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/**
* Copyright (c) 2000-2013 Liferay, Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or modify it under
* the terms of the GNU Lesser General Public License as published by the Free
* Software Foundation; either version 2.1 of the License, or (at your option)
* any later version.
*
* This library is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
* details.
*/
package com.liferay.portal.kernel.util;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.util.Arrays;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Provides utility methods related to data validation and format checking.
*
* @author Brian Wing Shun Chan
* @author Alysa Carver
*/
public class Validator {
/**
* Returns true if the booleans are equal.
*
* @param boolean1 the first boolean
* @param boolean2 the second boolean
* @return true if the booleans are equal; false
* otherwise
*/
public static boolean equals(boolean boolean1, boolean boolean2) {
if (boolean1 == boolean2) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the bytes are equal.
*
* @param byte1 the first byte
* @param byte2 the second byte
* @return true if the bytes are equal; false
* otherwise
*/
public static boolean equals(byte byte1, byte byte2) {
if (byte1 == byte2) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the characters are equal.
*
* @param char1 the first character
* @param char2 the second character
* @return true if the characters are equal; false
* otherwise
*/
public static boolean equals(char char1, char char2) {
if (char1 == char2) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the doubles are equal.
*
* @param double1 the first double
* @param double2 the second double
* @return true if the doubles are equal; false
* otherwise
*/
public static boolean equals(double double1, double double2) {
if (Double.compare(double1, double2) == 0) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the floats are equal.
*
* @param float1 the first float
* @param float2 the second float
* @return true if the floats are equal; false
* otherwise
*/
public static boolean equals(float float1, float float2) {
if (Float.compare(float1, float2) == 0) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the integers are equal.
*
* @param int1 the first integer
* @param int2 the second integer
* @return true if the integers are equal; false
* otherwise
*/
public static boolean equals(int int1, int int2) {
if (int1 == int2) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the long integers are equal.
*
* @param long1 the first long integer
* @param long2 the second long integer
* @return true if the long integers are equal;
* false otherwise
*/
public static boolean equals(long long1, long long2) {
if (long1 == long2) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the objects are either equal, the same
* instance, or both null.
*
* @param obj1 the first object
* @param obj2 the second object
* @return true if the objects are either equal, the same
* instance, or both null; false otherwise
*/
public static boolean equals(Object obj1, Object obj2) {
if (obj1 == obj2) {
return true;
}
else if ((obj1 == null) || (obj2 == null)) {
return false;
}
else {
return obj1.equals(obj2);
}
}
/**
* Returns true if the short integers are equal.
*
* @param short1 the first short integer
* @param short2 the second short integer
* @return true if the short integers are equal;
* false otherwise
*/
public static boolean equals(short short1, short short2) {
if (short1 == short2) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the boolean arrays are equal.
*
* @param booleanArray1 the first boolean array
* @param booleanArray2 the second boolean array
* @return true if the booleans arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(
boolean[] booleanArray1, boolean[] booleanArray2) {
Boolean[] booleanObjArray1 = ArrayUtil.toArray(booleanArray1);
Arrays.sort(booleanObjArray1);
Boolean[] booleanObjArray2 = ArrayUtil.toArray(booleanArray2);
Arrays.sort(booleanObjArray2);
return Arrays.equals(booleanObjArray1, booleanObjArray2);
}
/**
* Returns true if the byte arrays are equal.
*
* @param byteArray1 the first byte array
* @param byteArray2 the second byte array
* @return true if the byte arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(byte[] byteArray1, byte[] byteArray2) {
byteArray1 = ArrayUtil.clone(byteArray1);
Arrays.sort(byteArray1);
byteArray2 = ArrayUtil.clone(byteArray2);
Arrays.sort(byteArray2);
return Arrays.equals(byteArray1, byteArray2);
}
/**
* Returns true if the char arrays are equal.
