| /* |
| * 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.server.core.partition.impl.btree.mavibot; |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutput; |
| import java.io.ObjectOutputStream; |
| import java.nio.ByteBuffer; |
| import java.util.Comparator; |
| |
| import org.apache.directory.api.ldap.model.name.Rdn; |
| import org.apache.directory.api.ldap.model.schema.SchemaManager; |
| import org.apache.directory.server.i18n.I18n; |
| import org.apache.directory.server.xdbm.ParentIdAndRdn; |
| import org.apache.mavibot.btree.serializer.BufferHandler; |
| import org.apache.mavibot.btree.serializer.ElementSerializer; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| |
| /** |
| * Serialize and deserialize a ParentidAndRdn. |
| * </br></br> |
| * <b>This class must *not* be used outside of the server.</b> |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| */ |
| public class MavibotParentIdAndRdnSerializer implements ElementSerializer<ParentIdAndRdn> |
| { |
| /** The serialVersionUID */ |
| private static final long serialVersionUID = 1L; |
| |
| /** the logger for this class */ |
| private static final Logger LOG = LoggerFactory.getLogger( MavibotParentIdAndRdnSerializer.class ); |
| |
| /** |
| * Speedup for logs |
| */ |
| private static final boolean IS_DEBUG = LOG.isDebugEnabled(); |
| |
| /** The schemaManager reference */ |
| private static SchemaManager schemaManager; |
| |
| private Comparator<ParentIdAndRdn> comparator = new Comparator<ParentIdAndRdn>() |
| { |
| |
| @Override |
| public int compare( ParentIdAndRdn rdn1, ParentIdAndRdn rdn2 ) |
| { |
| return rdn1.compareTo( rdn2 ); |
| } |
| |
| }; |
| |
| /** |
| * Creates a new instance of ParentIdAndRdnSerializer. |
| * The schemaManager MUST be set explicitly using the static {@link #setSchemaManager(SchemaManager)} |
| */ |
| public MavibotParentIdAndRdnSerializer() |
| { |
| } |
| |
| |
| /** |
| * <p> |
| * |
| * This is the place where we serialize ParentIdAndRdn |
| * <p> |
| */ |
| public byte[] serialize( ParentIdAndRdn parentIdAndRdn ) |
| { |
| try |
| { |
| ByteArrayOutputStream baos = new ByteArrayOutputStream(); |
| |
| int totalBytes = 0; |
| // write dummy length for preserving the space for 'length' to be filled later |
| baos.write( 0 ); |
| baos.write( 0 ); |
| baos.write( 0 ); |
| baos.write( 0 ); |
| |
| ObjectOutput out = new ObjectOutputStream( baos ); |
| |
| |
| // First, the Dn |
| Rdn[] rdns = parentIdAndRdn.getRdns(); |
| |
| // Write the Rdn of the Dn |
| if ( ( rdns == null ) || ( rdns.length == 0 ) ) |
| { |
| out.writeByte( 0 ); |
| } |
| else |
| { |
| out.writeByte( rdns.length ); |
| |
| for ( Rdn rdn : rdns ) |
| { |
| rdn.writeExternal( out ); |
| } |
| } |
| |
| // Then the parentId. |
| out.writeUTF( parentIdAndRdn.getParentId() ); |
| |
| // The number of children |
| out.writeInt( parentIdAndRdn.getNbChildren() ); |
| |
| // The number of descendants |
| out.writeInt( parentIdAndRdn.getNbDescendants() ); |
| |
| out.flush(); |
| |
| if ( IS_DEBUG ) |
| { |
| LOG.debug( ">------------------------------------------------" ); |
| LOG.debug( "Serialize " + parentIdAndRdn ); |
| } |
| |
| byte[] bytes = baos.toByteArray(); |
| |
| totalBytes = bytes.length - 4; //subtract the first 4 dummy bytes |
| |
| // replace the dummy length with the actual length |
| bytes[0] = ( byte ) ( totalBytes >>> 24 ); |
| bytes[1] = ( byte ) ( totalBytes >>> 16 ); |
| bytes[2] = ( byte ) ( totalBytes >>> 8 ); |
| bytes[3] = ( byte ) ( totalBytes ); |
| |
| return bytes; |
| } |
| catch( Exception e ) |
| { |
| throw new RuntimeException( e ); |
| } |
| } |
| |
| |
| /** |
| * Deserialize a ParentIdAndRdn. |
| * |
| * @param bytes the byte array containing the serialized ParentIdAndRdn |
| * @return An instance of a ParentIdAndRdn object |
| * @throws IOException if we can't deserialize the ParentIdAndRdn |
| */ |
| public ParentIdAndRdn deserialize( BufferHandler bufferHandler ) throws IOException |
| { |
| return deserialize( ByteBuffer.wrap( bufferHandler.getBuffer() ) ); |
| } |
| |
| |
| @Override |
| public ParentIdAndRdn deserialize( ByteBuffer buffer ) throws IOException |
| { |
| int len = buffer.getInt(); |
| |
| ObjectInputStream in = new ObjectInputStream( new ByteArrayInputStream( buffer.array(), buffer.position(), len ) ); |
| |
| try |
| { |
| ParentIdAndRdn parentIdAndRdn = new ParentIdAndRdn(); |
| |
| // Read the number of rdns, if any |
| byte nbRdns = in.readByte(); |
| |
| if ( nbRdns == 0 ) |
| { |
| parentIdAndRdn.setRdns( new Rdn[0] ); |
| } |
| else |
| { |
| Rdn[] rdns = new Rdn[nbRdns]; |
| |
| for ( int i = 0; i < nbRdns; i++ ) |
| { |
| Rdn rdn = new Rdn( schemaManager ); |
| rdn.readExternal( in ); |
| rdns[i] = rdn; |
| } |
| |
| parentIdAndRdn.setRdns( rdns ); |
| } |
| |
| // Read the parent ID |
| String uuid = in.readUTF(); |
| |
| parentIdAndRdn.setParentId( uuid ); |
| |
| // Read the nulber of children and descendants |
| int nbChildren = in.readInt(); |
| int nbDescendants = in.readInt(); |
| |
| parentIdAndRdn.setNbChildren( nbChildren ); |
| parentIdAndRdn.setNbDescendants( nbDescendants ); |
| |
| buffer.position( buffer.position() + len ); |
| |
| return parentIdAndRdn; |
| } |
| catch ( ClassNotFoundException cnfe ) |
| { |
| LOG.error( I18n.err( I18n.ERR_134, cnfe.getLocalizedMessage() ) ); |
| throw new IOException( cnfe.getLocalizedMessage() ); |
| } |
| } |
| |
| |
| @Override |
| public int compare( ParentIdAndRdn type1, ParentIdAndRdn type2 ) |
| { |
| return type1.compareTo( type2 ); |
| } |
| |
| |
| @Override |
| public Comparator<ParentIdAndRdn> getComparator() |
| { |
| return comparator; |
| } |
| |
| public static void setSchemaManager( SchemaManager schemaManager ) |
| { |
| MavibotParentIdAndRdnSerializer.schemaManager = schemaManager; |
| } |
| |
| } |