| /******************************************************************************* |
| * 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 280554 - improvements to the function implementation |
| * David Carver - bug 282096 - improvements for surrogate handling |
| * Jesper Steen Moeller - bug 282096 - clean up string storage and fix surrogate handling |
| * Mukul Gandhi - bug 280798 - PsychoPath support for JDK 1.4 |
| *******************************************************************************/ |
| |
| package org.eclipse.wst.xml.xpath2.processor.internal.function; |
| |
| import java.math.BigInteger; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| |
| 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.SeqType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.QName; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSInteger; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSString; |
| import org.eclipse.wst.xml.xpath2.processor.internal.utils.CodePointIterator; |
| import org.eclipse.wst.xml.xpath2.processor.internal.utils.StringCodePointIterator; |
| |
| /** |
| * Returns the sequence of code points that constitute an xs:string. If $arg is |
| * a zero-length string or the empty sequence, the empty sequence is returned. |
| */ |
| public class FnStringToCodepoints extends Function { |
| private static Collection _expected_args = null; |
| |
| /** |
| * Constructor for FnStringToCodepoints. |
| */ |
| public FnStringToCodepoints() { |
| super(new QName("string-to-codepoints"), 1); |
| } |
| |
| /** |
| * Evaluate arguments. |
| * |
| * @param args |
| * argument expressions. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of evaluation. |
| */ |
| public ResultSequence evaluate(Collection args) throws DynamicError { |
| return string_to_codepoints(args); |
| } |
| |
| /** |
| * Base-Uri operation. |
| * |
| * @param args |
| * Result from the expressions evaluation. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of fn:base-uri operation. |
| */ |
| public static ResultSequence string_to_codepoints(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; |
| |
| XSString xstr = (XSString) arg1.first(); |
| |
| CodePointIterator cpi = new StringCodePointIterator(xstr.value()); |
| |
| for (int codePoint = cpi.current(); codePoint != CodePointIterator.DONE; codePoint = cpi.next()) { |
| rs.add(new XSInteger(BigInteger.valueOf(codePoint))); |
| } |
| |
| 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(new XSString(), SeqType.OCC_QMARK)); |
| } |
| |
| return _expected_args; |
| } |
| } |