de.intarsys.tools.string.Converter Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of isrt Show documentation
The basic runtime tools and interfaces for intarsys components.
There is a newer version: 4.11
/*
 * Copyright (c) 2007, intarsys consulting GmbH
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * - Redistributions of source code must retain the above copyright notice,
 *   this list of conditions and the following disclaimer.
 *
 * - Redistributions in binary form must reproduce the above copyright notice,
 *   this list of conditions and the following disclaimer in the documentation
 *   and/or other materials provided with the distribution.
 *
 * - Neither the name of intarsys nor the names of its contributors may be used
 *   to endorse or promote products derived from this software without specific
 *   prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
package de.intarsys.tools.string;

import java.io.File;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.StringTokenizer;

import de.intarsys.tools.file.FileTools;

/**
 * Simple string conversion utilities;
 */
public class Converter {

	public static final String ELEMENT_SEPARATOR = ";"; //$NON-NLS-1$

	public static final String KEY_VALUE_SEPARATOR = "="; //$NON-NLS-1$

	public static boolean asBoolean(String booleanString)
			throws ConverterException {
		booleanString = booleanString.toLowerCase().trim();
		if (booleanString.equals("false") || booleanString.equals("f")
				|| booleanString.equals("no") || booleanString.equals("n")
				|| booleanString.equals("0") || booleanString.equals("falsch")
				|| booleanString.equals("nein")) {
			return false;
		}
		if (booleanString.equals("true") || booleanString.equals("t")
				|| booleanString.equals("yes") || booleanString.equals("y")
				|| booleanString.equals("1") || booleanString.equals("wahr")
				|| booleanString.equals("w") || booleanString.equals("ja")
				|| booleanString.equals("j")) {
			return true;
		}
		throw new ConverterException("Can't parse boolean string: "
				+ booleanString + " to a legal value");
	}

	public static boolean asBoolean(String booleanString, boolean defaultValue) {
		if (StringTools.isEmpty(booleanString)) {
			return defaultValue;
		}
		try {
			return asBoolean(booleanString);
		} catch (ConverterException e) {
			return defaultValue;
		}
	}

	public static boolean asBooleanChecked(String booleanString,
			boolean defaultValue) throws ConverterException {
		if (StringTools.isEmpty(booleanString)) {
			return defaultValue;
		}
		return asBoolean(booleanString);
	}

	public static Class asClass(String str) throws ConverterException {
		str = str.trim();
		if (str.equals("")) {
			return null;
		}
		try {
			return Class.forName(str);
		} catch (ClassNotFoundException cnfe) {
			throw new ConverterException(str + " is not a possible Classname!");
		}
	}

	public static double asDouble(String str) throws ConverterException {
		try {
			str = str.trim();
			return Double.parseDouble(str);
		} catch (NumberFormatException e) {
			throw new ConverterException("Can't parse number string: " + str
					+ " to a legal value");
		}
	}

	public static double asDouble(String str, double defaultValue) {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		try {
			return asDouble(str);
		} catch (ConverterException e) {
			return defaultValue;
		}
	}

	public static double asDoubleChecked(String str, double defaultValue)
			throws ConverterException {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		return asDouble(str);
	}

	public static File asFile(String pValue) throws ConverterException {
		String str = pValue.trim();
		str = FileTools.trimPath(str);
		if (str.equals("")) {
			throw new ConverterException("Parameter " + pValue
					+ " is not a valid Filename");
		}
		try {
			return new File(str);
		} catch (NullPointerException e) {
			throw new ConverterException("Can't parse file string: " + str
					+ " to a file");
		}
	}

	public static float asFloat(String str) throws ConverterException {
		try {
			str = str.trim();
			return Float.parseFloat(str);
		} catch (NumberFormatException e) {
			throw new ConverterException("Can't parse number string: " + str
					+ " to a legal value");
		}
	}

	public static float asFloat(String str, float defaultValue) {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		try {
			return asFloat(str);
		} catch (ConverterException e) {
			return defaultValue;
		}
	}

	public static float[] asFloatArray(String value) {
		if (value == null) {
			return null;
		}
		StringTokenizer tk = new StringTokenizer(value, ELEMENT_SEPARATOR,
				false);
		float[] result = new float[tk.countTokens()];
		int i = 0;
		try {
			while (tk.hasMoreTokens()) {
				String token = tk.nextToken();
				result[i] = Float.parseFloat(token.trim());
				i++;
			}
		} catch (NumberFormatException e) {
			return null;
		}
		return result;
	}

