com.cedarsoftware.util.convert.StringConversions Maven / Gradle / Ivy
package com.cedarsoftware.util.convert;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.RoundingMode;
import java.net.URI;
import java.net.URL;
import java.nio.ByteBuffer;
import java.nio.CharBuffer;
import java.sql.Timestamp;
import java.time.Duration;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.LocalTime;
import java.time.MonthDay;
import java.time.OffsetDateTime;
import java.time.OffsetTime;
import java.time.Period;
import java.time.Year;
import java.time.YearMonth;
import java.time.ZoneId;
import java.time.ZoneOffset;
import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.time.format.DateTimeParseException;
import java.util.Calendar;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.UUID;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.atomic.AtomicLong;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import com.cedarsoftware.util.ClassUtilities;
import com.cedarsoftware.util.DateUtilities;
import com.cedarsoftware.util.StringUtilities;
import static com.cedarsoftware.util.ArrayUtilities.EMPTY_BYTE_ARRAY;
import static com.cedarsoftware.util.ArrayUtilities.EMPTY_CHAR_ARRAY;
/**
* @author John DeRegnaucourt ([email protected])
*
* Copyright (c) Cedar Software LLC
*
* 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
*
* License
*
* 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.
*/
final class StringConversions {
private static final BigDecimal bigDecimalMinByte = BigDecimal.valueOf(Byte.MIN_VALUE);
private static final BigDecimal bigDecimalMaxByte = BigDecimal.valueOf(Byte.MAX_VALUE);
private static final BigDecimal bigDecimalMinShort = BigDecimal.valueOf(Short.MIN_VALUE);
private static final BigDecimal bigDecimalMaxShort = BigDecimal.valueOf(Short.MAX_VALUE);
private static final BigDecimal bigDecimalMinInteger = BigDecimal.valueOf(Integer.MIN_VALUE);
private static final BigDecimal bigDecimalMaxInteger = BigDecimal.valueOf(Integer.MAX_VALUE);
private static final BigDecimal bigDecimalMaxLong = BigDecimal.valueOf(Long.MAX_VALUE);
private static final BigDecimal bigDecimalMinLong = BigDecimal.valueOf(Long.MIN_VALUE);
private static final Pattern MM_DD = Pattern.compile("^(\\d{1,2}).(\\d{1,2})$");
private static final Pattern allDigits = Pattern.compile("^\\d+$");
private StringConversions() {}
static String asString(Object from) {
return from == null ? null : from.toString();
}
static Byte toByte(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return (byte)0;
}
try {
return Byte.valueOf(str);
} catch (NumberFormatException e) {
Long value = toLong(str, bigDecimalMinByte, bigDecimalMaxByte);
if (value == null) {
throw new IllegalArgumentException("Value '" + str + "' not parseable as a byte value or outside " + Byte.MIN_VALUE + " to " + Byte.MAX_VALUE, e);
}
return value.byteValue();
}
}
static Short toShort(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return (short)0;
}
try {
return Short.valueOf(str);
} catch (Exception e) {
Long value = toLong(str, bigDecimalMinShort, bigDecimalMaxShort);
if (value == null) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as a short value or outside " + Short.MIN_VALUE + " to " + Short.MAX_VALUE, e);
}
return value.shortValue();
}
}
static Integer toInt(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return 0;
}
try {
return Integer.valueOf(str);
} catch (NumberFormatException e) {
Long value = toLong(str, bigDecimalMinInteger, bigDecimalMaxInteger);
if (value == null) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as an int value or outside " + Integer.MIN_VALUE + " to " + Integer.MAX_VALUE, e);
}
return value.intValue();
}
}
static Long toLong(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return 0L;
}
try {
return Long.valueOf(str);
} catch (Exception e) {
Long value = toLong(str, bigDecimalMinLong, bigDecimalMaxLong);
if (value == null) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as a long value or outside " + Long.MIN_VALUE + " to " + Long.MAX_VALUE, e);
}
return value;
}
}
private static Long toLong(String s, BigDecimal low, BigDecimal high) {
try {
BigDecimal big = new BigDecimal(s);
big = big.setScale(0, RoundingMode.DOWN);
if (big.compareTo(low) == -1 || big.compareTo(high) == 1) {
return null;
}
return big.longValue();
} catch (Exception e) {
return null;
}
}
static Float toFloat(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return 0f;
}
try {
return Float.valueOf(str);
} catch (Exception e) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as a float value", e);
}
}
static Double toDouble(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return 0.0;
}
try {
return Double.valueOf(str);
} catch (Exception e) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as a double value", e);
}
}
static AtomicBoolean toAtomicBoolean(Object from, Converter converter) {
return new AtomicBoolean(toBoolean(from, converter));
}
static AtomicInteger toAtomicInteger(Object from, Converter converter) {
