/*
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* The contents of this file are subject to the terms of the Common Development and
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* Distribution License (the License). You may not use this file except in compliance with the
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* License.
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*
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* You can obtain a copy of the License at legal/CDDLv1.0.txt. See the License for the
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* specific language governing permission and limitations under the License.
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*
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* When distributing Covered Software, include this CDDL Header Notice in each file and include
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* the License file at legal/CDDLv1.0.txt. If applicable, add the following below the CDDL
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* Header, with the fields enclosed by brackets [] replaced by your own identifying
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* information: "Portions Copyright [year] [name of copyright owner]".
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*
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* Copyright 2013-2016 ForgeRock AS.
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*/
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package org.forgerock.opendj.rest2ldap;
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import static org.forgerock.opendj.rest2ldap.Rest2ldapMessages.*;
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import static java.util.Collections.emptyList;
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import static java.util.Collections.singletonList;
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import static org.forgerock.opendj.ldap.Attributes.emptyAttribute;
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import static org.forgerock.opendj.rest2ldap.Rest2Ldap.asResourceException;
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import static org.forgerock.opendj.rest2ldap.Utils.isNullOrEmpty;
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import static org.forgerock.opendj.rest2ldap.Utils.newBadRequestException;
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import static org.forgerock.opendj.rest2ldap.Utils.newNotSupportedException;
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import static org.forgerock.opendj.rest2ldap.WritabilityPolicy.READ_WRITE;
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import static org.forgerock.util.promise.Promises.newExceptionPromise;
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import static org.forgerock.util.promise.Promises.newResultPromise;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.List;
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import java.util.Set;
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import org.forgerock.json.JsonPointer;
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import org.forgerock.json.JsonValue;
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import org.forgerock.json.resource.BadRequestException;
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import org.forgerock.json.resource.PatchOperation;
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import org.forgerock.json.resource.ResourceException;
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import org.forgerock.opendj.ldap.Attribute;
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import org.forgerock.opendj.ldap.AttributeDescription;
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import org.forgerock.opendj.ldap.Entry;
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import org.forgerock.opendj.ldap.LinkedAttribute;
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import org.forgerock.opendj.ldap.Modification;
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import org.forgerock.opendj.ldap.ModificationType;
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import org.forgerock.services.context.Context;
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import org.forgerock.util.Function;
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import org.forgerock.util.promise.Promise;
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import org.forgerock.util.promise.Promises;
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/**
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* An abstract LDAP property mapper which provides a simple mapping from a JSON
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* value to a single LDAP attribute.
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*/
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abstract class AbstractLdapPropertyMapper<T extends AbstractLdapPropertyMapper<T>> extends PropertyMapper {
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List<Object> defaultJsonValues = emptyList();
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final AttributeDescription ldapAttributeName;
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private boolean isRequired;
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private boolean isMultiValued;
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private WritabilityPolicy writabilityPolicy = READ_WRITE;
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AbstractLdapPropertyMapper(final AttributeDescription ldapAttributeName) {
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this.ldapAttributeName = ldapAttributeName;
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}
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/**
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* Indicates that the LDAP attribute is mandatory and must be provided during create requests.
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*
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* @param isRequired {@code true} if this property is required.
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* @return This property mapper.
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*/
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public final T isRequired(final boolean isRequired) {
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this.isRequired = isRequired;
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return getThis();
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}
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/**
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* Indicates that the LDAP attribute is multi-valued and should be represented in JSON using an array of values.
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*
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* @param isMultiValued {@code true} if this property is multi-valued.
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* @return This property mapper.
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*/
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public final T isMultiValued(final boolean isMultiValued) {
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this.isMultiValued = isMultiValued;
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return getThis();
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}
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/**
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* Indicates whether the LDAP attribute supports updates. The default is {@link WritabilityPolicy#READ_WRITE}.
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*
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* @param policy
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* The writability policy.
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* @return This property mapper.
