| /* SchemaFactory.java -- |
| Copyright (C) 2004, 2005, 2006 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| package javax.xml.validation; |
| |
| import java.io.BufferedReader; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| import java.io.IOException; |
| import java.net.URL; |
| import java.util.Properties; |
| import javax.xml.XMLConstants; |
| import javax.xml.transform.Source; |
| import javax.xml.transform.stream.StreamSource; |
| import org.w3c.dom.ls.LSResourceResolver; |
| import org.xml.sax.ErrorHandler; |
| import org.xml.sax.SAXException; |
| import org.xml.sax.SAXNotRecognizedException; |
| import org.xml.sax.SAXNotSupportedException; |
| |
| /** |
| * Factory for obtaining schemata. |
| * |
| * @author Chris Burdess (dog@gnu.org) |
| * @since 1.5 |
| */ |
| public abstract class SchemaFactory |
| { |
| protected SchemaFactory() |
| { |
| } |
| |
| /** |
| * Returns an implementation of <code>SchemaFactory</code> that supports |
| * the specified schema language. |
| * @param schemaLanguage the URI of a schema language (see |
| * <code>XMLConstants</code>) |
| */ |
| public static final SchemaFactory newInstance(String schemaLanguage) |
| { |
| ClassLoader loader = Thread.currentThread().getContextClassLoader(); |
| if (loader == null) |
| { |
| loader = SchemaFactory.class.getClassLoader(); |
| } |
| final String factoryClassName = "javax.xml.validation.SchemaFactory"; |
| String className = null; |
| int count = 0; |
| do |
| { |
| className = getFactoryClassName(loader, schemaLanguage, count++); |
| if (className != null) |
| { |
| try |
| { |
| Class<?> t = (loader != null) ? loader.loadClass(className) : |
| Class.forName(className); |
| return (SchemaFactory) t.newInstance(); |
| } |
| catch (Exception e) |
| { |
| // Ignore any errors and continue algorithm. |
| // This method doesn't have a means of propagating |
| // class instantiation errors. |
| className = null; |
| } |
| } |
| } |
| while (className == null && count < 2); |
| try |
| { |
| String serviceKey = "/META-INF/services/" + factoryClassName; |
| InputStream in = (loader != null) ? |
| loader.getResourceAsStream(serviceKey) : |
| SchemaFactory.class.getResourceAsStream(serviceKey); |
| if (in != null) |
| { |
| BufferedReader r = |
| new BufferedReader(new InputStreamReader(in)); |
| try |
| { |
| for (String line = r.readLine(); line != null; |
| line = r.readLine()) |
| { |
| Class<?> t = (loader != null) ? loader.loadClass(className) : |
| Class.forName(className); |
| SchemaFactory ret = (SchemaFactory) t.newInstance(); |
| if (ret.isSchemaLanguageSupported(schemaLanguage)) |
| return ret; |
| } |
| } |
| catch (Exception e) |
| { |
| // Fall through. See above. |
| } |
| finally |
| { |
| r.close(); |
| } |
| } |
| } |
| catch (IOException e) |
| { |
| } |
| // Default schema factories for Classpath |
| if (XMLConstants.W3C_XML_SCHEMA_NS_URI.equals(schemaLanguage)) |
| return new gnu.xml.validation.xmlschema.XMLSchemaSchemaFactory(); |
| if (XMLConstants.RELAXNG_NS_URI.equals(schemaLanguage)) |
| return new gnu.xml.validation.relaxng.RELAXNGSchemaFactory(); |
| throw new IllegalArgumentException(schemaLanguage); |
| } |
| |
| private static String getFactoryClassName(ClassLoader loader, |
| String schemaLanguage, int attempt) |
| { |
| final String factoryClassName = "javax.xml.validation.SchemaFactory"; |
| final String propertyName = factoryClassName + ":" + schemaLanguage; |
| switch (attempt) |
| { |
| case 0: |
| return System.getProperty(propertyName); |
| case 1: |
| try |
| { |
| File file = new File(System.getProperty("java.home")); |
| file = new File(file, "lib"); |
| file = new File(file, "jaxp.properties"); |
| InputStream in = new FileInputStream(file); |
| Properties props = new Properties(); |
| props.load(in); |
| in.close(); |
| return props.getProperty(propertyName); |
| } |
| catch (IOException e) |
| { |
| return null; |
| } |
| default: |
| return null; |
| } |
| } |
| |
| /** |
| * Indicates whether the specified schema language is supported. |
| * @param schemaLanguage the URI of a schema language (see |
| * <code>XMLConstants</code>) |
| */ |
| public abstract boolean isSchemaLanguageSupported(String schemaLanguage); |
| |
| public boolean getFeature(String name) |
| throws SAXNotRecognizedException, SAXNotSupportedException |
| { |
| throw new SAXNotRecognizedException(name); |
| } |
| |
| public void setFeature(String name, boolean value) |
| throws SAXNotRecognizedException, SAXNotSupportedException |
| { |
| throw new SAXNotRecognizedException(name); |
| } |
| |
| public Object getProperty(String name) |
| throws SAXNotRecognizedException, SAXNotSupportedException |
| { |
| throw new SAXNotRecognizedException(name); |
| } |
| |
| public void setProperty(String name, Object value) |
| throws SAXNotRecognizedException, SAXNotSupportedException |
| { |
| throw new SAXNotRecognizedException(name); |
| } |
| |
| public abstract ErrorHandler getErrorHandler(); |
| |
| public abstract void setErrorHandler(ErrorHandler errorHandler); |
| |
| public abstract LSResourceResolver getResourceResolver(); |
| |
| public abstract void setResourceResolver(LSResourceResolver resourceResolver); |
| |
| /** |
| * Returns a schema based on the specified source resource. |
| * @param schema the source resource |
| */ |
| public Schema newSchema(Source schema) |
| throws SAXException |
| { |
| return newSchema(new Source[] { schema }); |
| } |
| |
| /** |
| * Returns a schema based on the specified source file. |
| * @param schema the source resource |
| */ |
| public Schema newSchema(File schema) |
| throws SAXException |
| { |
| return newSchema(new StreamSource(schema)); |
| } |
| |
| /** |
| * Returns a schema based on the specified URL. |
| * @param schema the source resource |
| */ |
| public Schema newSchema(URL schema) |
| throws SAXException |
| { |
| return newSchema(new StreamSource(schema.toString())); |
| } |
| |
| /** |
| * Parses the specified sources, and combine them into a single schema. |
| * The exact procedure and semantics of this depends on the schema |
| * language. |
| * @param schemata the schema resources to load |
| */ |
| public abstract Schema newSchema(Source[] schemata) |
| throws SAXException; |
| |
| /** |
| * Creates a special schema. |
| * The exact semantics of this depends on the schema language. |
| */ |
| public abstract Schema newSchema() |
| throws SAXException; |
| |
| } |