| /******************************************************************************* |
| * Copyright (c) 2009, 2010 Mukul Gandhi, and others |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Mukul Gandhi - bug 281822 - initial API and implementation |
| * David Carver - bug 282223 - implementation of xs:duration |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.function; |
| |
| import java.util.ArrayList; |
| import java.util.Calendar; |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| import org.eclipse.wst.xml.xpath2.api.EvaluationContext; |
| import org.eclipse.wst.xml.xpath2.api.ResultBuffer; |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.api.StaticContext; |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.internal.SeqType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.QName; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSDate; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSDateTime; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSDuration; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSTime; |
| |
| /** |
| * A special constructor function for constructing a xs:dateTime value from a xs:date |
| * value and a xs:time value. |
| * ref: Section 5.2 of the F&O spec, http://www.w3.org/TR/xpath-functions/. |
| */ |
| public class FnDateTime extends Function { |
| private static Collection _expected_args = null; |
| |
| /** |
| * Constructor for FnDateTime. |
| */ |
| public FnDateTime() { |
| super(new QName("dateTime"), 2); |
| } |
| |
| /** |
| * Evaluate arguments. |
| * |
| * @param args |
| * argument expressions. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of evaluation. |
| */ |
| public ResultSequence evaluate(Collection args, EvaluationContext ec) throws DynamicError { |
| return dateTime(args, ec.getStaticContext()); |
| } |
| |
| /** |
| * Evaluate the function using the arguments passed. |
| * |
| * @param args |
| * Result from the expressions evaluation. |
| * @param sc |
| * Result of static context operation. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of the fn:dateTime operation. |
| */ |
| public static ResultSequence dateTime(Collection args, StaticContext sc) |
| throws DynamicError { |
| |
| Collection cargs = Function.convert_arguments(args, expected_args()); |
| |
| // get args |
| Iterator argiter = cargs.iterator(); |
| ResultSequence arg1 = (ResultSequence) argiter.next(); |
| ResultSequence arg2 = (ResultSequence) argiter.next(); |
| |
| // if either of the parameter is an empty sequence, the result |
| // is an empty sequence |
| if (arg1.empty() || arg2.empty()) { |
| return ResultBuffer.EMPTY; |
| } |
| XSDate param1 = (XSDate)arg1.first(); |
| XSTime param2 = (XSTime)arg2.first(); |
| |
| Calendar cal = Calendar.getInstance(); |
| cal.set(param1.year(), param1.month() - 1, param1.day()); |
| cal.set(Calendar.HOUR_OF_DAY, param2.hour()); |
| cal.set(Calendar.MINUTE, param2.minute()); |
| cal.set(Calendar.SECOND, (new Double(Math.floor(param2.second())).intValue())); |
| cal.set(Calendar.MILLISECOND, 0); |
| |
| XSDuration dateTimeZone = param1.tz(); |
| XSDuration timeTimeZone = param2.tz(); |
| if ((dateTimeZone != null && timeTimeZone != null) && |
| !dateTimeZone.getStringValue().equals(timeTimeZone.getStringValue())) { |
| // it's an error, if the arguments have different timezones |
| throw DynamicError.inconsistentTimeZone(); |
| } else if (dateTimeZone == null && timeTimeZone != null) { |
| return new XSDateTime(cal, timeTimeZone); |
| } else if (dateTimeZone != null && timeTimeZone == null) { |
| return new XSDateTime(cal, dateTimeZone); |
| } |
| else if ((dateTimeZone != null && timeTimeZone != null) && |
| dateTimeZone.getStringValue().equals(timeTimeZone.getStringValue())) { |
| return new XSDateTime(cal, dateTimeZone); |
| } |
| else { |
| return new XSDateTime(cal, null); |
| } |
| } |
| |
| /** |
| * Obtain a list of expected arguments. |
| * |
| * @return Result of operation. |
| */ |
| public synchronized static Collection expected_args() { |
| if (_expected_args == null) { |
| _expected_args = new ArrayList(); |
| _expected_args.add(new SeqType(new XSDate(), SeqType.OCC_QMARK)); |
| _expected_args.add(new SeqType(new XSTime(), SeqType.OCC_QMARK)); |
| } |
| |
| return _expected_args; |
| } |
| } |
| |