*
* @param charArray1 the first char array
* @param charArray2 the second char array
* @return true if the char arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(char[] charArray1, char[] charArray2) {
charArray1 = ArrayUtil.clone(charArray1);
Arrays.sort(charArray1);
charArray2 = ArrayUtil.clone(charArray2);
Arrays.sort(charArray2);
return Arrays.equals(charArray1, charArray2);
}
/**
* Returns true if the double arrays are equal.
*
* @param doubleArray1 the first double array
* @param doubleArray2 the second double array
* @return true if the double arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(
double[] doubleArray1, double[] doubleArray2) {
doubleArray1 = ArrayUtil.clone(doubleArray1);
Arrays.sort(doubleArray1);
doubleArray2 = ArrayUtil.clone(doubleArray2);
Arrays.sort(doubleArray2);
return Arrays.equals(doubleArray1, doubleArray2);
}
/**
* Returns true if the float arrays are equal.
*
* @param floatArray1 the first float array
* @param floatArray2 the second char array
* @return true if the float arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(
float[] floatArray1, float[] floatArray2) {
floatArray1 = ArrayUtil.clone(floatArray1);
Arrays.sort(floatArray1);
floatArray2 = ArrayUtil.clone(floatArray2);
Arrays.sort(floatArray2);
return Arrays.equals(floatArray1, floatArray2);
}
/**
* Returns true if the int arrays are equal.
*
* @param intArray1 the first int array
* @param intArray2 the second int array
* @return true if the int arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(int[] intArray1, int[] intArray2) {
intArray1 = ArrayUtil.clone(intArray1);
Arrays.sort(intArray1);
intArray2 = ArrayUtil.clone(intArray2);
Arrays.sort(intArray2);
return Arrays.equals(intArray1, intArray2);
}
/**
* Returns true if the long arrays are equal.
*
* @param longArray1 the first long array
* @param longArray2 the second long array
* @return true if the long arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(long[] longArray1, long[] longArray2) {
longArray1 = ArrayUtil.clone(longArray1);
Arrays.sort(longArray1);
longArray2 = ArrayUtil.clone(longArray2);
Arrays.sort(longArray2);
return Arrays.equals(longArray1, longArray2);
}
/**
* Returns true if the object arrays are equal.
*
* @param objArray1 the first object array
* @param objArray2 the second object array
* @return true if the object arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(Object[] objArray1, Object[] objArray2) {
objArray1 = ArrayUtil.clone(objArray1);
Arrays.sort(objArray1);
objArray2 = ArrayUtil.clone(objArray2);
Arrays.sort(objArray2);
return Arrays.equals(objArray1, objArray2);
}
/**
* Returns true if the short arrays are equal.
*
* @param shortArray1 the first short array
* @param shortArray2 the second short array
* @return true if the short arrays are equal; false
* otherwise
*/
public static boolean equalsSorted(
short[] shortArray1, short[] shortArray2) {
shortArray1 = ArrayUtil.clone(shortArray1);
Arrays.sort(shortArray1);
shortArray2 = ArrayUtil.clone(shortArray2);
Arrays.sort(shortArray2);
return Arrays.equals(shortArray1, shortArray2);
}
/**
* Returns true if the string is an email address. The only
* requirements are that the string consist of two parts separated by an @
* symbol, and that it contain no whitespace.
*
* @param address the string to check
* @return true if the string is an email address;
* false otherwise
*/
public static boolean isAddress(String address) {
if (isNull(address)) {
return false;
}
String[] tokens = address.split(StringPool.AT);
if (tokens.length != 2) {
return false;
}
for (String token : tokens) {
for (char c : token.toCharArray()) {
if (Character.isWhitespace(c)) {
return false;
}
}
}
return true;
}
/**
* Returns true if the string is an alphanumeric name, meaning
* it contains nothing but English letters, numbers, and spaces.
*
* @param name the string to check
* @return true if the string is an Alphanumeric name;
* false otherwise
*/
public static boolean isAlphanumericName(String name) {
if (isNull(name)) {
return false;
}
for (char c : name.trim().toCharArray()) {
if (!isChar(c) && !isDigit(c) && !Character.isWhitespace(c)) {
return false;
}
}
return true;
}
/**
* Returns true if the character is in the ASCII character set.
