| /* |
| * Copyright 2002,2004 The Apache Software Foundation. |
| * |
| * Licensed 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. |
| */ |
| package org.apache.commons.jelly.tags.validate; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.File; |
| import java.io.FileInputStream; |
| import java.io.FileNotFoundException; |
| import java.io.InputStream; |
| import java.io.IOException; |
| |
| import org.apache.commons.jelly.JellyTagException; |
| import org.apache.commons.jelly.MissingAttributeException; |
| import org.apache.commons.jelly.TagSupport; |
| import org.apache.commons.jelly.XMLOutput; |
| import org.apache.commons.jelly.util.ClassLoaderUtils; |
| import org.iso_relax.verifier.Schema; |
| import org.iso_relax.verifier.Verifier; |
| import org.iso_relax.verifier.VerifierConfigurationException; |
| import org.iso_relax.verifier.VerifierFactory; |
| import org.xml.sax.SAXException; |
| |
| /** |
| * This tag creates a new Verifier of a schema as a variable |
| * so that it can be used by a <validate> tag. |
| * |
| * @author <a href="mailto:jstrachan@apache.org">James Strachan</a> |
| * @version $Revision: 1.10 $ |
| */ |
| public class VerifierTag extends TagSupport { |
| |
| /** the variable name to export the Verifier as */ |
| private String var; |
| |
| /** The URI to load the schema from */ |
| private String uri; |
| |
| /** The file to load the schema from */ |
| private File file; |
| |
| /** The system ID to use when parsing the schema */ |
| private String systemId; |
| |
| /** The factory used to create new schema verifier objects */ |
| private VerifierFactory factory; |
| |
| // Tag interface |
| //------------------------------------------------------------------------- |
| public void doTag(final XMLOutput output) throws MissingAttributeException, JellyTagException { |
| if ( var == null ) { |
| throw new MissingAttributeException("var"); |
| } |
| |
| InputStream in = null; |
| if ( uri != null ) { |
| in = context.getResourceAsStream( uri ); |
| if ( in == null ) { |
| throw new JellyTagException( "Could not find resource for uri: " + uri ); |
| } |
| } else if (file != null) { |
| try { |
| in = new FileInputStream(file); |
| } catch (FileNotFoundException e) { |
| throw new JellyTagException(e); |
| } |
| } else { |
| String text = getBodyText(); |
| in = new ByteArrayInputStream( text.getBytes() ); |
| } |
| |
| Verifier verifier = null; |
| try { |
| Schema schema = null; |
| if (systemId != null) { |
| schema = getFactory().compileSchema(in, systemId); |
| } |
| else if ( uri != null ) { |
| schema = getFactory().compileSchema(in, uri); |
| } |
| else{ |
| schema = getFactory().compileSchema(in); |
| } |
| |
| if ( schema == null ) { |
| throw new JellyTagException( "Could not create a valid schema" ); |
| } |
| |
| verifier = schema.newVerifier(); |
| } |
| catch (VerifierConfigurationException e) { |
| throw new JellyTagException(e); |
| } |
| catch (SAXException e) { |
| throw new JellyTagException(e); |
| } |
| catch (IOException e) { |
| throw new JellyTagException(e); |
| } |
| |
| context.setVariable(var, verifier); |
| } |
| |
| // Properties |
| //------------------------------------------------------------------------- |
| |
| /** |
| * Sets the name of the variable that will be set to the new Verifier |
| * |
| * @jelly:required |
| */ |
| public void setVar(String var) { |
| this.var = var; |
| } |
| |
| /** |
| * Sets the URI of the schema file to parse. If no URI and no file is |
| * specified then the body of this tag is used as the source of the schema |
| * |
| * @jelly:optional |
| */ |
| public void setUri(String uri) { |
| this.uri = uri; |
| } |
| |
| /** |
| * Sets the {@link File} of the schema to parse. If no URI and no file is |
| * specified then the body of this tag is used as the source of the schema |
| * |
| * @jelly:optional |
| */ |
| public void setFile(File aFile) { |
| file = aFile; |
| } |
| |
| /** |
| * Sets the system ID used when parsing the schema |
| * |
| * @jelly:optional |
| */ |
| public void setSystemId(String systemId) { |
| this.systemId = systemId; |
| } |
| |
| /** |
| * Sets the factory used to create new schema verifier objects. |
| * If none is provided then the default MSV factory is used. |
| * |
| * @jelly:optional |
| */ |
| public void setFactory(VerifierFactory factory) { |
| this.factory = factory; |
| } |
| |
| public VerifierFactory getFactory() throws JellyTagException { |
| if ( factory == null ) { |
| try { |
| ClassLoader loader = ClassLoaderUtils.getClassLoader(null, true, getClass()); |
| factory = (VerifierFactory)loader.loadClass( |
| "com.sun.msv.verifier.jarv.TheFactoryImpl").newInstance(); |
| } catch (ClassNotFoundException e) { |
| throw new JellyTagException(e); |
| } catch (InstantiationException e) { |
| throw new JellyTagException(e); |
| } catch (IllegalAccessException e) { |
| throw new JellyTagException(e); |
| } |
| } |
| return factory; |
| } |
| |
| // Implementation methods |
| //------------------------------------------------------------------------- |
| |
| |
| } |