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The UnboundID LDAP SDK for Java is a fast, comprehensive, and easy-to-use
Java API for communicating with LDAP directory servers and performing
related tasks like reading and writing LDIF, encoding and decoding data
using base64 and ASN.1 BER, and performing secure communication. This
package contains the Standard Edition of the LDAP SDK, which is a
complete, general-purpose library for communicating with LDAPv3 directory
servers.
/*
* Copyright 2009-2022 Ping Identity Corporation
* All Rights Reserved.
*/
/*
* Copyright 2009-2022 Ping Identity Corporation
*
* 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.
*/
/*
* Copyright (C) 2009-2022 Ping Identity Corporation
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License (GPLv2 only)
* or the terms of the GNU Lesser General Public License (LGPLv2.1 only)
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see .
*/
package com.unboundid.ldap.sdk.persist;
import java.io.Serializable;
import java.lang.reflect.Field;
import java.lang.reflect.Modifier;
import java.util.List;
import com.unboundid.ldap.sdk.Attribute;
import com.unboundid.ldap.sdk.Entry;
import com.unboundid.ldap.sdk.schema.AttributeTypeDefinition;
import com.unboundid.util.Debug;
import com.unboundid.util.NotMutable;
import com.unboundid.util.NotNull;
import com.unboundid.util.Nullable;
import com.unboundid.util.StaticUtils;
import com.unboundid.util.ThreadSafety;
import com.unboundid.util.ThreadSafetyLevel;
import com.unboundid.util.Validator;
import static com.unboundid.ldap.sdk.persist.PersistMessages.*;
/**
* This class provides a data structure that holds information about an
* annotated field.
*/
@NotMutable()
@ThreadSafety(level=ThreadSafetyLevel.COMPLETELY_THREADSAFE)
public final class FieldInfo
implements Serializable
{
/**
* The serial version UID for this serializable class.
*/
private static final long serialVersionUID = -5715642176677596417L;
// Indicates whether attempts to populate the associated field should fail if
// the LDAP attribute has a value that is not valid for the data type of the
// field.
private final boolean failOnInvalidValue;
// Indicates whether attempts to populate the associated field should fail if
// the LDAP attribute has multiple values but the field can only hold a single
// value.
private final boolean failOnTooManyValues;
// Indicates whether the associated field should be included in the entry
// created for an add operation.
private final boolean includeInAdd;
// Indicates whether the associated field should be considered for inclusion
// in the set of modifications used for modify operations.
private final boolean includeInModify;
// Indicates whether the associated field is part of the RDN.
private final boolean includeInRDN;
// Indicates whether the associated field is required when decoding.
private final boolean isRequiredForDecode;
// Indicates whether the associated field is required when encoding.
private final boolean isRequiredForEncode;
// Indicates whether the associated field should be lazily-loaded.
private final boolean lazilyLoad;
// Indicates whether the associated field supports multiple values.
private final boolean supportsMultipleValues;
// The class that contains the associated field.
@NotNull private final Class containingClass;
// The field with which this object is associated.
@NotNull private final Field field;
// The filter usage for the associated field.
@NotNull private final FilterUsage filterUsage;
// The encoder used for this field.
@NotNull private final ObjectEncoder encoder;
// The name of the associated attribute type.
@NotNull private final String attributeName;
// The default values for the field to use for object instantiation.
@NotNull private final String[] defaultDecodeValues;
// The default values for the field to use for add operations.
@NotNull private final String[] defaultEncodeValues;
// The names of the object classes for the associated attribute.
@NotNull private final String[] objectClasses;
/**
* Creates a new field info object from the provided field.
*
* @param f The field to use to create this object. It must not be
* {@code null} and it must be marked with the {@code LDAPField}
* annotation.
* @param c The class which holds the field. It must not be {@code null}
* and it must be marked with the {@code LDAPObject} annotation.
*
* @throws LDAPPersistException If a problem occurs while processing the
* given field.
