// Path: src/com/structed/data/entities/Vector.java
// public class Vector extends HashMap<Integer, Double> implements Serializable{
// 
//     private static final long serialVersionUID = 1L;
//     private int maxIndex;
//     public Vector(){this.maxIndex = -1;}
//     public Vector(Vector v){
//         super(v);
//     }
// 
//     @Override
//     public Double put(Integer key, Double value){
//         super.put(key, value);
//         if(maxIndex < key) maxIndex = key;
//         return value;
//     }
// 
//     // getter
//     public int getMaxIndex() {
//         return maxIndex;
//     }
//     public void resetMaxIndex(){
//         this.maxIndex = -1;
//     }
// }


import com.structed.data.entities.Vector;
/*
 * The MIT License (MIT)
 *
 * StructED - Machine Learning Package for Structured Prediction
 *
 * Copyright (c) 2015 Yossi Adi, E-Mail: yossiadidrum@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.structed.models.kernels;


/**
 * Poly 2 kernel
 */
public class Poly2Kernel implements IKernel {

    @Override
    //new dimension = d + d*(d-1)/2.0
// Path: src/com/structed/data/entities/Vector.java
// public class Vector extends HashMap<Integer, Double> implements Serializable{
// 
//     private static final long serialVersionUID = 1L;
//     private int maxIndex;
//     public Vector(){this.maxIndex = -1;}
//     public Vector(Vector v){
//         super(v);
//     }
// 
//     @Override
//     public Double put(Integer key, Double value){
//         super.put(key, value);
//         if(maxIndex < key) maxIndex = key;
//         return value;
//     }
// 
//     // getter
//     public int getMaxIndex() {
//         return maxIndex;
//     }
//     public void resetMaxIndex(){
//         this.maxIndex = -1;
//     }
// }


// Path: src/com/structed/models/kernels/Poly2Kernel.java
import com.structed.data.entities.Vector;

/*
 * The MIT License (MIT)
 *
 * StructED - Machine Learning Package for Structured Prediction
 *
 * Copyright (c) 2015 Yossi Adi, E-Mail: yossiadidrum@gmail.com
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.structed.models.kernels;


/**
 * Poly 2 kernel
 */
public class Poly2Kernel implements IKernel {

    @Override
    //new dimension = d + d*(d-1)/2.0
    public Vector convertVector(Vector vector, int vectorSize)