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Diffstat (limited to 'sdo-java/branches/sdo-1.1-incubating/impl/src/main/java/org/apache/tuscany/sdo/helper/DataHelperImpl.java')
| -rw-r--r-- | sdo-java/branches/sdo-1.1-incubating/impl/src/main/java/org/apache/tuscany/sdo/helper/DataHelperImpl.java | 615 |
1 files changed, 615 insertions, 0 deletions
diff --git a/sdo-java/branches/sdo-1.1-incubating/impl/src/main/java/org/apache/tuscany/sdo/helper/DataHelperImpl.java b/sdo-java/branches/sdo-1.1-incubating/impl/src/main/java/org/apache/tuscany/sdo/helper/DataHelperImpl.java new file mode 100644 index 0000000000..d30da1cc4a --- /dev/null +++ b/sdo-java/branches/sdo-1.1-incubating/impl/src/main/java/org/apache/tuscany/sdo/helper/DataHelperImpl.java @@ -0,0 +1,615 @@ +/** + * + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 org.apache.tuscany.sdo.helper; + +import java.math.BigDecimal; +import java.math.BigInteger; +import java.text.ParseException; +import java.util.ArrayList; +import java.util.Calendar; +import java.util.Date; +import java.util.GregorianCalendar; +import java.util.Iterator; +import java.util.List; +import java.util.Locale; +import java.util.TimeZone; + +import org.apache.tuscany.sdo.util.DataObjectUtil; + +import commonj.sdo.Property; +import commonj.sdo.Type; +import commonj.sdo.helper.DataHelper; + +/** + * Data helper methods. + */ +public class DataHelperImpl implements DataHelper +{ + /** + * @param dateString - Must comply to the pattern of yyyy-MM-dd'T'HH:mm:ss'.'SSS'Z' + * @return null if dataString couldn't be parsed + */ + public synchronized Date toDate(String dateString) + { + if (dateString == null) + { + return null; + } + + SDOSimpleDateFormat format; + Date result = null; + boolean negative = false; + String formatString; + dateString = dateString.trim(); + + // Determine if it is a negative Date, DateTime, or Duration + + if (dateString.length() > 2 && dateString.charAt(0) == '-' && dateString.charAt(1) != '-') + { + negative = true; + dateString = dateString.substring(1); + } + + // SDO Date Format ends with a Z + + if (dateString.endsWith("Z")) + { + if (dateString.indexOf('.') != -1) + formatString = new String("yyyy-MM-dd'T'HH:mm:ss'.'S'Z'"); + else + formatString = new String ("yyyy-MM-dd'T'HH:mm:ss'Z'"); + + format = new SDOSimpleDateFormat(formatString); + format.setTimeZone(TimeZone.getTimeZone("UTC")); + + result = checkFormat(dateString, format); + + // If no match, continue to try further possibilities + + if (result != null) + { + if (negative) + return handleBCE(result); + else + return result; + } + + } + + // Duration format begins with a P + + if (dateString.startsWith("P")) + { + // Remove any spaces in the dateString + + String durationString = dateString.replaceAll(" ", ""); + + // Build the formatString based on the contents of dateString + + formatString = obtainDurationFormats(durationString); + format = new SDOSimpleDateFormat(formatString); + result = checkFormat(durationString, format); + if (result != null) + { + if (negative) + return handleNegative(result); + else + return result; + } + } + + formatString = obtainSpecificFormat(dateString); + + if (formatString != null) + { + format = new SDOSimpleDateFormat(formatString); + result = checkFormat(dateString, format); + + if (result != null) + { + if (negative) + return handleBCE(result); + else + return result; + } + } + + return null; + } + + private synchronized Date checkFormat(String dateString, SDOSimpleDateFormat format) + { + String formatPattern = format.toPattern(); + StringBuffer addedFields = new StringBuffer(); + String fieldsString, parseString; + SDOSimpleDateFormat compositeFormat; + Date dateValue; + + // For certain permissable input strings (e.g. those resulting from toYear + // toDay, toTime), there are fields missing which when converted to Date have + // default values. (e.g. Year -> 1970). Because of this, there can be great + // variation in how daylight savings time is accounted for. (e.g. In 1970 Britain + // was on DST year round, and during the summer of 1944 was on double daylight time.) + // Because these possible variations exist, it is assumed that the user would prefer + // the current handling of daylight savings time. As such, the year, month and day + // will default to their current values when absent. (The user should not be checking + // for Year=1970 (etc.) as evidence of taking the default, as explicitly setting a + // year to 1970 is valid and would then not be an instance of a default taken.) + + if (!