net.sf.common.util.ValueUtils Maven / Gradle / Ivy
/**
* Copyright 2011-2012 the original author or authors.
*
* 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
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* 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.
*/
package net.sf.common.util;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Modifier;
import java.math.BigDecimal;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.servlet.http.HttpServletRequest;
import org.apache.commons.lang.math.NumberUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.util.StringUtils;
/**
* @author Steve M. Jung
* @since 2011. 6. 2. (version 0.0.1)
*/
public class ValueUtils {
private static final Logger logger = LoggerFactory.getLogger(ValueUtils.class);
public static final String DATEPATTERN_XSDDATETIME = "yyyy-MM-dd'T'HH:mm:ss'.'S";
public static final String DATEPATTERN_XSDSMALLDATETIME = "yyyy-MM-dd'T'HH:mm:ss";
public static final String DATEPATTERN_DATETIME = "yyyy-MM-dd HH:mm:ss'.'S";
public static final String DATEPATTERN_SMALLDATETIME = "yyyy-MM-dd HH:mm:ss";
public static final String DATEPATTERN_DATE = "yyyy-MM-dd";
public static final String DATEPATTERN_DATETIME_SHORT = "yyyyMMddHHmmssS";
public static final String DATEPATTERN_SMALLDATETIME_SHORT = "yyyyMMddHHmmss";
public static final String DATEPATTERN_DATE_SHORT = "yyyyMMdd";
public static final int DELIMITERCASETYPE_LOWER = 0;
public static final int DELIMITERCASETYPE_UPPER = 1;
public static final int DELIMITERCASETYPE_UPPERANDLOWER = 2;
private static final List DATEPATTERN_LIST;
static {
DATEPATTERN_LIST = new ArrayList();
for (Field field : ValueUtils.class.getFields()) {
int mod = field.getModifiers();
if (Modifier.isStatic(mod) && Modifier.isFinal(mod)) {
String name = field.getName();
if (name.startsWith("DATEPATTERN_") && String.class.equals(field.getType())) {
try {
DATEPATTERN_LIST.add((String) field.get(null));
} catch (IllegalArgumentException e) {
logger.warn(e.getMessage(), e);
} catch (IllegalAccessException e) {
logger.warn(e.getMessage(), e);
}
}
}
}
}
public static void assertNotNull(String name, Object value) {
if (value == null)
throw new IllegalArgumentException(name + " is null.");
}
public static void assertNotEmpty(String name, Object value) {
if (isEmpty(value))
throw new IllegalArgumentException(name + " is empty.");
}
public static boolean isEmpty(Object value) {
if (value == null) {
return true;
} else if (value instanceof String || value instanceof StringBuffer || value instanceof Character) {
return value.toString().trim().length() == 0;
} else if (value instanceof Collection) {
return ((Collection) value).isEmpty();
} else if (value instanceof Object[]) {
return ((Object[]) value).length == 0;
} else if (value instanceof Map) {
return ((Map) value).isEmpty();
}
return false;
}
public static List toList(T... value) {
if (isEmpty(value))
return new ArrayList(0);
List list = new ArrayList(value.length);
for (T v : value)
list.add(v);
return list;
}
public static Set toSet(T... value) {
if (isEmpty(value))
return new HashSet(0);
Set set = new HashSet(value.length);
for (T v : value)
set.add(v);
return set;
}
public static Map toMap(String... keyValues) {
Map map = new HashMap();
if (isEmpty(keyValues))
return map;
for (String keyValue : keyValues) {
if (isEmpty(keyValue))
continue;
if (keyValue.contains(":")) {
int index = keyValue.indexOf(":");
String key = keyValue.substring(0, index).trim();
String value = keyValue.substring(index + 1).trim();
map.put(key, value);
} else {
map.put(keyValue, null);
}
}
return map;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
private static final List PRIMITIVETYPE_LIST = toList(String.class, char.class, Character.class, byte.class, Byte.class, byte[].class,
Byte[].class, short.class, Short.class, int.class, Integer.class, long.class, Long.class, float.class, Float.class, double.class,
Double.class, BigDecimal.class, boolean.class, Boolean.class, Date.class);