	public static float asFloatChecked(String str, float defaultValue)
			throws ConverterException {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		return asFloat(str);
	}

	public static int[] asIntArray(String value) {
		if (value == null) {
			return null;
		}
		StringTokenizer tk = new StringTokenizer(value, ELEMENT_SEPARATOR,
				false);
		int[] result = new int[tk.countTokens()];
		int i = 0;
		try {
			while (tk.hasMoreTokens()) {
				String token = tk.nextToken();
				result[i] = Integer.parseInt(token.trim());
				i++;
			}
		} catch (NumberFormatException e) {
			return null;
		}
		return result;
	}

	public static int asInteger(String str) throws ConverterException {
		try {
			str = str.trim();
			return Integer.parseInt(str);
		} catch (NumberFormatException e) {
			throw new ConverterException("Can't parse integer string: " + str
					+ " to a legal value");
		}
	}

	public static int asInteger(String str, int defaultValue) {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		try {
			return asInteger(str);
		} catch (ConverterException e) {
			return defaultValue;
		}
	}

	public static int asIntegerChecked(String str, int defaultValue)
			throws ConverterException {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		return asInteger(str);
	}

	public static long asLong(String str) throws ConverterException {
		try {
			str = str.trim();
			return Long.parseLong(str);
		} catch (NumberFormatException e) {
			throw new ConverterException("Can't parse integer string: " + str
					+ " to a legal value");
		}
	}

	public static long asLong(String str, long defaultValue) {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		try {
			return asLong(str);
		} catch (ConverterException e) {
			return defaultValue;
		}
	}

	public static long asLongChecked(String str, long defaultValue)
			throws ConverterException {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		}
		return asLong(str);
	}

	public static Map asMap(String string) {
		String key;
		String value;
		String token;
		Map map = new HashMap(5);
		if (string == null) {
			return map;
		}
		StringTokenizer tk = new StringTokenizer(string, ELEMENT_SEPARATOR,
				false);
		while (tk.hasMoreTokens()) {
			token = tk.nextToken();
			int i = token.indexOf(KEY_VALUE_SEPARATOR);
			if (i == -1) {
				key = token;
				value = "";
			} else {
				key = token.substring(0, i);
				if (i >= token.length()) {
					value = "";
				}
				value = token.substring(i + 1);
			}
			map.put(key, value);
		}
		return map;
	}

	public static Map asMapBoolean(String string) {
		Map stringMap = asMap(string);
		Map boolMap = new HashMap(stringMap.size() * 2);
		for (Iterator i = stringMap.entrySet().iterator(); i.hasNext();) {
			Map.Entry entry = (Map.Entry) i.next();
			Boolean value = Boolean.valueOf((String) entry.getValue());
			boolMap.put(entry.getKey(), value);
		}
		return boolMap;
	}

	public static String asString(String str, String defaultValue) {
		if (StringTools.isEmpty(str)) {
			return defaultValue;
		} else {
			return str.trim();
		}
	}

	public static String[] asStringArray(String value) {
		if (value == null) {
			return null;
		}
		return value.split(ELEMENT_SEPARATOR);
	}

	public static Boolean asThreeState(String booleanString)
			throws ConverterException {
		booleanString = booleanString.toLowerCase().trim();
		if (booleanString.equals("false") || booleanString.equals("f")
				|| booleanString.equals("no") || booleanString.equals("n")
				|| booleanString.equals("0") || booleanString.equals("falsch")
				|| booleanString.equals("nein")) {
			return Boolean.FALSE;
		}
		if (booleanString.equals("true") || booleanString.equals("t")
				|| booleanString.equals("yes") || booleanString.equals("y")
				|| booleanString.equals("1") || booleanString.equals("wahr")
				|| booleanString.equals("w") || booleanString.equals("ja")
				|| booleanString.equals("j")) {
			return Boolean.TRUE;
		}
		if (booleanString.equals("undeterminate")
				|| booleanString.equals("undefined")
				|| booleanString.equals("?") || booleanString.equals("u")) {
			return null;
		}
		throw new ConverterException("Can't parse boolean string: "
				+ booleanString + " to a legal value");
	}

	public static Boolean asThreeState(String booleanString,
			Boolean defaultValue) {
		if (StringTools.isEmpty(booleanString)) {
			return defaultValue;
		}
		try {
			return asBoolean(booleanString);
		} catch (ConverterException e) {
			return defaultValue;
		}
	}

	private Converter() {
		super();
	}

}