*/
FieldInfo(@NotNull final Field f, @NotNull final Class c)
throws LDAPPersistException
{
Validator.ensureNotNull(f, c);
field = f;
f.setAccessible(true);
final LDAPField a = f.getAnnotation(LDAPField.class);
if (a == null)
{
throw new LDAPPersistException(ERR_FIELD_INFO_FIELD_NOT_ANNOTATED.get(
f.getName(), c.getName()));
}
final LDAPObject o = c.getAnnotation(LDAPObject.class);
if (o == null)
{
throw new LDAPPersistException(ERR_FIELD_INFO_CLASS_NOT_ANNOTATED.get(
c.getName()));
}
containingClass = c;
failOnInvalidValue = a.failOnInvalidValue();
includeInRDN = a.inRDN();
includeInAdd = (includeInRDN || a.inAdd());
includeInModify = ((! includeInRDN) && a.inModify());
filterUsage = a.filterUsage();
lazilyLoad = a.lazilyLoad();
isRequiredForDecode = (a.requiredForDecode() && (! lazilyLoad));
isRequiredForEncode = (includeInRDN || a.requiredForEncode());
defaultDecodeValues = a.defaultDecodeValue();
defaultEncodeValues = a.defaultEncodeValue();
if (lazilyLoad)
{
if (defaultDecodeValues.length > 0)
{
throw new LDAPPersistException(
ERR_FIELD_INFO_LAZY_WITH_DEFAULT_DECODE.get(f.getName(),
c.getName()));
}
if (defaultEncodeValues.length > 0)
{
throw new LDAPPersistException(
ERR_FIELD_INFO_LAZY_WITH_DEFAULT_ENCODE.get(f.getName(),
c.getName()));
}
if (includeInRDN)
{
throw new LDAPPersistException(ERR_FIELD_INFO_LAZY_IN_RDN.get(
f.getName(), c.getName()));
}
}
final int modifiers = f.getModifiers();
if (Modifier.isFinal(modifiers))
{
throw new LDAPPersistException(ERR_FIELD_INFO_FIELD_FINAL.get(
f.getName(), c.getName()));
}
if (Modifier.isStatic(modifiers))
{
throw new LDAPPersistException(ERR_FIELD_INFO_FIELD_STATIC.get(
f.getName(), c.getName()));
}
try
{
encoder = a.encoderClass().newInstance();
}
catch (final Exception e)
{
Debug.debugException(e);
throw new LDAPPersistException(ERR_FIELD_INFO_CANNOT_GET_ENCODER.get(
a.encoderClass().getName(), f.getName(), c.getName(),
StaticUtils.getExceptionMessage(e)), e);
}
if (! encoder.supportsType(f.getGenericType()))
{
throw new LDAPPersistException(
ERR_FIELD_INFO_ENCODER_UNSUPPORTED_TYPE.get(
encoder.getClass().getName(), f.getName(), c.getName(),
f.getGenericType()));
}
supportsMultipleValues = encoder.supportsMultipleValues(f);
if (supportsMultipleValues)
{
failOnTooManyValues = false;
}
else
{
failOnTooManyValues = a.failOnTooManyValues();
if (defaultDecodeValues.length > 1)
{
throw new LDAPPersistException(
ERR_FIELD_INFO_UNSUPPORTED_MULTIPLE_DEFAULT_DECODE_VALUES.get(
f.getName(), c.getName()));
}
if (defaultEncodeValues.length > 1)
{
throw new LDAPPersistException(
ERR_FIELD_INFO_UNSUPPORTED_MULTIPLE_DEFAULT_ENCODE_VALUES.get(
f.getName(), c.getName()));
}
}
final String attrName = a.attribute();
if ((attrName == null) || attrName.isEmpty())
{
attributeName = f.getName();
}
else
{
attributeName = attrName;
}
final StringBuilder invalidReason = new StringBuilder();
if (! PersistUtils.isValidLDAPName(attributeName, true, invalidReason))
{
throw new LDAPPersistException(ERR_FIELD_INFO_INVALID_ATTR_NAME.get(
f.getName(), c.getName(), invalidReason.toString()));
}
final String structuralClass;
if (o.structuralClass().isEmpty())
{
structuralClass = StaticUtils.getUnqualifiedClassName(c);
}
else
{
structuralClass = o.structuralClass();
}
final String[] ocs = a.objectClass();
if ((ocs == null) || (ocs.length == 0))
{
objectClasses = new String[] { structuralClass };
}
else
{
objectClasses = ocs;
}
for (final String s : objectClasses)
{
if (! s.equalsIgnoreCase(structuralClass))
{
boolean found = false;
for (final String oc : o.auxiliaryClass())
{
if (s.equalsIgnoreCase(oc))
{
found = true;
break;
}
}
if (! found)
{
throw new LDAPPersistException(ERR_FIELD_INFO_INVALID_OC.get(
f.getName(), c.getName(), s));
}
}
}
}
/**
* Retrieves the field with which this object is associated.
*
* @return The field with which this object is associated.
*/
@NotNull()
public Field getField()
{
return field;
}
/**
* Retrieves the class that is marked with the {@link LDAPObject} annotation
* and contains the associated field.
*
* @return The class that contains the associated field.