return new AtomicInteger(toInt(from, converter));
}
static AtomicLong toAtomicLong(Object from, Converter converter) {
return new AtomicLong(toLong(from, converter));
}
static Boolean toBoolean(Object from, Converter converter) {
String str = (String) from;
// faster equals check "true" and "false"
if ("true".equals(str)) {
return true;
} else if ("false".equals(str)) {
return false;
}
return "true".equalsIgnoreCase(str) || "t".equalsIgnoreCase(str) || "1".equals(str) || "y".equalsIgnoreCase(str) || "\"true\"".equalsIgnoreCase(str);
}
static char toCharacter(Object from, Converter converter) {
String str = (String)from;
if (str.isEmpty()) {
return (char)0;
}
if (str.length() == 1) {
return str.charAt(0);
}
Matcher matcher = allDigits.matcher(str);
boolean isAllDigits = matcher.matches();
if (isAllDigits) {
try { // Treat as a String number, like "65" = 'A'
return (char) Integer.parseInt(str.trim());
} catch (Exception e) {
throw new IllegalArgumentException("Unable to parse '" + from + "' as a Character.", e);
}
}
char result = parseUnicodeEscape(str);
return result;
}
private static char parseUnicodeEscape(String unicodeStr) throws IllegalArgumentException {
if (!unicodeStr.startsWith("\\u") || unicodeStr.length() != 6) {
throw new IllegalArgumentException("Unable to parse'" + unicodeStr + "' as a char/Character. Invalid Unicode escape sequence." + unicodeStr);
}
int codePoint = Integer.parseInt(unicodeStr.substring(2), 16);
return (char) codePoint;
}
static BigInteger toBigInteger(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return BigInteger.ZERO;
}
try {
BigDecimal bigDec = new BigDecimal(str);
return bigDec.toBigInteger();
} catch (Exception e) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as a BigInteger value.", e);
}
}
static BigDecimal toBigDecimal(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return BigDecimal.ZERO;
}
try {
return new BigDecimal(str);
} catch (NumberFormatException e) {
throw new IllegalArgumentException("Value '" + from + "' not parseable as a BigDecimal value.", e);
}
}
static URL toURL(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return null;
}
try {
URI uri = URI.create(str);
return uri.toURL();
} catch (Exception e) {
throw new IllegalArgumentException("Cannot convert String '" + str + "' to URL", e);
}
}
static URI toURI(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return null;
}
return URI.create((String) from);
}
static String enumToString(Object from, Converter converter) {
return ((Enum) from).name();
}
static UUID toUUID(Object from, Converter converter) {
String s = (String) from;
try {
return UUID.fromString(s);
} catch (Exception e) {
throw new IllegalArgumentException("Unable to convert '" + s + "' to UUID", e);
}
}
static Duration toDuration(Object from, Converter converter) {
try {
return Duration.parse((String) from);
} catch (Exception e) {
throw new IllegalArgumentException("Unable to parse '" + from + "' as a Duration.", e);
}
}
static Class toClass(Object from, Converter converter) {
String str = ((String) from).trim();
Class clazz = ClassUtilities.forName(str, converter.getOptions().getClassLoader());
if (clazz != null) {
return clazz;
}
throw new IllegalArgumentException("Cannot convert String '" + str + "' to class. Class not found.");
}
static MonthDay toMonthDay(Object from, Converter converter) {
String monthDay = (String) from;
try {
return MonthDay.parse(monthDay);
}
catch (DateTimeParseException e) {
Matcher matcher = MM_DD.matcher(monthDay);
if (matcher.find()) {
String mm = matcher.group(1);
String dd = matcher.group(2);
return MonthDay.of(Integer.parseInt(mm), Integer.parseInt(dd));
}
else {
try {
ZonedDateTime zdt = DateUtilities.parseDate(monthDay, converter.getOptions().getZoneId(), true);
if (zdt == null) {
return null;
}
return MonthDay.of(zdt.getMonthValue(), zdt.getDayOfMonth());
} catch (Exception ex) {
throw new IllegalArgumentException("Unable to extract Month-Day from string: " + monthDay, ex);
}
}
}
}
static YearMonth toYearMonth(Object from, Converter converter) {
String yearMonth = (String) from;
try {
return YearMonth.parse(yearMonth);
} catch (DateTimeParseException e) {
try {
ZonedDateTime zdt = DateUtilities.parseDate(yearMonth, converter.getOptions().getZoneId(), true);
if (zdt == null) {
return null;
}
return YearMonth.of(zdt.getYear(), zdt.getMonthValue());
} catch (Exception ex) {
throw new IllegalArgumentException("Unable to extract Year-Month from string: " + yearMonth, ex);
}
}
}
static Period toPeriod(Object from, Converter converter) {
String period = (String) from;
try {
return Period.parse(period);
}
catch (Exception e) {
throw new IllegalArgumentException("Unable to parse '" + period + "' as a Period.", e);
}
}
static Date toDate(Object from, Converter converter) {
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
return Date.from(zdt.toInstant());
}
static java.sql.Date toSqlDate(Object from, Converter converter) {
