| /******************************************************************************* |
| * Copyright (c) 2002-2005 IBM Corporation 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: |
| * IBM - Initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.wst.wsi.internal.core.wsdl.xsd; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Vector; |
| |
| import org.apache.xerces.xni.XMLResourceIdentifier; |
| import org.apache.xerces.xni.XNIException; |
| import org.apache.xerces.xni.parser.XMLEntityResolver; |
| import org.apache.xerces.xni.parser.XMLInputSource; |
| |
| /** |
| * Handle a chain of entity resolvers. |
| * |
| * @author Lawrence Mandel (lmandel@ca.ibm.com) |
| */ |
| public class XMLEntityResolverChain implements XMLEntityResolver |
| { |
| private List entityResolvers = new Vector(); |
| |
| /** |
| * @see org.apache.xerces.xni.parser.XMLEntityResolver#resolveEntity(org.apache.xerces.xni.XMLResourceIdentifier) |
| */ |
| public XMLInputSource resolveEntity(XMLResourceIdentifier xmlResourceIdentifier) throws XNIException, IOException |
| { |
| XMLInputSource is = null; |
| Iterator entityResolverIter = entityResolvers.iterator(); |
| while (entityResolverIter.hasNext()) |
| { |
| XMLEntityResolver entityResolver = (XMLEntityResolver)entityResolverIter.next(); |
| try |
| { |
| is = entityResolver.resolveEntity(xmlResourceIdentifier); |
| } |
| catch (XNIException e) |
| { |
| } |
| catch (IOException e) |
| { |
| } |
| if (is != null) |
| { |
| break; |
| } |
| } |
| // Throw and IOException if the file isn't found |
| if (is == null) |
| { |
| throw new IOException("Unable to locate file"); |
| } |
| return is; |
| } |
| |
| /** |
| * Add an entity resolver to this chain. |
| * |
| * @param entityResolver The resolver to add to the chain. |
| */ |
| public void addEntityResolver(XMLEntityResolver entityResolver) |
| { |
| entityResolvers.add(entityResolver); |
| } |
| } |