| /* |
| * 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.codec.compare; |
| |
| |
| import java.nio.BufferOverflowException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.directory.shared.asn1.ber.tlv.TLV; |
| import org.apache.directory.shared.asn1.ber.tlv.UniversalTag; |
| import org.apache.directory.shared.asn1.ber.tlv.Value; |
| import org.apache.directory.shared.asn1.codec.EncoderException; |
| import org.apache.directory.shared.i18n.I18n; |
| import org.apache.directory.shared.ldap.codec.LdapConstants; |
| import org.apache.directory.shared.ldap.codec.LdapMessageCodec; |
| import org.apache.directory.shared.ldap.codec.MessageTypeEnum; |
| import org.apache.directory.shared.ldap.name.DN; |
| import org.apache.directory.shared.ldap.util.StringTools; |
| |
| |
| /** |
| * A CompareRequest Message. Its syntax is : |
| * CompareRequest ::= [APPLICATION 14] SEQUENCE { |
| * entry LDAPDN, |
| * ava AttributeValueAssertion } |
| * |
| * AttributeValueAssertion ::= SEQUENCE { |
| * attributeDesc AttributeDescription, |
| * assertionValue AssertionValue } |
| * |
| * AttributeDescription ::= LDAPString |
| * |
| * AssertionValue ::= OCTET STRING |
| * |
| * @author <a href="mailto:dev@directory.apache.org">Apache Directory Project</a> |
| * @version $Rev$, $Date$, |
| */ |
| public class CompareRequestCodec extends LdapMessageCodec |
| { |
| // ~ Instance fields |
| // ---------------------------------------------------------------------------- |
| |
| /** The entry to be compared */ |
| private DN entry; |
| |
| /** The attribute to be compared */ |
| private String attributeDesc; |
| |
| /** The value to be compared */ |
| private Object assertionValue; |
| |
| /** The compare request length */ |
| private int compareRequestLength; |
| |
| /** The attribute value assertion length */ |
| private int avaLength; |
| |
| |
| // ~ Constructors |
| // ------------------------------------------------------------------------------- |
| |
| /** |
| * Creates a new CompareRequest object. |
| */ |
| public CompareRequestCodec() |
| { |
| super(); |
| } |
| |
| |
| // ~ Methods |
| // ------------------------------------------------------------------------------------ |
| |
| /** |
| * Get the message type |
| * |
| * @return Returns the type. |
| */ |
| public MessageTypeEnum getMessageType() |
| { |
| return MessageTypeEnum.COMPARE_REQUEST; |
| } |
| |
| |
| /** |
| * {@inheritDoc} |
| */ |
| public String getMessageTypeName() |
| { |
| return "COMPARE_REQUEST"; |
| } |
| |
| |
| /** |
| * Get the entry to be compared |
| * |
| * @return Returns the entry. |
| */ |
| public DN getEntry() |
| { |
| return entry; |
| } |
| |
| |
| /** |
| * Set the entry to be compared |
| * |
| * @param entry The entry to set. |
| */ |
| public void setEntry( DN entry ) |
| { |
| this.entry = entry; |
| } |
| |
| |
| /** |
| * Get the assertion value |
| * |
| * @return Returns the assertionValue. |
| */ |
| public Object getAssertionValue() |
| { |
| return assertionValue; |
| } |
| |
| |
| /** |
| * Set the assertion value |
| * |
| * @param assertionValue The assertionValue to set. |
| */ |
| public void setAssertionValue( Object assertionValue ) |
| { |
| this.assertionValue = assertionValue; |
| } |
| |
| |
| /** |
| * Get the attribute description |
| * |
| * @return Returns the attributeDesc. |
| */ |
| public String getAttributeDesc() |
| { |
