| /******************************************************************************* |
| * Copyright (c) 2009, 2010 Jesper Steen Moller, 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: |
| * Jesper Steen Moller - initial API and implementation |
| * Jesper Steen Moller - bug 281028 - avg/min/max/sum work |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.utils; |
| |
| import java.util.Collection; |
| import java.util.Iterator; |
| |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.api.Item; |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.AnyAtomicType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.AnyType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.NodeType; |
| |
| /** |
| * Generic type promoter for handling subtype substitution and type promotions for functions and operators. |
| */ |
| public abstract class TypePromoter { |
| private Class targetType = null; |
| |
| abstract public AnyAtomicType doPromote(AnyAtomicType value) throws DynamicError; |
| |
| public final AnyAtomicType promote(AnyType value) throws DynamicError { |
| // This is a short cut, really |
| if (value.getClass() == getTargetType()) return (AnyAtomicType)value; |
| |
| return doPromote(atomize(value)); |
| } |
| |
| /** |
| * @param typeToConsider The |
| * @return The supertype to treat it as (i.e. if a xs:nonNegativeInteger is treated as xs:number) |
| */ |
| abstract protected Class substitute(Class typeToConsider); |
| |
| abstract protected boolean checkCombination(Class newType); |
| |
| public void considerType(Class typeToConsider) throws DynamicError { |
| Class baseType = substitute(typeToConsider); |
| |
| if (baseType == null) { |
| throw DynamicError.argument_type_error(typeToConsider); |
| } |
| |
| if (targetType == null) { |
| targetType = baseType; |
| } else { |
| if (! checkCombination(baseType)) { |
| throw DynamicError.argument_type_error(typeToConsider); |
| } |
| } |
| } |
| |
| public void considerTypes(Collection typesToConsider) throws DynamicError { |
| for (Iterator iter = typesToConsider.iterator(); iter.hasNext();) { |
| considerType((Class)iter.next()); |
| } |
| } |
| |
| public void considerSequence(ResultSequence sequenceToConsider) throws DynamicError { |
| for (int i = 0; i < sequenceToConsider.size(); ++i) { |
| Item item = sequenceToConsider.item(i); |
| considerValue(item); |
| } |
| } |
| |
| public Class getTargetType() { |
| return targetType; |
| } |
| |
| protected void setTargetType(Class class1) { |
| this.targetType = class1; |
| } |
| |
| public AnyAtomicType atomize(Item at) { |
| if (at instanceof NodeType) { |
| return (AnyAtomicType)((NodeType)at).typed_value().first(); |
| } |
| else { |
| return (AnyAtomicType)at; |
| } |
| } |
| |
| public void considerValue(Item at) throws DynamicError { |
| considerType(atomize(at).getClass()); |
| } |
| |
| |
| } |