edu.ucla.sspace.util.Properties Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of sspace-wordsi Show documentation

The S-Space Package is a collection of algorithms for building Semantic Spaces as well as a highly-scalable library for designing new distributional semantics algorithms. Distributional algorithms process text corpora and represent the semantic for words as high dimensional feature vectors. This package also includes matrices, vectors, and numerous clustering algorithms. These approaches are known by many names, such as word spaces, semantic spaces, or distributed semantics and rest upon the Distributional Hypothesis: words that appear in similar contexts have similar meanings.

The newest version!

/*
 * Copyright 2010 Keith Stevens 
 *
 * This file is part of the S-Space package and is covered under the terms and
 * conditions therein.
 *
 * The S-Space package is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as published
 * by the Free Software Foundation and distributed hereunder to you.
 *
 * THIS SOFTWARE IS PROVIDED "AS IS" AND NO REPRESENTATIONS OR WARRANTIES,
 * EXPRESS OR IMPLIED ARE MADE.  BY WAY OF EXAMPLE, BUT NOT LIMITATION, WE MAKE
 * NO REPRESENTATIONS OR WARRANTIES OF MERCHANT- ABILITY OR FITNESS FOR ANY
 * PARTICULAR PURPOSE OR THAT THE USE OF THE LICENSED SOFTWARE OR DOCUMENTATION
 * WILL NOT INFRINGE ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADEMARKS OR OTHER
 * RIGHTS.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see .
 */

package edu.ucla.sspace.util;


/**
 * A simple wrapper around {@link java.util.Properties} that provides methods
 * that interpret properties based on the type of the default value.
 *
 * @author Keith Stevens
 */
public class Properties {

  /**
   * The underlying properties intsance.
   */
  private final java.util.Properties props;

  /**
   * Creates a new {@link Properties} object from the system provided
   * properties.
   */
  public Properties() {
    this(System.getProperties());
  }

  /**
   * Creates a new {@link Properties} object from the provided properties.
   */
  public Properties(java.util.Properties props) {
    this.props = props;
  }

  /**
   * Returns the string property associated with {@code propName}
   */
  public String getProperty(String propName) {
    return props.getProperty(propName);
  }

  /**
   * Returns the string property associated with {@code propName}, or {@code
   * defaultValue} if there is no property.
   */
  public String getProperty(String propName, String defaultValue) {
    return props.getProperty(propName, defaultValue);
  }

  /**
   * Returns the integer value of the property associated with {@code propName},
   * or {@code defaultValue} if there is no property.
   */
  public int getProperty(String propName, int defaultValue) {
    String propValue = props.getProperty(propName);
    return (propValue == null) ? defaultValue : Integer.parseInt(propValue);
  }

  /**
   * Returns the double value of the property associated with {@code propName},
   * or {@code defaultValue} if there is no property.
   */
  public double getProperty(String propName, double defaultValue) {
    String propValue = props.getProperty(propName);
    return (propValue == null) ? defaultValue : Double.parseDouble(propValue);
  }

  /**
   * Returns a class instance of the property associated with {@code propName},
   * or {@code defaultValue} if there is no property.  This method assumes that
   * the class has a no argument constructor.
   */
  @SuppressWarnings("unchecked")
  public  T getProperty(String propName, T defaultValue) {
    String propValue = props.getProperty(propName);
    if (propValue == null)
      return defaultValue;
    return ReflectionUtil.getObjectInstance(propValue);
  }
}