*/
@NotNull()
public Class getContainingClass()
{
return containingClass;
}
/**
* Indicates whether attempts to initialize an object should fail if the LDAP
* attribute has a value that cannot be stored in the associated field.
*
* @return {@code true} if an exception should be thrown if an LDAP attribute
* has a value that cannot be assigned to the associated field, or
* {@code false} if the field should remain uninitialized.
*/
public boolean failOnInvalidValue()
{
return failOnInvalidValue;
}
/**
* Indicates whether attempts to initialize an object should fail if the
* LDAP attribute has multiple values but the associated field can only hold a
* single value. Note that the value returned from this method may be
* {@code false} even when the annotation has a value of {@code true} if the
* associated field supports multiple values.
*
* @return {@code true} if an exception should be thrown if an attribute has
* too many values to hold in the associated field, or {@code false}
* if the first value returned should be assigned to the field.
*/
public boolean failOnTooManyValues()
{
return failOnTooManyValues;
}
/**
* Indicates whether the associated field should be included in entries
* generated for add operations. Note that the value returned from this
* method may be {@code true} even when the annotation has a value of
* {@code false} if the associated field is to be included in entry RDNs.
*
* @return {@code true} if the associated field should be included in entries
* generated for add operations, or {@code false} if not.
*/
public boolean includeInAdd()
{
return includeInAdd;
}
/**
* Indicates whether the associated field should be considered for inclusion
* in the set of modifications generated for modify operations. Note that the
* value returned from this method may be {@code false} even when the
* annotation has a value of {@code true} for the {@code inModify} element if
* the associated field is to be included in entry RDNs.
*
* @return {@code true} if the associated field should be considered for
* inclusion in the set of modifications generated for modify
* operations, or {@code false} if not.
*/
public boolean includeInModify()
{
return includeInModify;
}
/**
* Indicates whether the associated field should be used to generate entry
* RDNs.
*
* @return {@code true} if the associated field should be used to generate
* entry RDNs, or {@code false} if not.
*/
public boolean includeInRDN()
{
return includeInRDN;
}
/**
* Retrieves the filter usage for the associated field.
*
* @return The filter usage for the associated field.
*/
@NotNull()
public FilterUsage getFilterUsage()
{
return filterUsage;
}
/**
* Indicates whether the associated field should be considered required for
* decode operations.
*
* @return {@code true} if the associated field should be considered required
* for decode operations, or {@code false} if not.
*/
public boolean isRequiredForDecode()
{
return isRequiredForDecode;
}
/**
* Indicates whether the associated field should be considered required for
* encode operations. Note that the value returned from this method may be
* {@code true} even when the annotation has a value of {@code true} for the
* {@code requiredForEncode} element if the associated field is to be included
* in entry RDNs.
*
* @return {@code true} if the associated field should be considered required
* for encode operations, or {@code false} if not.
*/
public boolean isRequiredForEncode()
{
return isRequiredForEncode;
}
/**
* Indicates whether the associated field should be lazily-loaded.
*
* @return {@code true} if the associated field should be lazily-loaded, or
* {@code false} if not.
*/
public boolean lazilyLoad()
{
return lazilyLoad;
}
/**
* Retrieves the encoder that should be used for the associated field.
*
* @return The encoder that should be used for the associated field.
*/
@NotNull()
public ObjectEncoder getEncoder()
{
return encoder;
}
/**
* Retrieves the name of the LDAP attribute used to hold values for the
* associated field.
*
* @return The name of the LDAP attribute used to hold values for the
* associated field.
*/
@NotNull()
public String getAttributeName()
{
return attributeName;
}
/**
* Retrieves the set of default values that should be assigned to the
* associated field if there are no values for the corresponding attribute in
* the LDAP entry.
*
* @return The set of default values for use when instantiating the object,
* or an empty array if no default values are defined.
*/
@NotNull()
public String[] getDefaultDecodeValues()
{
return defaultDecodeValues;
}
/**
* Retrieves the set of default values that should be used when creating an
* entry for an add operation if the associated field does not itself have any
* values.
*
* @return The set of default values for use in add operations, or an empty
* array if no default values are defined.
*/
@NotNull()
public String[] getDefaultEncodeValues()
{
return defaultEncodeValues;
}
/**
* Retrieves the names of the object classes containing the associated
* attribute.
*
* @return The names of the object classes containing the associated
* attribute.
*/
@NotNull()
public String[] getObjectClasses()
{
return objectClasses;
}
/**
* Indicates whether the associated field can hold multiple values.
*
* @return {@code true} if the associated field can hold multiple values, or
* {@code false} if not.
