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* with the License.
*
* You can obtain a copy of the license at
* trunk/opends/resource/legal-notices/OpenDS.LICENSE
* or https://OpenDS.dev.java.net/OpenDS.LICENSE.
* See the License for the specific language governing permissions
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*
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* trunk/opends/resource/legal-notices/OpenDS.LICENSE. If applicable,
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* Copyright 2006-2008 Sun Microsystems, Inc.
* Portions Copyright 2012 ForgeRock AS
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package org.opends.server.schema;
import java.util.List;
import org.opends.server.admin.server.ConfigurationChangeListener;
import org.opends.server.admin.std.server.JPEGAttributeSyntaxCfg;
import org.opends.server.api.ApproximateMatchingRule;
import org.opends.server.api.AttributeSyntax;
import org.opends.server.api.EqualityMatchingRule;
import org.opends.server.api.OrderingMatchingRule;
import org.opends.server.api.SubstringMatchingRule;
import org.opends.server.config.ConfigException;
import org.opends.server.core.DirectoryServer;
import org.opends.server.types.ByteSequence;
import org.opends.server.types.ConfigChangeResult;
import org.opends.server.types.ResultCode;
import static org.opends.server.loggers.ErrorLogger.*;
import static org.opends.messages.SchemaMessages.*;
import org.opends.messages.Message;
import org.opends.messages.MessageBuilder;
import static org.opends.server.schema.SchemaConstants.*;
/**
* This class implements the JPEG attribute syntax. This is actually
* two specifications - JPEG and JFIF. As an extension we allow JPEG
* and Exif, which is what most digital cameras use. We only check for
* valid JFIF and Exif headers.
*/
public class JPEGSyntax
extends AttributeSyntax<JPEGAttributeSyntaxCfg>
implements ConfigurationChangeListener<JPEGAttributeSyntaxCfg>
{
// The default equality matching rule for this syntax.
private EqualityMatchingRule defaultEqualityMatchingRule;
// The default ordering matching rule for this syntax.
private OrderingMatchingRule defaultOrderingMatchingRule;
// The default substring matching rule for this syntax.
private SubstringMatchingRule defaultSubstringMatchingRule;
// The current configuration for this JPEG syntax.
private volatile JPEGAttributeSyntaxCfg config;
/**
* Creates a new instance of this syntax. Note that the only thing that
* should be done here is to invoke the default constructor for the
* superclass. All initialization should be performed in the
* <CODE>initializeSyntax</CODE> method.
*/
public JPEGSyntax()
{
super();
}
/**
* {@inheritDoc}
*/
public void initializeSyntax(JPEGAttributeSyntaxCfg configuration)
throws ConfigException
{
defaultEqualityMatchingRule =
DirectoryServer.getEqualityMatchingRule(EMR_OCTET_STRING_OID);
if (defaultEqualityMatchingRule == null)
{
logError(ERR_ATTR_SYNTAX_UNKNOWN_EQUALITY_MATCHING_RULE.get(
EMR_OCTET_STRING_OID, SYNTAX_JPEG_NAME));
}
defaultOrderingMatchingRule =
DirectoryServer.getOrderingMatchingRule(OMR_OCTET_STRING_OID);
if (defaultOrderingMatchingRule == null)
{
logError(ERR_ATTR_SYNTAX_UNKNOWN_ORDERING_MATCHING_RULE.get(
OMR_OCTET_STRING_OID, SYNTAX_JPEG_NAME));
}
defaultSubstringMatchingRule =
DirectoryServer.getSubstringMatchingRule(SMR_OCTET_STRING_OID);
if (defaultSubstringMatchingRule == null)
{
logError(ERR_ATTR_SYNTAX_UNKNOWN_SUBSTRING_MATCHING_RULE.get(
SMR_OCTET_STRING_OID, SYNTAX_JPEG_NAME));
}
this.config = configuration;
config.addJPEGChangeListener(this);
}
/**
* Retrieves the common name for this attribute syntax.
*
* @return The common name for this attribute syntax.
*/
public String getSyntaxName()
{
return SYNTAX_JPEG_NAME;
}
/**
* Retrieves the OID for this attribute syntax.
*
* @return The OID for this attribute syntax.
