| /******************************************************************************* |
| * Copyright (c) 2005, 2010 Andrea Bittau, University College London, 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: |
| * Andrea Bittau - initial API and implementation from the PsychoPath XPath 2.0 |
| * Mukul Gandhi - bug 276134 - improvements to schema aware primitive type support |
| * for attribute/element nodes |
| * Jesper Moller - bug 275610 - Avoid big time and memory overhead for externals |
| * David Carver - bug 281186 - implementation of fn:id and fn:idref |
| * David Carver (STAR) - bug 289304 - fix schema awarness of types on elements |
| * Jesper Moller - bug 297958 - Fix fn:nilled for elements |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| * Mukul Gandhi - bug 323900 - improving computing the typed value of element & |
| * attribute nodes, where the schema type of nodes |
| * are simple, with varieties 'list' and 'union'. |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.types; |
| |
| import org.apache.xerces.dom.PSVIElementNSImpl; |
| import org.eclipse.wst.xml.xpath2.api.ResultBuffer; |
| import org.eclipse.wst.xml.xpath2.api.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.api.typesystem.TypeDefinition; |
| import org.eclipse.wst.xml.xpath2.api.typesystem.TypeModel; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.builtin.BuiltinTypeLibrary; |
| import org.w3c.dom.Element; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.NodeList; |
| import org.w3c.dom.Text; |
| import org.w3c.dom.TypeInfo; |
| |
| /** |
| * A representation of the ElementType datatype |
| */ |
| public class ElementType extends NodeType { |
| private static final String ELEMENT = "element"; |
| |
| private static final String SCHEMA_INSTANCE = "http://www.w3.org/2001/XMLSchema-instance"; |
| private static final String NIL_ATTRIBUTE = "nil"; |
| private static final String TRUE_VALUE = "true"; |
| |
| private Element _value; |
| |
| private String _string_value; |
| |
| /** |
| * Initialises to a null element |
| */ |
| public ElementType() { |
| this(null, null); |
| } |
| |
| /** |
| * Initialises according to the supplied parameters |
| * |
| * @param v |
| * The element being represented |
| */ |
| public ElementType(Element v, TypeModel tm) { |
| super(v, tm); |
| _value = v; |
| |
| _string_value = null; |
| } |
| |
| /** |
| * Retrieves the actual element value being represented |
| * |
| * @return Actual element value being represented |
| */ |
| public Element value() { |
| return _value; |
| } |
| |
| /** |
| * Retrieves the datatype's full pathname |
| * |
| * @return "element" which is the datatype's full pathname |
| */ |
| public String string_type() { |
| return ELEMENT; |
| } |
| |
| /** |
| * Retrieves a String representation of the element being stored |
| * |
| * @return String representation of the element being stored |
| */ |
| public String getStringValue() { |
| // XXX can we cache ? |
| if (_string_value != null) |
| return _string_value; |
| |
| _string_value = textnode_strings(_value); |
| |
| return _string_value; |
| } |
| |
| /** |
| * Creates a new ResultSequence consisting of the element stored |
| * |
| * @return New ResultSequence consisting of the element stored |
| */ |
| public ResultSequence typed_value() { |
| |
| TypeDefinition typeDef = getType(); |
| |
| if (typeDef != null) { |
| if (!isNilled(_value)) { |
| if (typeDef != null) { |
| return getXDMTypedValue(typeDef, typeDef.getSimpleTypes(_value)); |
| } |
| else { |
| return new XSUntypedAtomic(getStringValue()); |
| } |
| } |
| } |
| else { |
| return new XSUntypedAtomic(getStringValue()); |
| } |
| return ResultBuffer.EMPTY; |
| } |
| |
| private boolean isNilled(Element _value2) { |
| return TRUE_VALUE.equals(_value2.getAttributeNS(SCHEMA_INSTANCE, NIL_ATTRIBUTE)); |
| } |
| |
| // recursively concatenate TextNode strings |
| /** |
| * Recursively concatenate TextNode strings |
| * |
| * @param node |
| * Node to recurse |
| * @return String representation of the node supplied |
| */ |
| public static String textnode_strings(Node node) { |
| String result = ""; |
| |
| if (node.getNodeType() == Node.TEXT_NODE) { |
| Text tn = (Text) node; |
| result += tn.getData(); |
| } |
| |
| NodeList nl = node.getChildNodes(); |
| |
| StringBuffer buf = new StringBuffer(result); |
| // concatenate children |
| for (int i = 0; i < nl.getLength(); i++) { |
| Node n = nl.item(i); |
| |
| buf.append(textnode_strings(n)); |
| } |
| |
| result = buf.toString(); |
| return result; |
| } |
| |
| /** |
| * Retrieves the name of the node |
| * |
| * @return QName representation of the name of the node |
| */ |
| public QName node_name() { |
| QName name = new QName(_value.getPrefix(), _value.getLocalName(), _value.getNamespaceURI()); |
| |
| return name; |
| } |
| |
| public ResultSequence nilled() { |
| |
| if (_value instanceof PSVIElementNSImpl) { |
| PSVIElementNSImpl psviElement = (PSVIElementNSImpl) _value; |
| return XSBoolean.valueOf(psviElement.getNil()); |
| } |
| else { |
| return XSBoolean.FALSE; |
| } |
| } |
| |
| /** |
| * @since 1.1 |
| */ |
| public boolean isID() { |
| return isElementType(SCHEMA_TYPE_ID); |
| } |
| |
| /** |
| * @since 1.1 |
| */ |
| public boolean isIDREF() { |
| return isElementType(SCHEMA_TYPE_IDREF); |
| } |
| |
| protected boolean isElementType(String typeName) { |
| TypeInfo typeInfo = _value.getSchemaTypeInfo(); |
| return isType(typeInfo, typeName); |
| } |
| |
| public TypeDefinition getTypeDefinition() { |
| return BuiltinTypeLibrary.XS_UNTYPED; |
| } |
| } |