(formatPattern.startsWith("P"))) + { + if (formatPattern.indexOf('y') == -1) + addedFields.append("yyyy "); + + if (formatPattern.indexOf('M') == -1) + addedFields.append("MM "); + + if (formatPattern.indexOf('d') == -1) + addedFields.append("dd "); + } + + fieldsString = addedFields.toString(); + + if (fieldsString.length() == 0) + { + parseString = dateString; + compositeFormat = format; + } + + else + { + compositeFormat = new SDOSimpleDateFormat(fieldsString); + dateValue = new Date(System.currentTimeMillis()); + parseString = compositeFormat.format(dateValue) + dateString; + compositeFormat.applyPattern(fieldsString + formatPattern); + } + + try + { + return compositeFormat.parse(parseString); + } + + catch (ParseException parseException) + { + } + + return null; + } + + public synchronized String obtainSpecificFormat(String dateString) + { + StringBuffer formatBuffer = new StringBuffer(); + int colonIndex = dateString.indexOf(':'); + int hyphenIndex = dateString.indexOf('-'); + + if (dateString.startsWith("--")) + { + if (dateString.charAt(2) == '-') // starts with --- + formatBuffer.append("'---'dd"); + else if (dateString.substring(2).indexOf('-') == -1) + formatBuffer.append("'--'MM"); + else + formatBuffer.append("'--'MM'-'dd"); + } + + else if (colonIndex == 1 || colonIndex == 2) + { + if (dateString.indexOf('.') != -1) + formatBuffer.append("HH:mm:ss'.'S"); + else if (dateString.substring(colonIndex + 1).indexOf(':') != -1) + formatBuffer.append("HH:mm:ss"); + else + formatBuffer.append("HH:mm"); + } + + else if (hyphenIndex != -1) + { + if (dateString.substring(hyphenIndex + 1).indexOf('-') == -1) + formatBuffer.append("yyyy-MM"); + else if (colonIndex != -1) + { + if (dateString.indexOf('.') != -1) + formatBuffer.append("yyyy-MM-dd'T'HH:mm:ss'.'S"); + else if (dateString.substring(colonIndex + 1).indexOf(':') != -1) + formatBuffer.append("yyyy-MM-dd'T'HH:mm:ss"); + else + formatBuffer.append("yyyy-MM-dd'T'HH:mm"); + } + else + formatBuffer.append ("yyyy-MM-dd"); + } + else if (colonIndex == -1) // indexOf('-') == -1 + { + formatBuffer.append("yyyy"); + } + else + return null; + + // Determine if a Time Zone is included and needs to be parsed. + // --------------------------------- + // The only letter allowed in the above formats is 'T'. + // All times zones include at least one letter other than 'T'. + + int i = 0; + boolean letterFound = false; + char currentChar; + while (i < dateString.length() && !letterFound) + { + currentChar = dateString.charAt(i); + if (Character.isLetter(currentChar) && currentChar != 'T') + letterFound = true;; + i++; + } + + if (letterFound) + formatBuffer.append(" z"); + + return formatBuffer.toString(); + } + + public synchronized String obtainDurationFormats(String dateString) + { + String firstPart, secondPart; + StringBuffer formatBuffer = new StringBuffer("'P'"); + + // Must divide it into two parts to distinguish between Months and Minutes + + int time_index = dateString.indexOf('T'); + if (time_index != -1) + { + firstPart = dateString.substring(0, time_index + 1); + secondPart = dateString.substring(time_index); + } + else + { + firstPart = dateString; + secondPart = null; + } + + if (firstPart.indexOf('Y') != -1) + formatBuffer.append("yyyy'Y'"); + if (firstPart.indexOf('M') != -1) + formatBuffer.append("MM'M'"); + if (firstPart.indexOf('D') != -1) + formatBuffer.append("dd'D'"); + if (time_index != -1) + { + formatBuffer.append("'T'"); + + if (secondPart.indexOf('H') != -1) + formatBuffer.append("HH'H'"); + if (secondPart.indexOf('M') != -1) + formatBuffer.append("mm'M'"); + if (secondPart.indexOf("S.") != -1) + formatBuffer.append("ss'S'.S"); + else if (secondPart.indexOf('S') != -1) + formatBuffer.append("ss'S'"); + } + + return formatBuffer.toString().replaceAll("''", ""); + } + + // Return a negative Duration if a negative sign existed in dateString + public synchronized Date handleNegative(Date output) + { + return new Date(0 - output.getTime()); + } + + // Return the date in BCE if a negative sign existed in dateString + + public synchronized Date handleBCE(Date output) + { + GregorianCalendar temp = new GregorianCalendar(); + temp.setTime(output); + temp.set(GregorianCalendar.ERA, GregorianCalendar.BC); + + return temp.getTime(); + } + + public synchronized Calendar toCalendar(String dateString) + { + return toCalendar(dateString, null); + } + + public synchronized Calendar toCalendar(String dateString, Locale locale) + { + if (dateString == null) + { + return null; + } + + Date date = toDate(dateString); + if (date == null) + { + return null; + } + + Calendar calendar = locale != null ? new GregorianCalendar(locale) : new GregorianCalendar(); + calendar.setTime(date); + return