io.bigdime.core.commons.PropertyHelper Maven / Gradle / Ivy

Go to download
/**
 * Copyright (C) 2015 Stubhub.
 */
package io.bigdime.core.commons;

import java.util.Map;

/**
 * Utility class to get the property from the map.
 * 
 * @author Neeraj Jain
 *
 */
public final class PropertyHelper {
	private static final PropertyHelper instance = new PropertyHelper();

	private PropertyHelper() {
	}

	public static PropertyHelper getInstance() {
		return instance;
	}

	/**
	 * Get the property from propertyMap return an int value for it. If the
	 * property does not exist, throw a RuntimeException.
	 * 
	 * @param propertyMap
	 *            map to for the property in
	 * @param name
	 *            name of the property
	 * @return int value of of the property if the property is found and has a
	 *         value in int range.
	 * @throws RuntimeException
	 *             if the property with name specified by argument name does not
	 *             exist in propertyMap.
	 */
	public static int getIntProperty(Map propertyMap, String name) {
		return getIntProperty(propertyMap.get(name));
	}

	/**
	 * Get the property from propertyMap return an integer value for it.
	 * 
	 * @param propertyMap
	 *            map to look for the property in
	 * @param name
	 *            name of the property to look for
	 * @param defaultValue
	 *            value to be returned in case property with name argument is
	 *            not present in the map
	 * @return integer value of the property if the property is found and has a
	 *         value in integer range. Returns value specified by defalutValue
	 *         argument if the property with name argument doesn't exist.
	 * @throws NumberFormatException
	 *             if the property's value cannot be parsed as an integer.
	 */
	public static int getIntProperty(Map propertyMap, String name, int defaultValue) {
		return getIntProperty(propertyMap.get(name), defaultValue);
	}

	/**
	 * Get the integer value of Object value and return the same. If the value
	 * is null or is not a number, the default value is returned.
	 * 
	 * @param value
	 *            Object with integer value
	 * @param defaultValue
	 *            value to be returned if the value argument is null or not a
	 *            number
	 * @return
	 */
	public static int getIntProperty(Object value, int defaultValue) {
		try {
			return getIntProperty(value);
		} catch (Exception ex) {
			return defaultValue;
		}
	}

	/**
	 * Get the integer value of Object value and return the same. If the value
	 * is null or is not a number, an exception is thrown.
	 * 
	 * @param value
	 *            Object with integer value
	 */
	public static int getIntProperty(Object value) {
		if (value == null) {
			throw new RuntimeException("value is null");
		} else {
			return Integer.valueOf(value.toString());
		}
	}

	/**
	 * Get the long value of Object value and return the same. If the value is
	 * null or is not a number, the default value is returned.
	 * 
	 * @param value
	 *            Object with long value
	 * @param defaultValue
	 *            value to be returned if the value argument is null or not a
	 *            number
	 * @return
	 */
	public static long getLongProperty(Object value, long defaultValue) {
		try {
			return getLongProperty(value);
		} catch (Exception ex) {
			return defaultValue;
		}
	}

	/**
	 * Get the long value of Object value and return the same. If the value is
	 * null or is not a number, an exception is thrown.
	 * 
	 * @param value
	 *            Object with long value
	 */
	public static long getLongProperty(Object value) {
		if (value == null) {
			throw new RuntimeException("value is null");
		} else {
			return Long.valueOf(value.toString());
		}
	}

	/**
	 * Get the property from propertyMap return a long value for it.
	 * 
	 * @param propertyMap
	 *            map to look for the property in
	 * @param name
	 *            name of the property to look for
	 * @param defaultValue
	 *            value to be returned in case property with name argument is
	 *            not present in the map
	 * @return long value of the property if the property is found and has a
	 *         value in long range. Returns value specified by defalutValue
	 *         argument if the property with name argument doesn't exist.
	 * @throws NumberFormatException
	 *             if the property's value cannot be parsed as a long.
	 */
	public static long getLongProperty(Map propertyMap, String name, long defaultValue) {
		final Object value = propertyMap.get(name);
		return getLongProperty(value, defaultValue);
	}

	/**
	 * Get the property from propertyMap return it's value.
	 * 
	 * @param propertyMap
	 *            map to look for the property in
	 * @param name
	 *            name of the property to look for
	 * @return value of the property if the property is found, null otherwise
	 */
	public static String getStringProperty(Map propertyMap, String name) {
		final Object value = propertyMap.get(name);
		if (value == null)
			return null;
		return String.valueOf(value);
	}

	/**
	 * Get the property from propertyMap return it's value,if it not found
	 * return the default value
	 * 
	 * @param propertyMap
	 *            map to look for the property in
	 * @param name
	 *            name of the property to look for
	 * @return value of the property if the property is found, null otherwise
	 */
	public static String getStringProperty(Map propertyMap, String name, String defaultValue) {
		String value = getStringProperty(propertyMap, name);
		if (value == null)
			return defaultValue;
		else
			return value;
	}

	public static boolean getBooleanProperty(Map propertyMap, String name) {
		final Object value = String.valueOf(propertyMap.get(name));
		if (value == null || value.equals("null"))
			return false;
		return Boolean.parseBoolean(String.valueOf(value));
	}
}