Java tutorial
/*----------------------------------------------------------------------------- ** ** -Gozer is not Zuul- ** ** Copyright 2017 by SwordLord - the coding crew - https://www.swordlord.com/ ** and individual authors ** ** This program is free software; you can redistribute it and/or modify it ** under the terms of the GNU Affero General Public License as published by the Free ** Software Foundation, either version 3 of the License, or (at your option) ** any later version. ** ** This program 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 Affero General Public License for ** more details. ** ** You should have received a copy of the GNU Affero General Public License along ** with this program. If not, see <http://www.gnu.org/licenses/>. ** **----------------------------------------------------------------------------- ** ** $Id: DataTypeHelper.java 1170 2011-10-07 16:24:10Z LordEidi $ ** -----------------------------------------------------------------------------*/ package com.swordlord.gozer.datatypeformat; import java.math.BigDecimal; import java.text.DateFormat; import java.text.ParseException; import java.util.Calendar; import java.util.Date; import com.swordlord.jalapeno.DBGenerator; import org.apache.commons.lang.BooleanUtils; import org.apache.commons.lang.ClassUtils; import org.apache.commons.lang.ObjectUtils; import org.apache.commons.lang.math.NumberUtils; import org.apache.commons.lang.time.DateUtils; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * @author LordEidi * */ public class DataTypeHelper { /** * Return compatible class for typedValue based on untypedValueClass * * @param untypedValueClass * @param typedValue * @return */ public static Object fromDataType(Class<?> untypedValueClass, Object typedValue) { Log LOG = LogFactory.getLog(DataTypeHelper.class); if (typedValue == null) { return null; } if (untypedValueClass == null) { return typedValue; } if (ClassUtils.isAssignable(typedValue.getClass(), untypedValueClass)) { return typedValue; } String strTypedValue = null; boolean isStringTypedValue = typedValue instanceof String; Number numTypedValue = null; boolean isNumberTypedValue = typedValue instanceof Number; Boolean boolTypedValue = null; boolean isBooleanTypedValue = typedValue instanceof Boolean; Date dateTypedValue = null; boolean isDateTypedValue = typedValue instanceof Date; if (isStringTypedValue) { strTypedValue = (String) typedValue; } if (isNumberTypedValue) { numTypedValue = (Number) typedValue; } if (isBooleanTypedValue) { boolTypedValue = (Boolean) typedValue; } if (isDateTypedValue) { dateTypedValue = (Date) typedValue; } Object v = null; if (String.class.equals(untypedValueClass)) { v = ObjectUtils.toString(typedValue); } else if (BigDecimal.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = NumberUtils.createBigDecimal(strTypedValue); } else if (isNumberTypedValue) { v = new BigDecimal(numTypedValue.doubleValue()); } else if (isBooleanTypedValue) { v = new BigDecimal(BooleanUtils.toInteger(boolTypedValue.booleanValue())); } else if (isDateTypedValue) { v = new BigDecimal(dateTypedValue.getTime()); } } else if (Boolean.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = BooleanUtils.toBooleanObject(strTypedValue); } else if (isNumberTypedValue) { v = BooleanUtils.toBooleanObject(numTypedValue.intValue()); } else if (isDateTypedValue) { v = BooleanUtils.toBooleanObject((int) dateTypedValue.getTime()); } } else if (Byte.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = Byte.valueOf(strTypedValue); } else if (isNumberTypedValue) { v = new Byte(numTypedValue.byteValue()); } else if (isBooleanTypedValue) { v = new Byte((byte) BooleanUtils.toInteger(boolTypedValue.booleanValue())); } else if (isDateTypedValue) { v = new Byte((byte) dateTypedValue.getTime()); } } else if (byte[].class.equals(untypedValueClass)) { if (isStringTypedValue) { v = strTypedValue.getBytes(); } } else if (Double.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = NumberUtils.createDouble(strTypedValue); } else if (isNumberTypedValue) { v = new Double(numTypedValue.doubleValue()); } else if (isBooleanTypedValue) { v = new Double(BooleanUtils.toInteger(boolTypedValue.booleanValue())); } else if (isDateTypedValue) { v = new Double(dateTypedValue.getTime()); } } else if (Float.