| /* |
| * 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.samoa.instances; |
| |
| public class DenseInstanceData implements InstanceData { |
| |
| /** |
| * Instantiates a new dense instance data. |
| * |
| * @param array |
| * the array |
| */ |
| public DenseInstanceData(double[] array) { |
| this.attributeValues = array; |
| } |
| |
| /** |
| * Instantiates a new dense instance data. |
| * |
| * @param length |
| * the length |
| */ |
| public DenseInstanceData(int length) { |
| this.attributeValues = new double[length]; |
| } |
| |
| /** |
| * Instantiates a new dense instance data. |
| */ |
| public DenseInstanceData() { |
| this(0); |
| } |
| |
| /** The attribute values. */ |
| protected double[] attributeValues; |
| |
| /** |
| * Num attributes. |
| * |
| * @return the int |
| */ |
| @Override |
| public int numAttributes() { |
| return this.attributeValues.length; |
| } |
| |
| /** |
| * Value. |
| * |
| * @param indexAttribute |
| * the index attribute |
| * @return the double |
| */ |
| @Override |
| public double value(int indexAttribute) { |
| if (this.attributeValues.length <= indexAttribute) |
| return this.attributeValues[this.attributeValues.length - 1]; |
| |
| return this.attributeValues[indexAttribute]; |
| } |
| |
| /** |
| * Checks if is missing. |
| * |
| * @param indexAttribute |
| * the index attribute |
| * @return true, if is missing |
| */ |
| @Override |
| public boolean isMissing(int indexAttribute) { |
| return Double.isNaN(this.value(indexAttribute)); |
| } |
| |
| /** |
| * Num values. |
| * |
| * @return the int |
| */ |
| @Override |
| public int numValues() { |
| return numAttributes(); |
| } |
| |
| /** |
| * Index. |
| * |
| * @param indexAttribute |
| * the index attribute |
| * @return the int |
| */ |
| @Override |
| public int index(int indexAttribute) { |
| return indexAttribute; |
| } |
| |
| /** |
| * Value sparse. |
| * |
| * @param indexAttribute |
| * the index attribute |
| * @return the double |
| */ |
| @Override |
| public double valueSparse(int indexAttribute) { |
| return value(indexAttribute); |
| } |
| |
| /** |
| * Checks if is missing sparse. |
| * |
| * @param indexAttribute |
| * the index attribute |
| * @return true, if is missing sparse |
| */ |
| @Override |
| public boolean isMissingSparse(int indexAttribute) { |
| return isMissing(indexAttribute); |
| } |
| |
| /** |
| * To double array. |
| * |
| * @return the double[] |
| */ |
| @Override |
| public double[] toDoubleArray() { |
| return attributeValues; |
| } |
| |
| /** |
| * Sets the value. |
| * |
| * @param attributeIndex |
| * the attribute index |
| * @param d |
| * the d |
| */ |
| @Override |
| public void setValue(int attributeIndex, double d) { |
| this.attributeValues[attributeIndex] = d; |
| } |
| |
| @Override |
| public void deleteAttributeAt(int index) { |
| |
| double[] newValues = new double[attributeValues.length - 1]; |
| |
| System.arraycopy(attributeValues, 0, newValues, 0, index); |
| if (index < attributeValues.length - 1) { |
| System.arraycopy(attributeValues, index + 1, newValues, index, |
| attributeValues.length - (index + 1)); |
| } |
| attributeValues = newValues; |
| } |
| |
| @Override |
| public void insertAttributeAt(int index) { |
| if ((index < 0) || (index > numAttributes())) { |
| throw new IllegalArgumentException("Can't insert attribute: index out " |
| + "of range"); |
| } |
| double[] newValues = new double[attributeValues.length + 1]; |
| |
| System.arraycopy(attributeValues, 0, newValues, 0, index); |
| newValues[index] = Double.NaN; //Missing Value |
| System.arraycopy(attributeValues, index, newValues, index + 1, |
| attributeValues.length - index); |
| attributeValues = newValues; |
| |
| } |
| |
| @Override |
| public InstanceData copy() { |
| return new DenseInstanceData(this.attributeValues); |
| } |
| |
| } |