| /******************************************************************************* |
| * 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 |
| * Jesper Moller - bug 280555 - Add pluggable collation support |
| * David Carver (STAR) - bug 262765 - fixed collation and comparison issues. |
| * 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 java.util.Iterator; |
| |
| import org.eclipse.wst.xml.xpath2.api.DynamicContext; |
| 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.processor.DynamicError; |
| import org.eclipse.wst.xml.xpath2.processor.internal.SeqType; |
| 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; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.NumericType; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.QName; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSBoolean; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSDuration; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSInteger; |
| import org.eclipse.wst.xml.xpath2.processor.internal.types.XSString; |
| |
| /** |
| * Returns a sequence of positive integers giving the positions within the |
| * sequence $seqParam of items that are equal to $srchParam. |
| */ |
| public class FnIndexOf extends AbstractCollationEqualFunction { |
| |
| private static Collection _expected_args = null; |
| |
| /** |
| * Constructor for FnIndexOf. |
| */ |
| public FnIndexOf() { |
| super(new QName("index-of"), 2, 3); |
| } |
| |
| /** |
| * Evaluate arguments. |
| * |
| * @param args |
| * argument expressions. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of evaluation. |
| */ |
| public ResultSequence evaluate(Collection args, EvaluationContext ec) { |
| return index_of(args, ec.getDynamicContext()); |
| } |
| |
| /** |
| * Obtain a comparable type. |
| * |
| * @param at |
| * expression of any type. |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of operation. |
| */ |
| private static CmpEq get_comparable(AnyType at) throws DynamicError { |
| if (at instanceof NodeType) { |
| XSString nodeString = new XSString(at.getStringValue()); |
| return nodeString; |
| } |
| |
| if (!(at instanceof AnyAtomicType)) |
| DynamicError.throw_type_error(); |
| |
| if (!(at instanceof CmpEq)) |
| throw DynamicError.not_cmp(null); |
| |
| return (CmpEq) at; |
| } |
| |
| /** |
| * Index-Of operation. |
| * |
| * @param args |
| * Result from the expressions evaluation. |
| * @param dynamicContext |
| * @throws DynamicError |
| * Dynamic error. |
| * @return Result of fn:index-of operation. |
| */ |
| public static ResultSequence index_of(Collection args, DynamicContext dc) { |
| Function.convert_arguments(args, expected_args()); |
| |
| // get args |
| Iterator citer = args.iterator(); |
| ResultSequence arg1 = (ResultSequence) citer.next(); |
| ResultSequence arg2 = (ResultSequence) citer.next(); |
| |
| if (arg1.empty()) { |
| return ResultBuffer.EMPTY; |
| } |
| |
| // sanity chex |
| if (arg2.size() != 1) |
| DynamicError.throw_type_error(); |
| |
| String collationUri = dc.getCollationProvider().getDefaultCollation(); |
| if (citer.hasNext()) { |
| ResultSequence arg3 = (ResultSequence) citer.next(); |
| if (!arg3.empty()) { |
| XSString collation = (XSString) arg3.first(); |
| collationUri = collation.getStringValue(); |
| } |
| } |
| |
| ResultBuffer rb = new ResultBuffer(); |
| AnyAtomicType at = (AnyAtomicType)arg2.first(); |
| |
| get_comparable(at); |
| |
| int index = 1; |
| |
| for (Iterator i = arg1.iterator(); i.hasNext();) { |
| AnyType cmptype = (AnyType) i.next(); |
| get_comparable(cmptype); |
| |
| if (!(at instanceof CmpEq)) |
| continue; |
| |
| if (isBoolean(cmptype, at)) { |
| XSBoolean boolat = (XSBoolean) cmptype; |
| if (boolat.eq(at, dc)) { |
| rb.add(new XSInteger(BigInteger.valueOf(index))); |
| } |
| } else |
| |
| if (isNumeric(cmptype, at)) { |
| NumericType numericat = (NumericType) at; |
| if (numericat.eq(cmptype, dc)) { |
| rb.add(new XSInteger(BigInteger.valueOf(index))); |
| } |
| } else |
| |
| if (isDuration(cmptype, at)) { |
| XSDuration durat = (XSDuration) at; |
| if (durat.eq(cmptype, dc)) { |
| rb.add(new XSInteger(BigInteger.valueOf(index))); |
| } |
| } else |
| |
| if (needsStringComparison(cmptype, at)) { |
| XSString xstr1 = new XSString(cmptype.getStringValue()); |
| XSString itemStr = new XSString(at.getStringValue()); |
| if (FnCompare.compare_string(collationUri, xstr1, itemStr, dc).equals(BigInteger.ZERO)) { |
| rb.add(new XSInteger(BigInteger.valueOf(index))); |
| } |
| } |
| |
| index++; |
| } |
| |
| return rb.getSequence(); |
| } |
| |
| /** |
| * Obtain a list of expected arguments. |
| * |
| * @return Result of operation. |
| */ |
| public synchronized static Collection expected_args() { |
| if (_expected_args == null) { |
| _expected_args = new ArrayList(); |
| SeqType arg = new SeqType(AnyType.class, SeqType.OCC_STAR); |
| _expected_args.add(arg); |
| _expected_args.add(new SeqType(AnyAtomicType.class, SeqType.OCC_NONE)); |
| _expected_args.add(new SeqType(new XSString(), SeqType.OCC_NONE)); |
| _expected_args.add(arg); |
| } |
| |
| return _expected_args; |
| } |
| |
| } |