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Java example source code file (Window.java)

This example Java source code file (Window.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

a-z, arraylist, begin_label, end_label, illegalargumentexception, list, none, override, serializable, string, util, window, words

The Window.java Java example source code

/*
 *
 *  * Copyright 2015 Skymind,Inc.
 *  *
 *  *    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.
 *
 */

package org.deeplearning4j.text.movingwindow;

import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;

import org.apache.commons.lang3.StringUtils;


/**
 * A representation of a sliding window.
 * This is used for creating training examples.
 * @author Adam Gibson
 *
 */
public class Window implements Serializable {
	/**
	 * 
	 */
	private static final long serialVersionUID = 6359906393699230579L;
	private List<String> words;
	private String label = "NONE";
	private boolean beginLabel;
	private boolean endLabel;
	private int windowSize;
	private int median;
	private static String BEGIN_LABEL = "<([A-Z]+|\\d+)>";
	private static String END_LABEL = "</([A-Z]+|\\d+)>";
    private int begin,end;

	/**
	 * Creates a window with a context of size 3
	 * @param words a collection of strings of size 3
	 */
	public Window(Collection<String> words,int begin,int end) {
		this(words,5,begin,end);

	}

	public String asTokens() {
		return StringUtils.join(words, " ");
	}


	/**
	 * Initialize a window with the given size
	 * @param words the words to use 
	 * @param windowSize the size of the window
     * @param begin the begin index for the window
     * @param end the end index for the window
	 */
	public Window(Collection<String> words, int windowSize,int begin,int end) {
		if(words == null)
			throw new IllegalArgumentException("Words must be a list of size 3");

		this.words = new ArrayList<>(words);
		this.windowSize = windowSize;
        this.begin = begin;
        this.end = end;
		initContext();
	}


	private void initContext() {
		int median = (int) Math.floor(words.size() / 2);
		List<String> begin = words.subList(0, median);
		List<String> after = words.subList(median + 1,words.size());


		for(String s : begin) {
			if(s.matches(BEGIN_LABEL)) {
				this.label = s.replaceAll("(<|>)","").replace("/","");
				beginLabel = true;
			}
			else if(s.matches(END_LABEL)) {
				endLabel = true;
				this.label = s.replaceAll("(<|>|/)","").replace("/","");

			}

		}

		for(String s1 : after) {

            if(s1.matches(BEGIN_LABEL)) {
                this.label = s1.replaceAll("(<|>)","").replace("/","");
                beginLabel = true;
            }

			if(s1.matches(END_LABEL)) {
				endLabel = true;
				this.label = s1.replaceAll("(<|>)","");

			}
		}
		this.median = median;

	}


	
	
	
	@Override
	public String toString() {
		return words.toString();
	}

	public List<String> getWords() {
		return words;
	}

	public void setWords(List<String> words) {
		this.words = words;
	}

	public String getWord(int i) {
		return words.get(i);
	}

	public String getFocusWord() {
		return words.get(median);
	}

	public boolean isBeginLabel() {
		return !label.equals("NONE") && beginLabel;
	}

	public boolean isEndLabel() {
		return !label.equals("NONE") && endLabel;
	}

	public String getLabel() {
		return label.replace("/","");
	}

	public int getWindowSize() {
		return words.size();
	}

	public int getMedian() {
		return median;
	}

	public void setLabel(String label) {
		this.label = label;
	}

    public int getBegin() {
        return begin;
    }

    public void setBegin(int begin) {
        this.begin = begin;
    }

    public int getEnd() {
        return end;
    }

    public void setEnd(int end) {
        this.end = end;
    }


}

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