*/
public boolean supportsMultipleValues()
{
return supportsMultipleValues;
}
/**
* Constructs a definition for an LDAP attribute type which may be added to
* the directory server schema to allow it to hold the value of the associated
* field. Note that the object identifier used for the constructed attribute
* type definition is not required to be valid or unique.
*
* @return The constructed attribute type definition.
*
* @throws LDAPPersistException If the object encoder does not support
* encoding values for the associated field
* type.
*/
@NotNull()
AttributeTypeDefinition constructAttributeType()
throws LDAPPersistException
{
return constructAttributeType(DefaultOIDAllocator.getInstance());
}
/**
* Constructs a definition for an LDAP attribute type which may be added to
* the directory server schema to allow it to hold the value of the associated
* field. Note that the object identifier used for the constructed attribute
* type definition is not required to be valid or unique.
*
* @param a The OID allocator to use to generate the object identifier. It
* must not be {@code null}.
*
* @return The constructed attribute type definition.
*
* @throws LDAPPersistException If the object encoder does not support
* encoding values for the associated field
* type.
*/
@NotNull()
AttributeTypeDefinition constructAttributeType(@NotNull final OIDAllocator a)
throws LDAPPersistException
{
return encoder.constructAttributeType(field, a);
}
/**
* Encodes the value for the associated field from the provided object to an
* attribute.
*
* @param o The object containing the field to be encoded.
* @param ignoreRequiredFlag Indicates whether to ignore the value of the
* {@code requiredForEncode} setting. If this is
* {@code true}, then this method will always
* return {@code null} if the field does not have
* a value even if this field is marked as
* required for encode processing.
*
* @return The attribute containing the encoded representation of the field
* value if it is non-{@code null}, an encoded representation of the
* default add values if the associated field is {@code null} but
* default values are defined, or {@code null} if the associated
* field is {@code null} and there are no default values.
*
* @throws LDAPPersistException If a problem occurs while encoding the
* value of the associated field for the
* provided object, or if the field is marked
* as required but is {@code null} and does not
* have any default add values.
*/
@Nullable()
Attribute encode(@NotNull final Object o, final boolean ignoreRequiredFlag)
throws LDAPPersistException
{
try
{
final Object fieldValue = field.get(o);
if (fieldValue == null)
{
if (defaultEncodeValues.length > 0)
{
return new Attribute(attributeName, defaultEncodeValues);
}
if (isRequiredForEncode && (! ignoreRequiredFlag))
{
throw new LDAPPersistException(
ERR_FIELD_INFO_MISSING_REQUIRED_VALUE.get(field.getName(),
containingClass.getName()));
}
return null;
}
return encoder.encodeFieldValue(field, fieldValue, attributeName);
}
catch (final LDAPPersistException lpe)
{
Debug.debugException(lpe);
throw lpe;
}
catch (final Exception e)
{
Debug.debugException(e);
throw new LDAPPersistException(
ERR_FIELD_INFO_CANNOT_ENCODE.get(field.getName(),
containingClass.getName(), StaticUtils.getExceptionMessage(e)),
e);
}
}
/**
* Sets the value of the associated field in the given object from the
* information contained in the provided attribute.
*
* @param o The object for which to update the associated
* field.
* @param e The entry being decoded.
* @param failureReasons A list to which information about any failures
* may be appended.
*
* @return {@code true} if the decode process was completely successful, or
* {@code false} if there were one or more failures.
*/
boolean decode(@NotNull final Object o, @NotNull final Entry e,
@NotNull final List failureReasons)
{
boolean successful = true;
Attribute a = e.getAttribute(attributeName);
if ((a == null) || (! a.hasValue()))
{
if (defaultDecodeValues.length > 0)
{
a = new Attribute(attributeName, defaultDecodeValues);
}
else
{
if (isRequiredForDecode)
{
successful = false;
failureReasons.add(ERR_FIELD_INFO_MISSING_REQUIRED_ATTRIBUTE.get(
containingClass.getName(), e.getDN(), attributeName,
field.getName()));
}
try
{
encoder.setNull(field, o);
}
catch (final LDAPPersistException lpe)
{
Debug.debugException(lpe);
successful = false;
failureReasons.add(lpe.getMessage());
}
return successful;
}
}
if (failOnTooManyValues && (a.size() > 1))
{
successful = false;
failureReasons.add(ERR_FIELD_INFO_FIELD_NOT_MULTIVALUED.get(a.getName(),
field.getName(), containingClass.getName()));
}
try
{
encoder.decodeField(field, o, a);
}
catch (final LDAPPersistException lpe)
{
Debug.debugException(lpe);
if (failOnInvalidValue)
{
successful = false;
failureReasons.add(lpe.getMessage());
}
}
return successful;
}
}