public static boolean isPrimitive(Object obj) {
assertNotNull("obj", obj);
Class type = obj instanceof Class ? (Class) obj : obj.getClass();
return type.isPrimitive() || PRIMITIVETYPE_LIST.contains(type);
}
@SuppressWarnings("unchecked")
public static T toRequiredType(Object value, Class requiredType) {
assertNotNull("requiredType", requiredType);
if (value == null)
return null;
if (requiredType.isAssignableFrom(value.getClass()))
return (T) value;
if (requiredType == String.class)
return (T) toString(value);
if (requiredType.equals(Character.class) || requiredType.equals(char.class))
return (T) toCharacter(value);
if (requiredType.equals(Date.class))
return (T) toDate(value);
if (requiredType.equals(Boolean.class) || requiredType.equals(boolean.class))
return (T) toBoolean(value);
if (requiredType.equals(BigDecimal.class))
return (T) toBigDecimal(value);
if (requiredType.equals(Integer.class) || requiredType.equals(int.class))
return (T) toInteger(value);
if (requiredType.equals(Long.class) || requiredType.equals(long.class))
return (T) toLong(value);
if (requiredType.equals(Double.class) || requiredType.equals(double.class))
return (T) toDouble(value);
if (requiredType.equals(Short.class) || requiredType.equals(short.class))
return (T) toShort(value);
if (requiredType.equals(Float.class) || requiredType.equals(float.class))
return (T) toFloat(value);
if (requiredType.equals(Byte.class) || requiredType.equals(byte.class))
return (T) toByte(value);
if (requiredType.equals(Byte[].class) || requiredType.equals(byte[].class))
return (T) toBytes(value);
throw new IllegalArgumentException("Unsupported requiredType: " + requiredType);
}
public static String toString(Object value) {
return toString(value, null);
}
public static String toString(Object value, String defaultValue) {
if (value == null)
return defaultValue;
if (!isEmpty(value))
return toStringFromObject(value);
if (defaultValue == null)
return value == null ? null : value.toString();
return isEmpty(defaultValue) ? toStringFromObject(value) : defaultValue;
}
private static String toStringFromObject(Object value) {
if (value instanceof Date)
return toDateString((Date) value, DATEPATTERN_XSDDATETIME);
return value.toString();
}
public static String toNull(String value) {
return isEmpty(value) ? null : value;
}
public static String toNotNull(String value) {
return isEmpty(value) ? "" : value;
}
public static Boolean toBoolean(Object value) {
return toBoolean(value, null);
}
private final static Set TRUE_STRING_SET = toSet("true", "TRUE", "t", "T", "yes", "YES", "Yes", "y", "Y", "on", "1");
public static Boolean toBoolean(Object value, Boolean defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Boolean)
return (Boolean) value;
String str = value.toString().trim();
if (NumberUtils.isNumber(str))
return NumberUtils.toInt(str) > 0;
return TRUE_STRING_SET.contains(str);
}
public static String toDateString(Date value, String pattern) {
assertNotEmpty("pattern", pattern);
return value == null ? null : new SimpleDateFormat(pattern).format(value);
}
public static Date toDate(Object value) {
return toDate(value, (Date) null);
}
public static Date toDate(Object value, Date defaultValue) {
if (isEmpty(value))
return defaultValue;
if (value instanceof Date)
return (Date) value;
for (String pattern : DATEPATTERN_LIST) {
try {
return new SimpleDateFormat(pattern).parse(value.toString());
} catch (Exception e) {
}
}
throw new IllegalArgumentException("Couldn't find date pattern for value: " + value);
}
public static Date toDate(String value, String pattern) {
if (isEmpty(value))
return null;
try {
return new SimpleDateFormat(pattern).parse(value);
} catch (ParseException e) {
throw new IllegalArgumentException("Couldn't parse value: " + value + " for data pattern: " + pattern, e);
}
}
public static Character toCharacter(Object value) {
return toCharacter(value, null);
}
public static Character toCharacter(Object value, Character defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Character)
