| /* |
| * The Apache Software License, Version 1.1 |
| * |
| * |
| * Copyright (c) 1999-2003 The Apache Software Foundation. All rights |
| * reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * 3. The end-user documentation included with the redistribution, |
| * if any, must include the following acknowledgment: |
| * "This product includes software developed by the |
| * Apache Software Foundation (http://www.apache.org/)." |
| * Alternately, this acknowledgment may appear in the software itself, |
| * if and wherever such third-party acknowledgments normally appear. |
| * |
| * 4. The names "Xalan" and "Apache Software Foundation" must |
| * not be used to endorse or promote products derived from this |
| * software without prior written permission. For written |
| * permission, please contact apache@apache.org. |
| * |
| * 5. Products derived from this software may not be called "Apache", |
| * nor may "Apache" appear in their name, without prior written |
| * permission of the Apache Software Foundation. |
| * |
| * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED |
| * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| * DISCLAIMED. IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR |
| * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF |
| * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
| * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * ==================================================================== |
| * |
| * This software consists of voluntary contributions made by many |
| * individuals on behalf of the Apache Software Foundation and was |
| * originally based on software copyright (c) 1999, Lotus |
| * Development Corporation., http://www.lotus.com. For more |
| * information on the Apache Software Foundation, please see |
| * <http://www.apache.org/>. |
| */ |
| package org.apache.xpath.functions; |
| |
| import java.util.Vector; |
| |
| import java.io.StringWriter; |
| import java.io.PrintWriter; |
| import java.io.IOException; |
| |
| import org.apache.xml.dtm.DTM; |
| import org.apache.xml.dtm.DTMIterator; |
| import org.apache.xml.dtm.DTMManager; |
| import org.apache.xml.dtm.XType; |
| |
| import org.apache.xpath.NodeSetDTM; |
| import org.apache.xpath.functions.Function; |
| import org.apache.xpath.functions.Function2Args; |
| import org.apache.xpath.functions.WrongNumberArgsException; |
| import org.apache.xpath.objects.XObject; |
| import org.apache.xpath.objects.XNodeSet; |
| import org.apache.xpath.objects.XSequence; |
| import org.apache.xpath.objects.XNodeSequenceSingleton; |
| import org.apache.xpath.XPath; |
| import org.apache.xpath.XPathContext; |
| import org.apache.xpath.SourceTreeManager; |
| import org.apache.xpath.Expression; |
| import org.apache.xalan.res.XSLMessages; |
| import org.apache.xpath.res.XPATHErrorResources; |
| import org.apache.xalan.transformer.TransformerImpl; |
| |
| import org.xml.sax.InputSource; |
| import org.xml.sax.Locator; |
| |
| import javax.xml.transform.TransformerException; |
| import javax.xml.transform.SourceLocator; |
| import javax.xml.transform.ErrorListener; |
| import javax.xml.transform.Source; |
| |
| import org.apache.xml.utils.SAXSourceLocator; |
| import org.apache.xml.utils.XMLString; |
| |
| /** |
| * <meta name="usage" content="advanced"/> |
| * Execute the Doc() function. |
| * |
| * When the document function has exactly one argument and the argument |
| * is a node-set, then the result is the union, for each node in the |
| * argument node-set, of the result of calling the document function with |
| * the first argument being the string-value of the node, and the second |
| * argument being a node-set with the node as its only member. When the |
| * document function has two arguments and the first argument is a node-set, |
| * then the result is the union, for each node in the argument node-set, |
| * of the result of calling the document function with the first argument |
| * being the string-value of the node, and with the second argument being |
| * the second argument passed to the document function. |
| */ |
| public class FuncCollection extends FunctionOneArg |
| { |
| |
| /** |
| * Execute the function. The function must return |
| * a valid object. |
| * @param xctxt The current execution context. |
| * @return A valid XObject. |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| public XObject execute(XPathContext xctxt) throws javax.xml.transform.TransformerException |
| { |
| int context = xctxt.getCurrentNode(); |
| DTM dtm = xctxt.getDTM(context); |