Instant instant = toInstant(from, converter);
return instant == null ? null : new java.sql.Date(instant.toEpochMilli());
}
static Timestamp toTimestamp(Object from, Converter converter) {
Instant instant = toInstant(from, converter);
return instant == null ? null : new Timestamp(instant.toEpochMilli());
}
static TimeZone toTimeZone(Object from, Converter converter) {
String str = StringUtilities.trimToNull((String)from);
if (str == null) {
return null;
}
return TimeZone.getTimeZone(str);
}
static Calendar toCalendar(Object from, Converter converter) {
String calStr = (String) from;
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
ZonedDateTime zdtUser = zdt.withZoneSameInstant(converter.getOptions().getZoneId());
Calendar cal = Calendar.getInstance(TimeZone.getTimeZone(zdtUser.getZone()));
cal.setTimeInMillis(zdtUser.toInstant().toEpochMilli());
return cal;
}
static LocalDate toLocalDate(Object from, Converter converter) {
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
return zdt.toLocalDate();
}
static LocalDateTime toLocalDateTime(Object from, Converter converter) {
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
return zdt.toLocalDateTime();
}
static LocalTime toLocalTime(Object from, Converter converter) {
String str = (String) from;
try {
return LocalTime.parse(str);
} catch (Exception e) {
ZonedDateTime zdt = toZonedDateTime(str, converter);
if (zdt == null) {
return null;
}
return zdt.toLocalTime();
}
}
static Locale toLocale(Object from, Converter converter) {
String str = (String)from;
if (StringUtilities.isEmpty(str)) {
return null;
}
return Locale.forLanguageTag(str);
}
static ZonedDateTime toZonedDateTime(Object from, Converter converter) {
return DateUtilities.parseDate((String)from, converter.getOptions().getZoneId(), true);
}
static ZoneId toZoneId(Object from, Converter converter) {
String str = (String) from;
if (StringUtilities.isEmpty(str)) {
return null;
}
try {
return ZoneId.of(str);
} catch (Exception e) {
TimeZone tz = TimeZone.getTimeZone(str);
if ("GMT".equals(tz.getID())) {
throw new IllegalArgumentException("Unknown time-zone ID: '" + str + "'", e);
} else {
return tz.toZoneId();
}
}
}
static ZoneOffset toZoneOffset(Object from, Converter converter) {
String str = (String)from;
if (StringUtilities.isEmpty(str)) {
return null;
}
try {
return ZoneOffset.of(str);
} catch (Exception e) {
throw new IllegalArgumentException("Unknown time-zone offset: '" + str + "'");
}
}
static OffsetDateTime toOffsetDateTime(Object from, Converter converter) {
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
return zdt.toOffsetDateTime();
}
static OffsetTime toOffsetTime(Object from, Converter converter) {
String str = (String) from;
try {
return OffsetTime.parse(str, DateTimeFormatter.ISO_OFFSET_TIME);
} catch (Exception e) {
try {
OffsetDateTime dateTime = toOffsetDateTime(from, converter);
if (dateTime == null) {
return null;
}
return dateTime.toOffsetTime();
} catch (Exception ex) {
throw new IllegalArgumentException("Unable to parse '" + str + "' as an OffsetTime", e);
}
}
}
static Instant toInstant(Object from, Converter converter) {
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
return zdt.toInstant();
}
static char[] toCharArray(Object from, Converter converter) {
String str = from.toString();
if (StringUtilities.isEmpty(str)) {
return EMPTY_CHAR_ARRAY;
}
return str.toCharArray();
}
static Character[] toCharacterArray(Object from, Converter converter) {
CharSequence s = (CharSequence) from;
int len = s.length();
Character[] ca = new Character[len];
for (int i=0; i < len; i++) {
ca[i] = s.charAt(i);
}
return ca;
}
static CharBuffer toCharBuffer(Object from, Converter converter) {
return CharBuffer.wrap(asString(from));
}
static byte[] toByteArray(Object from, Converter converter) {
String s = asString(from);
if (s == null || s.isEmpty()) {
return EMPTY_BYTE_ARRAY;
}
return s.getBytes(converter.getOptions().getCharset());
}
static ByteBuffer toByteBuffer(Object from, Converter converter) {
return ByteBuffer.wrap(toByteArray(from, converter));
}
static String toString(Object from, Converter converter) {
return from == null ? null : from.toString();
}
static StringBuffer toStringBuffer(Object from, Converter converter) {
return from == null ? null : new StringBuffer(from.toString());
}
static StringBuilder toStringBuilder(Object from, Converter converter) {
return from == null ? null : new StringBuilder(from.toString());
}
static Year toYear(Object from, Converter converter) {
String str = (String) from;
try {
str = StringUtilities.trimToNull(str);
return Year.of(Integer.parseInt(str));
} catch (Exception e) {
try {
ZonedDateTime zdt = toZonedDateTime(from, converter);
if (zdt == null) {
return null;
}
return Year.of(zdt.getYear());
} catch (Exception ex) {
throw new IllegalArgumentException("Unable to parse 4-digit year from '" + str + "'", e);
}
}
}
}
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