return (Character) value;
String str = toString(value);
if (str.length() == 0)
return defaultValue;
return str.charAt(0);
}
public static Short toShort(Object value) {
return toShort(value, null);
}
public static Short toShort(Object value, Short defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Short)
return (Short) value;
String str = value.toString();
if (NumberUtils.isNumber(str))
return NumberUtils.toShort(str);
return defaultValue;
}
public static Integer toInteger(Object value) {
return toInteger(value, null);
}
public static Integer toInteger(Object value, Integer defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Integer)
return (Integer) value;
String str = value.toString();
if (NumberUtils.isNumber(str))
return NumberUtils.toInt(str);
return defaultValue;
}
public static Long toLong(Object value) {
return toLong(value, null);
}
public static Long toLong(Object value, Long defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Long)
return (Long) value;
if (value instanceof Date)
return ((Date) value).getTime();
String str = value.toString();
if (NumberUtils.isNumber(str))
return NumberUtils.toLong(str);
return defaultValue;
}
public static Float toFloat(Object value) {
return toFloat(value, null);
}
public static Float toFloat(Object value, Float defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Float)
return (Float) value;
String str = value.toString();
if (NumberUtils.isNumber(str))
return NumberUtils.toFloat(str);
return defaultValue;
}
public static Double toDouble(Object value) {
return toDouble(value, null);
}
public static Double toDouble(Object value, Double defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Double)
return (Double) value;
String str = value.toString();
if (NumberUtils.isNumber(str))
return NumberUtils.toDouble(str);
return defaultValue;
}
public static BigDecimal toBigDecimal(Object value) {
return toBigDecimal(value, null);
}
public static BigDecimal toBigDecimal(Object value, BigDecimal defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof BigDecimal)
return (BigDecimal) value;
String str = value.toString();
return NumberUtils.isNumber(str) ? new BigDecimal(str) : defaultValue;
}
public static Byte toByte(Object value) {
return toByte(value, null);
}
public static Byte toByte(Object value, Byte defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof Byte)
return (Byte) value;
String str = value.toString();
return NumberUtils.toByte(str, defaultValue);
}
public static byte[] toBytes(Object value) {
return toBytes(value, null);
}
public static byte[] toBytes(Object value, byte[] defaultValue) {
if (value == null)
return defaultValue;
if (value instanceof byte[])
return (byte[]) value;
String str = value.toString();
return str.getBytes();
}
public static T populate(Object from, T to) {
return _populate(from, to);
}
public static T populate(Object from, T to, String... fieldNames) {
return _populate(from, to, fieldNames);
}
@SuppressWarnings("unchecked")
private static T _populate(Object from, T to, String... fieldNames) {
assertNotNull("object", from);
assertNotNull("to", to);
boolean byFieldName = fieldNames != null && fieldNames.length != 0;
try {
// From and to class types are instances of Map
if (from instanceof Map && to instanceof Map) {
Map fromMap = (Map) from;
Map toMap = (Map) to;
if (byFieldName) {
for (String fieldName : fieldNames)
toMap.put(fieldName, fromMap.get(fieldName));
} else {
toMap.putAll(fromMap);
}
}
// From and to class types are similar or same each others
else if (to.getClass().isAssignableFrom(from.getClass())) {
if (byFieldName) {
Map toFieldByNameMap = ReflectionUtils.getFieldByNameMap(to, true);
for (String fieldName : fieldNames) {
if (!toFieldByNameMap.containsKey(fieldName))
throw new IllegalArgumentException("Couldn't find a field: " + to.getClass().getName() + "." + fieldName);
Field field = toFieldByNameMap.get(fieldName);
field.set(to, field.get(from));
