| package org.apache.ddlutils.io; |
| |
| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| import java.io.FileInputStream; |
| import java.io.InputStream; |
| import java.net.URL; |
| |
| import org.xml.sax.EntityResolver; |
| import org.xml.sax.InputSource; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * An entity resolver that matches the specific database dtds to the one that comes |
| * with DdlUtils, and that can handle file url's. |
| * |
| * @version $Revision$ |
| */ |
| public class LocalEntityResolver implements EntityResolver |
| { |
| /** The default DTD. */ |
| public static final String DTD_PREFIX = "http://db.apache.org/torque/dtd/database"; |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public InputSource resolveEntity(String publicId, String systemId) throws SAXException |
| { |
| InputSource result = null; |
| |
| if (systemId.startsWith(DTD_PREFIX)) |
| { |
| InputStream input = getClass().getResourceAsStream("/database.dtd"); |
| |
| if (input != null) |
| { |
| result = new InputSource(input); |
| } |
| } |
| else if (systemId.startsWith("file:")) |
| { |
| try |
| { |
| URL url = new URL(systemId); |
| |
| if ("file".equals(url.getProtocol())) |
| { |
| String path = systemId.substring("file:".length()); |
| |
| if (path.startsWith("//")) |
| { |
| path = path.substring(2); |
| } |
| result = new InputSource(new FileInputStream(path)); |
| } |
| else |
| { |
| result = new InputSource(url.openStream()); |
| } |
| } |
| catch (Exception ex) |
| { |
| throw new SAXException(ex); |
| } |
| } |
| return result; |
| } |
| } |