* This includes characters with integer values between 32 and 126
* (inclusive).
*
* @param c the character to check
* @return true if the character is in the ASCII character set;
* false otherwise
*/
public static boolean isAscii(char c) {
int i = c;
if ((i >= 32) && (i <= 126)) {
return true;
}
else {
return false;
}
}
public static boolean isBlank(String s) {
if (s == null) {
return true;
}
if (s.length() == 0) {
return true;
}
return false;
}
/**
* Returns true if the character is an upper or lower case
* English letter.
*
* @param c the character to check
* @return true if the character is an upper or lower case
* English letter; false otherwise
*/
public static boolean isChar(char c) {
int x = c;
if (((x >= _CHAR_LOWER_CASE_BEGIN) && (x <= _CHAR_LOWER_CASE_END)) ||
((x >= _CHAR_UPPER_CASE_BEGIN) && (x <= _CHAR_UPPER_CASE_END))) {
return true;
}
return false;
}
/**
* Returns true if string consists only of upper and lower case
* English letters.
*
* @param s the string to check
* @return true if the string consists only of upper and lower
* case English letters
*/
public static boolean isChar(String s) {
if (isNull(s)) {
return false;
}
for (char c : s.toCharArray()) {
if (!isChar(c)) {
return false;
}
}
return true;
}
/**
* Returns true if the date is valid in the Gregorian calendar.
*
* @param month the month to check
* @param day the day to check
* @param year the year to check
* @return true if the date is valid in the Gregorian calendar;
* false otherwise
*/
public static boolean isDate(int month, int day, int year) {
return isGregorianDate(month, day, year);
}
/**
* Returns true if the character is a digit between 0 and 9
* (inclusive).
*
* @param c the character to check
* @return true if the character is a digit between 0 and 9
* (inclusive); false otherwise
*/
public static boolean isDigit(char c) {
int x = c;
if ((x >= _DIGIT_BEGIN) && (x <= _DIGIT_END)) {
return true;
}
return false;
}
/**
* Returns true if the string consists of only digits between 0
* and 9 (inclusive).
*
* @param s the string to check
* @return true if the string consists of only digits between 0
* and 9 (inclusive); false otherwise
*/
public static boolean isDigit(String s) {
if (isNull(s)) {
return false;
}
for (char c : s.toCharArray()) {
if (!isDigit(c)) {
return false;
}
}
return true;
}
/**
* Returns true if the string is a valid domain name. See
* RFC-1034 (section 3), RFC-1123 (section 2.1), and RFC-952 (section B.
* Lexical grammar).
*
* @param domainName the string to check
* @return true if the string is a valid domain name;
* false otherwise
*/
public static boolean isDomain(String domainName) {
// See RFC-1034 (section 3), RFC-1123 (section 2.1), and RFC-952
// (section B. Lexical grammar)
if (isNull(domainName)) {
return false;
}
if (domainName.length() > 255) {
return false;
}
if (domainName.startsWith(StringPool.PERIOD)) {
return false;
}
String[] domainNameArray = StringUtil.split(
domainName, CharPool.PERIOD);
for (String domainNamePart : domainNameArray) {
char[] domainNamePartCharArray = domainNamePart.toCharArray();
for (int i = 0; i < domainNamePartCharArray.length; i++) {
char c = domainNamePartCharArray[i];
if ((i == 0) && (c == CharPool.DASH)) {
return false;
}
if ((i == (domainNamePartCharArray.length - 1)) &&
(c == CharPool.DASH)) {
return false;
}
if (!Character.isLetterOrDigit(c) && (c != CharPool.DASH)) {
return false;
}
}
}
return true;
}
/**
* Returns true if the string is a valid email address.
*
* @param emailAddress the string to check
* @return true if the string is a valid email address;
* false otherwise
*/
public static boolean isEmailAddress(String emailAddress) {
Matcher matcher = _emailAddressPattern.matcher(emailAddress);
return matcher.matches();
}
/**
* Returns true if the character is a special character in an
* email address.
