZeroEntries() { |
| int count = 0; |
| for (double element : this.doubleArray) { |
| if (Double.compare(element, 0.0) != 0) { |
| count++; |
| } |
| } |
| return count; |
| } |
| |
| public void setValue(int index, double value) { |
| if (index >= doubleArray.length) { |
| this.doubleArray = Doubles.ensureCapacity(this.doubleArray, index + 1, 0); |
| } |
| this.doubleArray[index] = value; |
| } |
| |
| public void addToValue(int index, double value) { |
| if (index >= doubleArray.length) { |
| this.doubleArray = Doubles.ensureCapacity(this.doubleArray, index + 1, 0); |
| } |
| this.doubleArray[index] += value; |
| } |
| |
| public double sumOfValues() { |
| double sum = 0.0; |
| for (double element : this.doubleArray) { |
| sum += element; |
| } |
| return sum; |
| } |
| |
| public void getSingleLineDescription(StringBuilder out) { |
| out.append("{"); |
| out.append(Doubles.join("|", this.doubleArray)); |
| out.append("}"); |
| } |
| |
| @Override |
| public String toString() { |
| return "DoubleVector [doubleArray=" + Arrays.toString(doubleArray) + "]"; |
| } |
| |
| @Override |
| public int hashCode() { |
| final int prime = 31; |
| int result = 1; |
| result = prime * result + Arrays.hashCode(doubleArray); |
| return result; |
| } |
| |
| @Override |
| public boolean equals(Object obj) { |
| if (this == obj) |
| return true; |
| if (obj == null) |
| return false; |
| if (!(obj instanceof DoubleVector)) |
| return false; |
| DoubleVector other = (DoubleVector) obj; |
| return Arrays.equals(doubleArray, other.doubleArray); |
| } |
| } |