}
} else {
for (Field field : ReflectionUtils.getFieldList(to, true))
field.set(to, field.get(from));
}
}
// From object is an instance of HttpServletRequests
else if (from instanceof HttpServletRequest) {
HttpServletRequest request = (HttpServletRequest) from;
Map paramMap = request.getParameterMap();
if (byFieldName) {
Map toFieldByNameMap = ReflectionUtils.getFieldByNameMap(to, true);
for (String fieldName : fieldNames) {
if (!toFieldByNameMap.containsKey(fieldName))
throw new IllegalArgumentException("Couldn't find a field: " + to.getClass().getName() + "." + fieldName);
populate(paramMap, to, fieldName, toFieldByNameMap);
}
} else {
Map fieldByNameMap = ReflectionUtils.getFieldByNameMap(to, true);
for (String fieldName : paramMap.keySet()) {
if (!fieldByNameMap.containsKey(fieldName))
continue;
populate(paramMap, to, fieldName, fieldByNameMap);
}
}
}
// From object is an instance of Map
else if (from instanceof Map) {
Map fromMap = (Map) from;
if (byFieldName) {
Map toFieldByNameMap = ReflectionUtils.getFieldByNameMap(to, true);
for (String fieldName : fieldNames) {
if (!toFieldByNameMap.containsKey(fieldName))
throw new IllegalArgumentException("Couldn't find a field: " + to.getClass().getName() + "." + fieldName);
Field field = toFieldByNameMap.get(fieldName);
Object fromValue = fromMap.get(field.getName());
field.set(to, toRequiredType(fromValue, field.getType()));
}
} else {
for (Field field : ReflectionUtils.getFieldList(to, true)) {
if (!fromMap.containsKey(field.getName()))
continue;
Object fromValue = fromMap.get(field.getName());
field.set(to, toRequiredType(fromValue, field.getType()));
}
}
}
// To object is an instance of Map
else if (to instanceof Map) {
Map fromFieldByNameMap = ReflectionUtils.getFieldByNameMap(from, true);
Map toMap = (Map) to;
if (byFieldName) {
for (String fieldName : fieldNames) {
if (!fromFieldByNameMap.containsKey(fieldName))
throw new IllegalArgumentException("Couldn't find a field: " + from.getClass().getName() + "." + fieldName);
Field field = fromFieldByNameMap.get(fieldName);
toMap.put(fieldName, field.get(from));
}
} else {
for (String fieldName : fromFieldByNameMap.keySet()) {
Field field = fromFieldByNameMap.get(fieldName);
toMap.put(fieldName, field.get(from));
}
}
}
// Else
else {
Map fromFieldByNameMap = ReflectionUtils.getFieldByNameMap(from, true);
if (byFieldName) {
Map toFieldByNameMap = ReflectionUtils.getFieldByNameMap(to, true);
for (String fieldName : fieldNames) {
if (!fromFieldByNameMap.containsKey(fieldName))
throw new IllegalArgumentException("Couldn't find a field: " + from.getClass().getName() + "." + fieldName);
if (!toFieldByNameMap.containsKey(fieldName))
throw new IllegalArgumentException("Couldn't find a field: " + to.getClass().getName() + "." + fieldName);
Object fromValue = fromFieldByNameMap.get(fieldName).get(from);
Field toField = toFieldByNameMap.get(fieldName);
toField.set(to, toRequiredType(fromValue, toField.getType()));
}
} else {
for (Field toField : ReflectionUtils.getFieldList(to, true)) {
if (!fromFieldByNameMap.containsKey(toField.getName()))
continue;
Object fromValue = fromFieldByNameMap.get(toField.getName()).get(from);
toField.set(to, toRequiredType(fromValue, toField.getType()));
}
}
}
} catch (RuntimeException e) {
throw e;
} catch (IllegalAccessException e) {
throw new RuntimeException(e);
}
return to;
}
private static void populate(Map fromParamMap, Object to, String fieldName, Map toFieldByNameMap)
throws IllegalArgumentException, IllegalAccessException {
Field field = toFieldByNameMap.get(fieldName);
String[] values = fromParamMap.get(fieldName);
String value = isEmpty(values) ? null : values[0];
value = value == null || value.length() == 0 ? null : value;
// value length is more than 1
if (values.length > 1) {
if (field.getType().equals(String[].class)) {
toFieldByNameMap.get(fieldName).set(to, values);
return;
}
throw new RuntimeException("Not supported style, yet. fieldName: " + fieldName);