calendar; + } + + public synchronized String toDateTime(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss'.'SSS'Z'"); + f.setTimeZone(TimeZone.getTimeZone("UTC")); + + return f.format(date); + } + + public synchronized String toDuration(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("'P'yyyy'Y' MM'M' dd'D' 'T' HH'H' mm'M' ss'S.'SSS"); + + return f.format(date); + } + + public synchronized String toTime(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("HH:mm:ss'.'SSS zz"); + + return f.format(date); + } + + public synchronized String toDay(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("---dd zz"); + + return f.format(date); + } + + public synchronized String toMonth(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("--MM zz"); + + return f.format(date); + } + + public synchronized String toMonthDay(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("--MM-dd zz"); + + return f.format(date); + } + + public synchronized String toYear(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("yyyy zz"); + + return f.format(date); + } + + public synchronized String toYearMonth(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("yyyy-MM zz"); + + return f.format(date); + } + + public synchronized String toYearMonthDay(Date date) + { + if (date == null) + { + return null; + } + + SDOSimpleDateFormat f = new SDOSimpleDateFormat("yyyy-MM-dd zz"); + + return f.format(date); + } + + public synchronized String toDateTime(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toDateTime(calendar.getTime()); + } + + public synchronized String toDuration(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toDuration(calendar.getTime()); + } + + public synchronized String toTime(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toTime(calendar.getTime()); + } + + public synchronized String toDay(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toDay(calendar.getTime()); + } + + public synchronized String toMonth(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toMonth(calendar.getTime()); + } + + public synchronized String toMonthDay(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toMonthDay(calendar.getTime()); + } + + public synchronized String toYear(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toYear(calendar.getTime()); + } + + public synchronized String toYearMonth(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toYearMonth(calendar.getTime()); + } + + public synchronized String toYearMonthDay(Calendar calendar) + { + if (calendar == null) + { + return null; + } + + return toYearMonthDay(calendar.getTime()); + } + + public Object convert(Type type, Object value) + { + Class typeClass = type.getInstanceClass(); + if (typeClass.isInstance(value)) + return value; + + if (typeClass == BigDecimal.class) { + return DataObjectUtil.getBigDecimal(value); + } + else if (typeClass == BigInteger.class) { + return DataObjectUtil.getBigInteger(value); + } + else if (typeClass == boolean.class || typeClass == Boolean.class) { + return new Boolean(DataObjectUtil.getBoolean(value)); + } + else if (typeClass == byte.class || typeClass == Byte.class) { + return new Byte(DataObjectUtil.getByte(value)); + } + else if (typeClass == byte[].class) { + return DataObjectUtil.getBytes(value); + } + else if (typeClass == char.class || typeClass == Character.class) { + return new Character(DataObjectUtil.getChar(value)); + } + else if (typeClass == Date.class) { + return DataObjectUtil.getDate(value); + } + else if (typeClass == double.class || typeClass == Double.class) { + return new Double(DataObjectUtil.getDouble(value)); + } + else if (typeClass == float.class || typeClass == Float.class) { + return new Float(DataObjectUtil.getFloat(value)); + } + else if (typeClass == int.class || typeClass == Integer.class) { + return new Integer(DataObjectUtil.getInt(value)); + } + else if (typeClass == long.class || typeClass == Long.class) { + return new Long(DataObjectUtil.getLong(value)); + } + else if (typeClass == short.class || typeClass == Short.class) { + return new Short(DataObjectUtil.getShort(value)); + } + else if (typeClass == String.class) { + return DataObjectUtil.getString(value); + } + + throw new IllegalArgumentException(); + } + + public Object convert(Property property, Object value) + { + Type type = property.getType(); + if (!property.isMany()) + { + return convert(type, value); + } + else + { + List listValue = (List)value; + List listResult = new ArrayList(); + for (Iterator iter = listValue.iterator(); iter.hasNext(); ) { + listResult.add(convert(type, iter.next())); + } + return listResult; + } + } + +} |