| return ( ( attributeDesc == null ) ? "" : attributeDesc ); |
| } |
| |
| |
| /** |
| * Set the attribute description |
| * |
| * @param attributeDesc The attributeDesc to set. |
| */ |
| public void setAttributeDesc( String attributeDesc ) |
| { |
| this.attributeDesc = attributeDesc; |
| } |
| |
| |
| /** |
| * Compute the CompareRequest length |
| * |
| * CompareRequest : |
| * 0x6E L1 |
| * | |
| * +--> 0x04 L2 entry |
| * +--> 0x30 L3 (ava) |
| * | |
| * +--> 0x04 L4 attributeDesc |
| * +--> 0x04 L5 assertionValue |
| * |
| * L3 = Length(0x04) + Length(L4) + L4 + Length(0x04) + |
| * Length(L5) + L5 |
| * Length(CompareRequest) = Length(0x6E) + Length(L1) + L1 + |
| * Length(0x04) + Length(L2) + L2 + Length(0x30) + Length(L3) + L3 |
| * |
| * @return The CompareRequest PDU's length |
| */ |
| protected int computeLengthProtocolOp() |
| { |
| // The entry |
| compareRequestLength = 1 + TLV.getNbBytes( DN.getNbBytes( entry ) ) + DN.getNbBytes( entry ); |
| |
| // The attribute value assertion |
| int attributeDescLength = StringTools.getBytesUtf8( attributeDesc ).length; |
| avaLength = 1 + TLV.getNbBytes( attributeDescLength ) + attributeDescLength; |
| |
| if ( assertionValue instanceof String ) |
| { |
| int assertionValueLength = StringTools.getBytesUtf8( ( String ) assertionValue ).length; |
| avaLength += 1 + TLV.getNbBytes( assertionValueLength ) + assertionValueLength; |
| } |
| else |
| { |
| avaLength += 1 + TLV.getNbBytes( ( ( byte[] ) assertionValue ).length ) |
| + ( ( byte[] ) assertionValue ).length; |
| } |
| |
| compareRequestLength += 1 + TLV.getNbBytes( avaLength ) + avaLength; |
| |
| return 1 + TLV.getNbBytes( compareRequestLength ) + compareRequestLength; |
| } |
| |
| |
| /** |
| * Encode the CompareRequest message to a PDU. |
| * |
| * CompareRequest : |
| * 0x6E LL |
| * 0x04 LL entry |
| * 0x30 LL attributeValueAssertion |
| * 0x04 LL attributeDesc |
| * 0x04 LL assertionValue |
| * |
| * @param buffer The buffer where to put the PDU |
| */ |
| protected void encodeProtocolOp( ByteBuffer buffer ) throws EncoderException |
| { |
| try |
| { |
| // The CompareRequest Tag |
| buffer.put( LdapConstants.COMPARE_REQUEST_TAG ); |
| buffer.put( TLV.getBytes( compareRequestLength ) ); |
| |
| // The entry |
| Value.encode( buffer, DN.getBytes( entry ) ); |
| |
| // The attributeValueAssertion sequence Tag |
| buffer.put( UniversalTag.SEQUENCE_TAG ); |
| buffer.put( TLV.getBytes( avaLength ) ); |
| } |
| catch ( BufferOverflowException boe ) |
| { |
| throw new EncoderException( I18n.err( I18n.ERR_04005 ) ); |
| } |
| |
| // The attributeDesc |
| Value.encode( buffer, attributeDesc ); |
| |
| // The assertionValue |
| if ( assertionValue instanceof String ) |
| { |
| Value.encode( buffer, ( String ) assertionValue ); |
| } |
| else |
| { |
| Value.encode( buffer, ( byte[] ) assertionValue ); |
| } |
| } |
| |
| |
| /** |
| * Get a String representation of a Compare Request |
| * |
| * @return A Compare Request String |
| */ |
| public String toString() |
| { |
| StringBuilder sb = new StringBuilder(); |
| |
| sb.append( " Compare request\n" ); |
| sb.append( " Entry : '" ).append( entry ).append( "'\n" ); |
| sb.append( " Attribute description : '" ).append( attributeDesc ).append( "'\n" ); |
| sb.append( " Attribute value : '" ).append( StringTools.dumpObject( assertionValue ) ).append( '\'' ); |
| |
| return toString( sb.toString() ); |
| } |
| } |