*
* @param c the character to check
* @return true if the character is a special character in an
* email address; false otherwise
*/
public static boolean isEmailAddressSpecialChar(char c) {
// LEP-1445
for (char specialChar : _EMAIL_ADDRESS_SPECIAL_CHAR) {
if (c == specialChar) {
return true;
}
}
return false;
}
/**
* Returns true if the file extension is valid.
*
* @param fileExtension string to check
* @return true if the extension is valid; false
* otherwise
*/
public static boolean isFileExtension(String fileExtension) {
if (isNull(fileExtension) ||
fileExtension.contains(StringPool.BACK_SLASH) ||
fileExtension.contains(StringPool.NULL_CHAR) ||
fileExtension.contains(StringPool.SLASH)) {
return false;
}
return true;
}
public static boolean isFileName(String name) {
if (isNull(name) || name.equals(StringPool.PERIOD) ||
name.equals(StringPool.DOUBLE_PERIOD) ||
name.contains(StringPool.BACK_SLASH) ||
name.contains(StringPool.NULL_CHAR) ||
name.contains(StringPool.SLASH)) {
return false;
}
return true;
}
public static boolean isFilePath(String path, boolean isParentDirAllowed) {
if (isNull(path)) {
return false;
}
if (path.contains(StringPool.NULL_CHAR)) {
return false;
}
if (isParentDirAllowed) {
return true;
}
if (path.equals(StringPool.DOUBLE_PERIOD)) {
return false;
}
String normalizedPath = path.replace(
CharPool.BACK_SLASH, CharPool.SLASH);
if (normalizedPath.startsWith(
StringPool.DOUBLE_PERIOD.concat(StringPool.SLASH))) {
return false;
}
if (normalizedPath.endsWith(
StringPool.SLASH.concat(StringPool.DOUBLE_PERIOD))) {
return false;
}
if (normalizedPath.contains(
StringPool.SLASH.concat(
StringPool.DOUBLE_PERIOD).concat(StringPool.SLASH))) {
return false;
}
return true;
}
/**
* Returns true if the date is valid in the Gregorian calendar.
*
* @param month the month (0-based, meaning 0 for January)
* @param day the day of the month
* @param year the year
* @return true if the date is valid; false
* otherwise
*/
public static boolean isGregorianDate(int month, int day, int year) {
if ((month < 0) || (month > 11)) {
return false;
}
int[] months = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if (month == 1) {
int febMax = 28;
if (((year % 4) == 0) && ((year % 100) != 0) ||
((year % 400) == 0)) {
febMax = 29;
}
if ((day < 1) || (day > febMax)) {
return false;
}
}
else if ((day < 1) || (day > months[month])) {
return false;
}
return true;
}
/**
* Returns true if the string is a hexidecimal number. At
* present the only requirement is that the string is not null;
* it does not actually check the format of the string.
*
* @param s the string to check
* @return true if the string is a hexidecimal number;
* false otherwise
* @see #isNull(String)
*/
public static boolean isHex(String s) {
if (isNull(s)) {
return false;
}
return true;
}
/**
* Returns true if the string is a valid host name.
*
* @param name the string to check
* @return true if the string is a valid host name;
* false otherwise
*/
public static boolean isHostName(String name) {
if (isNull(name)) {
return false;
}
char[] nameCharArray = name.toCharArray();
if ((nameCharArray[0] == CharPool.DASH) ||
(nameCharArray[0] == CharPool.PERIOD) ||
(nameCharArray[nameCharArray.length - 1] == CharPool.DASH)) {
return false;
}
for (char c : nameCharArray) {
if (!isChar(c) && !isDigit(c) && (c != CharPool.CLOSE_BRACKET) &&
(c != CharPool.COLON) && (c != CharPool.DASH) &&
(c != CharPool.OPEN_BRACKET) && (c != CharPool.PERIOD)) {
return false;
}
}
return true;
}
/**
* Returns true if the string is an HTML document. The only
* requirement is that it contain the opening and closing html tags.