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = NumberUtils.createFloat(strTypedValue); } else if (isNumberTypedValue) { v = new Float(numTypedValue.floatValue()); } else if (isBooleanTypedValue) { v = new Float(BooleanUtils.toInteger(boolTypedValue.booleanValue())); } else if (isDateTypedValue) { v = new Float(dateTypedValue.getTime()); } } else if (Short.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = NumberUtils.createInteger(strTypedValue); } else if (isNumberTypedValue) { v = new Integer(numTypedValue.intValue()); } else if (isBooleanTypedValue) { v = BooleanUtils.toIntegerObject(boolTypedValue.booleanValue()); } else if (isDateTypedValue) { v = new Integer((int) dateTypedValue.getTime()); } } else if (Integer.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = NumberUtils.createInteger(strTypedValue); } else if (isNumberTypedValue) { v = new Integer(numTypedValue.intValue()); } else if (isBooleanTypedValue) { v = BooleanUtils.toIntegerObject(boolTypedValue.booleanValue()); } else if (isDateTypedValue) { v = new Integer((int) dateTypedValue.getTime()); } } else if (Long.class.equals(untypedValueClass)) { if (isStringTypedValue) { v = NumberUtils.createLong(strTypedValue); } else if (isNumberTypedValue) { v = new Long(numTypedValue.longValue()); } else if (isBooleanTypedValue) { v = new Long(BooleanUtils.toInteger(boolTypedValue.booleanValue())); } else if (isDateTypedValue) { v = new Long(dateTypedValue.getTime()); } } else if (java.sql.Date.class.equals(untypedValueClass)) { if (isNumberTypedValue) { v = new java.sql.Date(numTypedValue.longValue()); } else if (isDateTypedValue) { v = new java.sql.Date(dateTypedValue.getTime()); } } else if (java.sql.Time.class.equals(untypedValueClass)) { if (isNumberTypedValue) { v = new java.sql.Time(numTypedValue.longValue()); } else if (isDateTypedValue) { v = new java.sql.Time(dateTypedValue.getTime()); } } else if (java.sql.Timestamp.class.equals(untypedValueClass)) { if (isNumberTypedValue) { v = new java.sql.Timestamp(numTypedValue.longValue()); } else if (isDateTypedValue) { v = new java.sql.Timestamp(dateTypedValue.getTime()); } } else if (Date.class.equals(untypedValueClass)) { if (isNumberTypedValue) { v = new Date(numTypedValue.longValue()); } else if (isStringTypedValue) { try { v = DateFormat.getDateInstance().parse(strTypedValue); } catch (ParseException e) { LOG.error("Unable to parse the date : " + strTypedValue); LOG.debug(e.getMessage()); } } } return v; } /** * @param dataTypeClass * @param untypedValue * @return */ public static Object toDataType(Class<?> dataTypeClass, Object untypedValue) { if ((dataTypeClass == null) || (untypedValue == null) || ClassUtils.isAssignable(untypedValue.getClass(), dataTypeClass)) { if (Date.class == dataTypeClass) { return DateUtils.truncate(untypedValue, Calendar.DATE); } return untypedValue; } Object v = null; String strUntypedValue = null; boolean isStringUntypedValue = untypedValue instanceof String; Number numUntypedValue = null; boolean isNumberUntypedValue = untypedValue instanceof Number; if (isStringUntypedValue) { strUntypedValue = (String) untypedValue; } if (isNumberUntypedValue) { numUntypedValue = (Number) untypedValue; } if (dataTypeClass == boolean.class || dataTypeClass == Boolean.class) { if (isNumberUntypedValue) { v = BooleanUtils.toBooleanObject(numUntypedValue.intValue()); } else if (isStringUntypedValue) { v = BooleanUtils.toBooleanObject(strUntypedValue); } } else if (dataTypeClass == Integer.class) { if (isNumberUntypedValue) { v = new Integer(numUntypedValue.intValue()); } else if (isStringUntypedValue) { v = NumberUtils.createInteger(strUntypedValue); } } else if (dataTypeClass == Double.class) { if (isNumberUntypedValue) { v = new Double(numUntypedValue.doubleValue()); } else if (isStringUntypedValue) { v = NumberUtils.createDouble(strUntypedValue); } } else if (dataTypeClass == Date.class) { if (isNumberUntypedValue) { v = DateUtils.truncate(new Date(numUntypedValue.longValue()), Calendar.DATE); } } else { v = ObjectUtils.toString(untypedValue); } return v; } }