*/
public String getOID()
{
return SYNTAX_JPEG_OID;
}
/**
* Retrieves a description for this attribute syntax.
*
* @return A description for this attribute syntax.
*/
public String getDescription()
{
return SYNTAX_JPEG_DESCRIPTION;
}
/**
* Retrieves the default equality matching rule that will be used for
* attributes with this syntax.
*
* @return The default equality matching rule that will be used for
* attributes with this syntax, or <CODE>null</CODE> if equality
* matches will not be allowed for this type by default.
*/
public EqualityMatchingRule getEqualityMatchingRule()
{
return defaultEqualityMatchingRule;
}
/**
* Retrieves the default ordering matching rule that will be used for
* attributes with this syntax.
*
* @return The default ordering matching rule that will be used for
* attributes with this syntax, or <CODE>null</CODE> if ordering
* matches will not be allowed for this type by default.
*/
public OrderingMatchingRule getOrderingMatchingRule()
{
return defaultOrderingMatchingRule;
}
/**
* Retrieves the default substring matching rule that will be used for
* attributes with this syntax.
*
* @return The default substring matching rule that will be used for
* attributes with this syntax, or <CODE>null</CODE> if substring
* matches will not be allowed for this type by default.
*/
public SubstringMatchingRule getSubstringMatchingRule()
{
return defaultSubstringMatchingRule;
}
/**
* Retrieves the default approximate matching rule that will be used for
* attributes with this syntax.
*
* @return The default approximate matching rule that will be used for
* attributes with this syntax, or <CODE>null</CODE> if approximate
* matches will not be allowed for this type by default.
*/
public ApproximateMatchingRule getApproximateMatchingRule()
{
// There is no approximate matching rule by default.
return null;
}
/**
* Indicates whether the provided value is acceptable for use in an attribute
* with this syntax. If it is not, then the reason may be appended to the
* provided buffer.
*
* @param value The value for which to make the determination.
* @param invalidReason The buffer to which the invalid reason should be
* appended.
*
* @return <CODE>true</CODE> if the provided value is acceptable for use with
* this syntax, or <CODE>false</CODE> if not.
*/
public boolean valueIsAcceptable(ByteSequence value,
MessageBuilder invalidReason)
{
// anything is acceptable if we're not strict.
if (!config.isStrictFormat())
return true;
/* JFIF files start:
* 0xff 0xd8 0xff 0xe0 LH LL 0x4a 0x46 0x49 0x46 ...
* SOI APP0 len "JFIF"
*
* Exif files (from most digital cameras) start:
* 0xff 0xd8 0xff 0xe1 LH LL 0x45 0x78 0x69 0x66 ...
* SOI APP1 len "Exif"
*
* So all legal values must be at least 10 bytes long
*/
if (value.length() < 10)
return false;
if (value.byteAt(0) != (byte)0xff && value.byteAt(1) != (byte)0xd8)
return false;
if (value.byteAt(2) == (byte)0xff && value.byteAt(3) == (byte)0xe0 &&
value.byteAt(6) == 'J' && value.byteAt(7) == 'F' &&
value.byteAt(8) == 'I' && value.byteAt(9) == 'F')
return true;
if (value.byteAt(2) == (byte)0xff && value.byteAt(3) == (byte)0xe1 &&
value.byteAt(6) == 'E' && value.byteAt(7) == 'x' &&
value.byteAt(8) == 'i' && value.byteAt(9) == 'f')
return true;
// No JFIF or Exif header found
return false;
}
/**
* {@inheritDoc}
*/
public boolean isConfigurationChangeAcceptable(
JPEGAttributeSyntaxCfg configuration,
List<Message> unacceptableReasons)
{
// The configuration will always be acceptable.
return true;
}
/**
* {@inheritDoc}
*/
public ConfigChangeResult applyConfigurationChange(
JPEGAttributeSyntaxCfg configuration)
{
this.config = configuration;
return new ConfigChangeResult(ResultCode.SUCCESS, false);
}
/**
* {@inheritDoc}
*/
public boolean isBinary()
{
return false;
}
/**
* {@inheritDoc}
*/
public boolean isHumanReadable()
{
return false;
}
}