*
* @param s the string to check
* @return true if the string is an HTML document;
* false otherwise
*/
public static boolean isHTML(String s) {
if (isNull(s)) {
return false;
}
if ((s.contains("") || s.contains("")) &&
(s.contains("") || s.contains(""))) {
return true;
}
return false;
}
/**
* Returns true if the string is a valid IPv4 or IPv6 IP
* address.
*
* @param ipAddress the string to check
* @return true if the string is a valid IPv4 or IPv6 IP
* address; false otherwise
*/
public static boolean isIPAddress(String ipAddress) {
if (isIPv4Address(ipAddress) || isIPv6Address(ipAddress)) {
return true;
}
return false;
}
/**
* Returns true if the string is a valid IPv4 IP address.
*
* @param ipAddress the string to check
* @return true if the string is a valid IPv4 IP address;
* false otherwise
*/
public static boolean isIPv4Address(String ipAddress) {
Matcher matcher = _ipv4AddressPattern.matcher(ipAddress);
return matcher.matches();
}
/**
* Returns true if the string is a valid IPv6 IP address.
*
* @param ipAddress the string to check
* @return true if the string is a valid IPv6 IP address;
* false otherwise
*/
public static boolean isIPv6Address(String ipAddress) {
if (isNull(ipAddress)) {
return false;
}
if (StringUtil.startsWith(ipAddress, CharPool.OPEN_BRACKET) &&
StringUtil.endsWith(ipAddress, CharPool.CLOSE_BRACKET)) {
ipAddress = ipAddress.substring(1, ipAddress.length() - 1);
}
Matcher matcher = _ipv6AddressPattern.matcher(ipAddress);
return matcher.matches();
}
/**
* Returns true if the date is valid in the Julian calendar.
*
* @param month the month (0-based, meaning 0 for January)
* @param day the day of the month
* @param year the year
* @return true if the date is valid in the Julian calendar;
* false otherwise
*/
public static boolean isJulianDate(int month, int day, int year) {
if ((month < 0) || (month > 11)) {
return false;
}
int[] months = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
if (month == 1) {
int febMax = 28;
if ((year % 4) == 0) {
febMax = 29;
}
if ((day < 1) || (day > febMax)) {
return false;
}
}
else if ((day < 1) || (day > months[month])) {
return false;
}
return true;
}
/**
* Returns true if the string contains a valid number according
* to the Luhn algorithm, commonly used to validate credit card numbers.
*
* @param number the string to check
* @return true if the string contains a valid number according
* to the Luhn algorithm; false otherwise
*/
public static boolean isLUHN(String number) {
if (number == null) {
return false;
}
number = StringUtil.reverse(number);
int total = 0;
for (int i = 0; i < number.length(); i++) {
int x = 0;
if (((i + 1) % 2) == 0) {
x = GetterUtil.getInteger(number.substring(i, i + 1)) * 2;
if (x >= 10) {
String s = String.valueOf(x);
x =
GetterUtil.getInteger(s.substring(0, 1)) +
GetterUtil.getInteger(s.substring(1, 2));
}
}
else {
x = GetterUtil.getInteger(number.substring(i, i + 1));
}
total = total + x;
}
if ((total % 10) == 0) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the string is a name, meaning it contains
* nothing but English letters and spaces.
*
* @param name the string to check
* @return true if the string is a name; false
* otherwise
*/
public static boolean isName(String name) {
if (isNull(name)) {
return false;
}
for (char c : name.trim().toCharArray()) {
if (!isChar(c) && !Character.isWhitespace(c)) {
return false;
}
}
return true;
}
/**
* Returns true if the long number object is not
* null, meaning it is neither a null reference or
* zero.
*
* @param l the long number object to check
* @return true if the long number object is not
* null; false otherwise
*/
public static boolean isNotNull(Long l) {
return !isNull(l);
}
/**
* Returns true if the object is not null, using
* the rules from {@link #isNotNull(Long)} or {@link #isNotNull(String)} if
* the object is one of these types.