}
toFieldByNameMap.get(fieldName).set(to, toRequiredType(value, field.getType()));
}
public static String populate(String value, Map paramMap) {
if (isEmpty(paramMap))
return value;
for (String key : paramMap.keySet()) {
String propKey = "${" + key + "}";
if (!value.contains(propKey))
continue;
value = StringUtils.replace(value, propKey, paramMap.get(key) + "");
}
return value;
}
/**
* Convert camelCaseValue to another delmiterCaseValue such as underscores or hyphens
*
*
* toDelimiterCase123 -> to_delimiter_case123
*
*
* @param camelCaseValue
* @param delimiter
* @return delimited value
*/
public static String toDelimited(String camelCaseValue, Character delimiter) {
return toDelimited(camelCaseValue, delimiter, false);
}
/**
* Convert camelsCaseValue to another delmiterCaseValue such as underscores or hyphens
*
*
* numberAsUpperCase == false:
* toDelimiterCase123 -> to_delimiter_case123 (default)
*
* numberAsUpperCase == true:
* toDelimiterCase123 -> to_delimiter_case_123
*
*
* @param camelCaseValue
* @param delimiter
* @param numberAsUpperCase
* @return delimited value
*/
public static String toDelimited(String camelCaseValue, Character delimiter, boolean numberAsUpperCase) {
if (isEmpty(camelCaseValue))
return camelCaseValue;
if (delimiter == null)
return camelCaseValue.toLowerCase();
StringBuffer buf = new StringBuffer();
boolean first = true;
boolean wasNumber = false;
for (char c : camelCaseValue.toCharArray()) {
boolean isNumber = false;
// UpperCase
if (c > 64 && c < 91) {
if (first)
first = false;
else
buf.append(delimiter);
buf.append((char) (c + 32));
}
// LowerCase
else if (c > 96 && c < 123) {
if (first)
first = false;
buf.append(c);
}
// Number and number as UpperCase
else if (c > 48 && c < 58 && numberAsUpperCase) {
if (first)
first = false;
else if (!wasNumber)
buf.append(delimiter);
buf.append(c);
isNumber = true;
}
// The others
else {
buf.append(c);
}
wasNumber = isNumber;
}
return buf.toString();
}
/**
* Convert delimiterCaseValue(such as underscores or hyphens) to camelCaseValue
*
*
* Underscores: (all lower, all caps or both character cases)
* to_camel_case123 -> toCamelCase123
* to_camel_case_123 -> toCamelCase123
* TO_CAMEL_CASE123 -> toCamelCase123
* TO_CAMEL_CASE_123 -> toCamelCase123
* To_Camel_Case123 -> toCamelCase123
* To_Camel_Case_123 -> toCamelCase123
*
* Hyphens:
* to-camel-case123 -> toCamelCase123
* to-camel-case-123 -> toCamelCase123
* TO-CAMEL-CASE123 -> toCamelCase123
* TO-CAMEL-CASE-123 -> toCamelCase123
* To-Camel-Case123 -> toCamelCase123
* To-Camel-Case-123 -> toCamelCase123
*
*
* @param delimiterCaseValue
* @param delimiter
* @return camel case value
*/
public static String toCamelCase(String delimiterCaseValue, Character delimiter) {
return toCamelCase(delimiterCaseValue, delimiter, false);
}
public static String toCamelCase(String delimiterCaseValue, Character delimiter, boolean upper) {
if (isEmpty(delimiterCaseValue) || delimiter == null)
return delimiterCaseValue;
StringBuffer buf = new StringBuffer();
boolean first = true;
boolean wasDelimiter = false;
for (char c : delimiterCaseValue.toCharArray()) {
// Delimiter
if (c == delimiter) {
if (first || wasDelimiter)
buf.append(c);
else
wasDelimiter = true;
}
// UpperCase
else if (c > 64 && c < 91) {
if (wasDelimiter) {
buf.append(c);
wasDelimiter = false;
} else if (first) {
buf.append(upper ? c : (char) (c + 32));
first = false;
} else {
buf.append((char) (c + 32));
}
}
// LowerCase
else if (c > 96 && c < 123) {
if (wasDelimiter) {
buf.append((char) (c - 32));
wasDelimiter = false;
} else if (first) {
buf.append(upper ? (char) (c - 32) : c);
first = false;
} else {
buf.append(c);
}
}
// The others
else {
if (wasDelimiter)
wasDelimiter = false;
buf.append(c);
}
}
return buf.toString();
}
public static Throwable unwrap(Throwable t) {
while (t instanceof InvocationTargetException)
t = ((InvocationTargetException) t).getTargetException();
return t;
}
}
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