| /******************************************************************************* |
| * Copyright (c) 2005, 2009 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 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.function; |
| |
| import org.eclipse.wst.xml.xpath2.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.ResultSequence; |
| import org.eclipse.wst.xml.xpath2.processor.ResultSequenceFactory; |
| import org.eclipse.wst.xml.xpath2.processor.internal.*; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.*; |
| |
| import java.util.*; |
| |
| /** |
| * Returns an expanded-QName for node kinds that can have names. For other kinds |
| * of nodes it returns the empty sequence. If $arg is the empty sequence, the |
| * empty sequence is returned. |
| */ |
| public class FnNodeName extends Function { |
| private static Collection _expected_args = null; |
| |
| /** |
| * Constructor for FnNodeName. |
| */ |
| public FnNodeName() { |
| super(new QName("node-name"), 1); |
| } |
| |
| /** |
| * Evaluate arguments. |
| * |
| * @param args |
| * argument expressions. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of evaluation. |
| */ |
| @Override |
| public ResultSequence evaluate(Collection args) throws DynamicError { |
| return node_name(args); |
| } |
| |
| /** |
| * Node-Name operation. |
| * |
| * @param args |
| * Result from the expressions evaluation. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of fn:node-name operation. |
| */ |
| public static ResultSequence node_name(Collection args) throws DynamicError { |
| Collection cargs = Function.convert_arguments(args, expected_args()); |
| |
| ResultSequence rs = ResultSequenceFactory.create_new(); |
| |
| ResultSequence arg1 = (ResultSequence) cargs.iterator().next(); |
| if (arg1.empty()) |
| return rs; |
| |
| NodeType nt = (NodeType) arg1.first(); |
| |
| QName nodename = nt.node_name(); |
| if (nodename == null) |
| return rs; |
| |
| rs.add(nodename); |
| |
| return rs; |
| } |
| |
| /** |
| * 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(SeqType.OCC_QMARK)); |
| } |
| |
| return _expected_args; |
| } |
| } |