*
* @param obj the object to check
* @return true if the object is not null;
* false otherwise
*/
public static boolean isNotNull(Object obj) {
return !isNull(obj);
}
/**
* @deprecated As of 6.2.0, replaced by {@link ArrayUtil#isNotEmpty(
* Object[])}
*/
public static boolean isNotNull(Object[] array) {
return ArrayUtil.isNotEmpty(array);
}
/**
* Returns true if the string is not null, meaning
* it is not a null reference, nothing but spaces, or the
* string "null".
*
* @param s the string to check
* @return true if the string is not null;
* false otherwise
*/
public static boolean isNotNull(String s) {
return !isNull(s);
}
/**
* Returns true if the long number object is null,
* meaning it is either a null reference or zero.
*
* @param l the long number object to check
* @return true if the long number object is null;
* false otherwise
*/
public static boolean isNull(Long l) {
if ((l == null) || (l.longValue() == 0)) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the object is null, using the
* rules from {@link #isNull(Long)} or {@link #isNull(String)} if the object
* is one of these types.
*
* @param obj the object to check
* @return true if the object is null;
* false otherwise
*/
public static boolean isNull(Object obj) {
if (obj instanceof Long) {
return isNull((Long)obj);
}
else if (obj instanceof String) {
return isNull((String)obj);
}
else if (obj == null) {
return true;
}
else {
return false;
}
}
/**
* @deprecated As of 6.2.0, replaced by {@link ArrayUtil#isEmpty(Object[])}
*/
public static boolean isNull(Object[] array) {
return ArrayUtil.isEmpty(array);
}
/**
* Returns true if the string is null, meaning it
* is a null reference, nothing but spaces, or the string
* "null".
*
* @param s the string to check
* @return true if the string is null;
* false otherwise
*/
public static boolean isNull(String s) {
if (s == null) {
return true;
}
int counter = 0;
for (int i = 0; i < s.length(); i++) {
char c = s.charAt(i);
if (c == CharPool.SPACE) {
continue;
}
else if (counter > 3) {
return false;
}
if (counter == 0) {
if (c != CharPool.LOWER_CASE_N) {
return false;
}
}
else if (counter == 1) {
if (c != CharPool.LOWER_CASE_U) {
return false;
}
}
else if ((counter == 2) || (counter == 3)) {
if (c != CharPool.LOWER_CASE_L) {
return false;
}
}
counter++;
}
if ((counter == 0) || (counter == 4)) {
return true;
}
return false;
}
/**
* Returns true if the string is a decimal integer number,
* meaning it contains nothing but decimal digits.
*
* @param number the string to check
* @return true if the string is a decimal integer number;
* false otherwise
*/
public static boolean isNumber(String number) {
if (isNull(number)) {
return false;
}
for (char c : number.toCharArray()) {
if (!isDigit(c)) {
return false;
}
}
return true;
}
/**
* Returns true if the string is a valid password, meaning it
* is at least four characters long and contains only letters and decimal
* digits.
*
* @param password the string to check
* @return true if the string is a valid password;
* false otherwise
*/
public static boolean isPassword(String password) {
if (isNull(password)) {
return false;
}
if (password.length() < 4) {
return false;
}
for (char c : password.toCharArray()) {
if (!isChar(c) && !isDigit(c)) {
return false;
}
}
return true;
}
/**
* Returns true if the string is a valid phone number. The only
* requirement is that there are decimal digits in the string; length and
* format are not checked.
*
* @param phoneNumber the string to check
* @return true if the string is a valid phone number;
* false otherwise
*/
public static boolean isPhoneNumber(String phoneNumber) {
return isNumber(StringUtil.extractDigits(phoneNumber));
}
public static boolean isUri(String uri) {
if (isNotNull(uri)) {
try {
new URI(uri);
return true;
}
catch (URISyntaxException urise) {
}
}
return false;
}
/**
* Returns true if the string is a valid URL based on the rules
* in {@link java.net.URL}.
