| /* |
| * 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. |
| * |
| */ |
| |
| package org.apache.directory.shared.ldap.sp; |
| |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.Serializable; |
| import java.net.URL; |
| |
| import javax.naming.NamingException; |
| import javax.naming.directory.Attributes; |
| import javax.naming.directory.BasicAttributes; |
| import javax.naming.ldap.ExtendedResponse; |
| import javax.naming.ldap.LdapContext; |
| |
| import org.apache.commons.lang.SerializationUtils; |
| import org.apache.directory.shared.ldap.model.constants.SchemaConstants; |
| import org.apache.directory.shared.ldap.extras.extended.StoredProcedureRequest; |
| import org.apache.directory.shared.ldap.util.JndiUtils; |
| |
| |
| /** |
| * A utility class for working with Java Stored Procedures at the base level. |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public final class JavaStoredProcUtils |
| { |
| |
| /** |
| * Private constructor. |
| */ |
| private JavaStoredProcUtils() |
| { |
| } |
| |
| |
| /** |
| * Returns the stream data of a Java class. |
| * |
| * @param clazz |
| * The class whose stream data will be retrieved. |
| * @return |
| * Stream data of the class file as a byte array. |
| * @throws NamingException |
| * If an IO error occurs during reading the class file. |
| */ |
| public static byte[] getClassFileAsStream( Class<?> clazz ) throws NamingException |
| { |
| String fullClassName = clazz.getName(); |
| int lastDot = fullClassName.lastIndexOf( '.' ); |
| String classFileName = fullClassName.substring( lastDot + 1 ) + ".class"; |
| URL url = clazz.getResource( classFileName ); |
| InputStream in = clazz.getResourceAsStream( classFileName ); |
| File file = new File( url.getFile() ); |
| int size = ( int ) file.length(); |
| byte[] buf = new byte[size]; |
| |
| try |
| { |
| in.read( buf ); |
| in.close(); |
| } |
| catch ( IOException e ) |
| { |
| NamingException ne = new NamingException(); |
| ne.setRootCause( e ); |
| throw ne; |
| } |
| |
| return buf; |
| } |
| |
| |
| /** |
| * Loads a Java class's stream data as a subcontext of an LdapContext given. |
| * |
| * @param ctx |
| * The parent context of the Java class entry to be loaded. |
| * @param clazz |
| * Class to be loaded. |
| * @throws NamingException |
| * If an error occurs during creating the subcontext. |
| */ |
| public static void loadStoredProcedureClass( LdapContext ctx, Class<?> clazz ) throws NamingException |
| { |
| byte[] buf = getClassFileAsStream( clazz ); |
| String fullClassName = clazz.getName(); |
| |
| Attributes attributes = new BasicAttributes( SchemaConstants.OBJECT_CLASS_AT, SchemaConstants.TOP_OC, true ); |
| attributes.get( SchemaConstants.OBJECT_CLASS_AT ).add( "storedProcUnit" ); |
| attributes.get( SchemaConstants.OBJECT_CLASS_AT ).add( "javaStoredProcUnit" ); |
| attributes.put( "storedProcLangId", "Java" ); |
| attributes.put( "storedProcUnitName", fullClassName ); |
| attributes.put( "javaByteCode", buf ); |
| |
| ctx.createSubcontext( "storedProcUnitName=" + fullClassName, attributes ); |
| } |
| |
| |
| public static Object callStoredProcedure( LdapContext ctx, String procedureName, Object[] arguments ) |
| throws NamingException |
| { |
| String language = "Java"; |
| |
| Object responseObject; |
| try |
| { |
| /** |
| * Create a new stored procedure execution request. |
| */ |
| StoredProcedureRequest req = new StoredProcedureRequest( 0, procedureName, language ); |
| |
| /** |
| * For each argument UTF-8-encode the type name |
| * and Java-serialize the value |
| * and add them to the request as a parameter object. |
| */ |
| for ( int i = 0; i < arguments.length; i++ ) |
| { |
| byte[] type; |
| byte[] value; |
| type = arguments[i].getClass().getName().getBytes( "UTF-8" ); |
| value = SerializationUtils.serialize( ( Serializable ) arguments[i] ); |
| req.addParameter( type, value ); |
| } |
| |
| /** |
| * Call the stored procedure via the extended operation |
| * and get back its return value. |
| */ |
| ExtendedResponse resp = ctx.extendedOperation( JndiUtils.toJndiExtendedRequest( req ) ); |
| |
| /** |
| * Restore a Java object from the return value. |
| */ |
| byte[] responseStream = resp.getEncodedValue(); |
| responseObject = SerializationUtils.deserialize( responseStream ); |
| } |
| catch ( Exception e ) |
| { |
| NamingException ne = new NamingException(); |
| ne.setRootCause( e ); |
| throw ne; |
| } |
| |
| return responseObject; |
| } |
| |
| } |