| |
| int docContext = dtm.getDocumentRoot(context); |
| |
| // The URI reference must be an absolute URI. |
| String base = this.getArg0().execute(xctxt).str(); |
| |
| if (DTM.NULL == docContext) |
| { |
| error(xctxt, XPATHErrorResources.ER_CONTEXT_HAS_NO_OWNERDOC, null); //"context does not have an owner document!"); |
| } |
| |
| XNodeSet nodes = new XNodeSet(xctxt.getDTMManager()); |
| NodeSetDTM mnl = nodes.mutableNodeset(); |
| |
| int newDoc = getDoc(xctxt, context, base); |
| |
| if (DTM.NULL != newDoc) |
| { |
| // TODO: mnl.addNodeInDocOrder(newDoc, true, xctxt); ?? |
| if (!mnl.contains(newDoc)) |
| { |
| mnl.addElement(newDoc); |
| } |
| } |
| |
| if (mnl.getLength() == 0) |
| return XSequence.EMPTY; |
| else |
| return nodes; |
| } |
| |
| /** |
| * Get the document from the given URI and base |
| * |
| * @param xctxt The XPath runtime state. |
| * @param context The current context node |
| * @param uri URI of the document |
| * |
| * @return The document Node pointing to the document at the given URI |
| * or null |
| * |
| * @throws javax.xml.transform.TransformerException |
| */ |
| int getDoc(XPathContext xctxt, int context, String uri) |
| throws javax.xml.transform.TransformerException |
| { |
| |
| SourceTreeManager treeMgr = xctxt.getSourceTreeManager(); |
| Source source; |
| |
| int newDoc; |
| try |
| { |
| source = treeMgr.resolveURI(null, uri, xctxt.getSAXLocator()); |
| newDoc = treeMgr.getNode(source); |
| } |
| catch (IOException ioe) |
| { |
| throw new TransformerException(ioe.getMessage(), |
| (SourceLocator)xctxt.getSAXLocator(), ioe); |
| } |
| |
| if (DTM.NULL != newDoc) |
| return newDoc; |
| |
| String diagnosticsString = null; |
| |
| try |
| { |
| if ((null != uri) && (uri.toString().length() > 0)) |
| { |
| newDoc = treeMgr.getSourceTree(source, xctxt.getSAXLocator(), xctxt); |
| |
| } |
| else |
| warn(xctxt, XPATHErrorResources.WG_CANNOT_MAKE_URL_FROM, |
| new Object[]{ uri }); //"Can not make URL from: "+((base == null) ? "" : base )+uri); |
| } |
| catch (Throwable throwable) |
| { |
| |
| newDoc = DTM.NULL; |
| |
| while (throwable |
| instanceof org.apache.xml.utils.WrappedRuntimeException) |
| { |
| throwable = |
| ((org.apache.xml.utils.WrappedRuntimeException) throwable).getException(); |
| } |
| |
| if ((throwable instanceof NullPointerException) |
| || (throwable instanceof ClassCastException)) |
| { |
| throw new org.apache.xml.utils.WrappedRuntimeException( |
| (Exception) throwable); |
| } |
| |
| StringWriter sw = new StringWriter(); |
| PrintWriter diagnosticsWriter = new PrintWriter(sw); |
| |
| if (throwable instanceof TransformerException) |
| { |
| TransformerException spe = (TransformerException) throwable; |
| |
| { |
| Throwable e = spe; |
| |
| while (null != e) |
| { |
| if (null != e.getMessage()) |
| { |
| diagnosticsWriter.println(" (" + e.getClass().getName() + "): " |
| + e.getMessage()); |
| } |
| |
| if (e instanceof TransformerException) |
| { |
| TransformerException spe2 = (TransformerException) e; |
| |
| SourceLocator locator = spe2.getLocator(); |
| if ((null != locator) && (null != locator.getSystemId())) |
| diagnosticsWriter.println(" ID: " + locator.getSystemId() |
| + " Line #" + locator.getLineNumber() |
| + " Column #" |
| + locator.getColumnNumber()); |
| |
| e = spe2.getException(); |
| |
| if (e instanceof org.apache.xml.utils.WrappedRuntimeException) |
| e = ((org.apache.xml.utils.WrappedRuntimeException) e).getException(); |
| } |
| else |
| e = null; |
| } |
| } |
| } |
| else |
| { |
| diagnosticsWriter.println(" (" + throwable.getClass().getName() |
| + "): " + throwable.getMessage()); |
| } |
| |
| diagnosticsString = throwable.getMessage(); //sw.toString(); |
| } |
| |
| if (DTM.NULL == newDoc) |
| { |
| |
| if (null != diagnosticsString) |
| { |
| error(xctxt, XPATHErrorResources.ER_INVALID_ARG_TO_COLLECTION, |
| new Object[]{ diagnosticsString }); //"Can not load requested doc: "+((base == null) ? "" : base )+uri); |
| } |
| else |
| error(xctxt, XPATHErrorResources.ER_INVALID_ARG_TO_COLLECTION, |
| new Object[]{ |
| uri == null |
| ? uri : uri.toString() }); //"Can not load requested doc: "+((base == null) ? "" : base )+uri); |
| } |
| |
| return newDoc; |
| } |
| |
| /** |
| * Tell if the expression is a nodeset expression. In other words, tell |
| * if you can execute {@link asNode() asNode} without an exception. |
| * @return true if the expression can be represented as a nodeset. |
| */ |
| public boolean isNodesetExpr() |
| { |
| return true; |
| } |
| |
| } |