*
* @param url the string to check
* @return true if the string is a valid URL;
* false otherwise
*/
public static boolean isUrl(String url) {
if (isNotNull(url)) {
if (url.indexOf(CharPool.COLON) == -1) {
return false;
}
try {
new URL(url);
return true;
}
catch (MalformedURLException murle) {
}
}
return false;
}
/**
* Returns true if the string is a valid variable name in Java.
*
* @param variableName the string to check
* @return true if the string is a valid variable name in Java;
* false otherwise
*/
public static boolean isVariableName(String variableName) {
if (isNull(variableName)) {
return false;
}
Matcher matcher = _variableNamePattern.matcher(variableName);
if (matcher.matches()) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the string is a valid variable term, meaning
* it begins with "[$" and ends with "$]".
*
* @param s the string to check
* @return true if the string is a valid variable term;
* false otherwise
*/
public static boolean isVariableTerm(String s) {
if (s.startsWith(_VARIABLE_TERM_BEGIN) &&
s.endsWith(_VARIABLE_TERM_END)) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the character is whitespace, meaning it is
* either the null character '0' or whitespace according to
* {@link java.lang.Character#isWhitespace(char)}.
*
* @param c the character to check
* @return true if the character is whitespace;
* false otherwise
*/
public static boolean isWhitespace(char c) {
int i = c;
if ((i == 0) || Character.isWhitespace(c)) {
return true;
}
else {
return false;
}
}
/**
* Returns true if the string is an XML document. The only
* requirement is that it contain either the xml start tag "".
*
* @param s the string to check
* @return true if the string is an XML document;
* false otherwise
*/
public static boolean isXml(String s) {
if (s.startsWith(_XML_BEGIN) || s.startsWith(_XML_EMPTY)) {
return true;
}
else {
return false;
}
}
private static final int _CHAR_LOWER_CASE_BEGIN = 97;
private static final int _CHAR_LOWER_CASE_END = 122;
private static final int _CHAR_UPPER_CASE_BEGIN = 65;
private static final int _CHAR_UPPER_CASE_END = 90;
private static final int _DIGIT_BEGIN = 48;
private static final int _DIGIT_END = 57;
private static final char[] _EMAIL_ADDRESS_SPECIAL_CHAR = new char[] {
'.', '!', '#', '$', '%', '&', '\'', '*', '+', '-', '/', '=', '?', '^',
'_', '`', '{', '|', '}', '~'
};
private static final String _VARIABLE_TERM_BEGIN = "[$";
private static final String _VARIABLE_TERM_END = "$]";
private static final String _XML_BEGIN = "";
private static Pattern _emailAddressPattern = Pattern.compile(
"[\\w!#$%&'*+/=?^_`{|}~-]+(?:\\.[\\w!#$%&'*+/=?^_`{|}~-]+)*@" +
"(?:[\\w](?:[\\w-]*[\\w])?\\.)+[\\w](?:[\\w-]*[\\w])?");
private static Pattern _ipv4AddressPattern = Pattern.compile(
"^" +
"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\." +
"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\." +
"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\." +
"(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)" +
"$");
private static Pattern _ipv6AddressPattern = Pattern.compile(
"^" +
"\\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|" +
"(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|" +
"((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)" +
"(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|" +
"(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:" +
"((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)" +
"(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3})|:))|" +
"(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|" +
"((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)" +
"(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|" +
"(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|" +
"((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)" +
"(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|" +
"(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|" +
"((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)" +
"(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|" +
"(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|" +
"((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)" +
"(\\.(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:))|" +
"(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:" +
"((25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)(\\." +
"(25[0-5]|2[0-4]\\d|1\\d\\d|[1-9]?\\d)){3}))|:)))(%.+)?\\s*" +
"$");
private static Pattern _variableNamePattern = Pattern.compile(
"[_a-zA-Z]+[_a-zA-Z0-9]*");
}