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*/
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public final T writability(final WritabilityPolicy policy) {
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this.writabilityPolicy = policy;
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return getThis();
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}
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boolean attributeIsSingleValued() {
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return !isMultiValued || ldapAttributeName.getAttributeType().isSingleValue();
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}
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@Override
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Promise<List<Attribute>, ResourceException> create(final Context context,
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final Resource resource, final JsonPointer path,
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final JsonValue v) {
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return getNewLdapAttributes(context, resource, path, v).then(
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new Function<Attribute, List<Attribute>, ResourceException>() {
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@Override
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public List<Attribute> apply(Attribute newLDAPAttribute) throws ResourceException {
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if (!writabilityPolicy.canCreate(ldapAttributeName)) {
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if (!newLDAPAttribute.isEmpty() && !writabilityPolicy.discardWrites()) {
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throw newBadRequestException(ERR_CREATION_READ_ONLY_FIELD.get(path));
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}
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return Collections.emptyList();
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} else if (newLDAPAttribute.isEmpty()) {
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if (isRequired) {
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throw newBadRequestException(ERR_MISSING_REQUIRED_FIELD.get(path));
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}
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return Collections.emptyList();
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}
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return singletonList(newLDAPAttribute);
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}
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});
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}
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@Override
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void getLdapAttributes(final JsonPointer path, final JsonPointer subPath, final Set<String> ldapAttributes) {
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ldapAttributes.add(ldapAttributeName.toString());
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}
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abstract Promise<Attribute, ResourceException> getNewLdapAttributes(Context context, Resource resource,
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JsonPointer path, List<Object> newValues);
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abstract T getThis();
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@Override
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Promise<List<Modification>, ResourceException> patch(final Context context, final Resource resource,
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final JsonPointer path, final PatchOperation operation) {
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try {
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final JsonPointer field = operation.getField();
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final JsonValue v = operation.getValue();
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// Reject any attempts to patch this field if it is read-only, even if it is configured to discard writes.
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if (!writabilityPolicy.canWrite(ldapAttributeName)) {
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throw newBadRequestException(ERR_MODIFY_READ_ONLY_FIELD.get("patch", path));
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}
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switch (field.size()) {
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case 0:
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/*
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* The patch operation targets the entire mapping. If this
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* mapping is multi-valued, then the patch value must be a list
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* of values to be added, removed, or replaced. If it is
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* single-valued then the patch value must not be a list.
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*/
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if (attributeIsSingleValued()) {
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if (v.isList()) {
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// Single-valued field violation.
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throw newBadRequestException(ERR_ARRAY_FOR_SINGLE_VALUED_FIELD.get(path));
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}
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} else if (!v.isList() && !operation.isIncrement()
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&& !(v.isNull() && (operation.isReplace() || operation.isRemove()))) {
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// Multi-valued field violation.
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throw newBadRequestException(ERR_NO_ARRAY_FOR_MULTI_VALUED_FIELD.get(path));
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}
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break;
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case 1:
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/*
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* The patch operation targets a sub-field. If the sub-field
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* name is a number then it is an attempt to patch a single
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* value at a specific index. Rest2LDAP cannot support indexed
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* updates because LDAP attribute values are unordered. We will,
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* however, support the special index "-" indicating that a
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* value should be appended.
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*/
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final String fieldName = field.get(0);
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if (fieldName.equals("-") && operation.isAdd()) {
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// Append a single value.
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if (attributeIsSingleValued()) {
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throw newBadRequestException(ERR_PATCH_APPEND_IN_SINGLE_VALUED_FIELD.get(path));
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} else if (v.isList()) {
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throw newBadRequestException(
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ERR_PATCH_INDEXED_APPEND_TO_MULTI_VALUED_FIELD.get(path.child(fieldName)));
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}
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} else if (fieldName.matches("[0-9]+")) {
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// Array index - not allowed.
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throw newNotSupportedException(ERR_PATCH_INDEXED_OPERATION.get(path.child(fieldName)));
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} else {
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throw newBadRequestException(ERR_UNRECOGNIZED_FIELD.get(path.child(fieldName)));
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}
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break;
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default:
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/*
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* The patch operation targets the child of a sub-field. This is
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* not possible for a LDAP property mapper.
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*/
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throw newBadRequestException(ERR_UNRECOGNIZED_FIELD.get(path.child(field.get(0))));
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}
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// Check that the values are compatible with the type of patch operation.
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final List<Object> newValues = asList(v, Collections.emptyList());
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final ModificationType modType;
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if (operation.isAdd()) {
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/*
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* Use a replace for single valued fields in case the underlying
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* LDAP attribute is multi-valued, or the attribute already
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* contains a value.
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*/
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modType = attributeIsSingleValued() ? ModificationType.REPLACE : ModificationType.ADD;
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if (newValues.isEmpty()) {
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throw newBadRequestException(ERR_PATCH_ADD_NO_VALUE_FOR_FIELD.get(path.child(field.get(0))));
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}
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} else if (operation.isRemove()) {
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modType = ModificationType.DELETE;
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} else if (operation.isReplace()) {
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modType = ModificationType.REPLACE;
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} else if (operation.isIncrement()) {
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modType = ModificationType.INCREMENT;
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} else {
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throw newNotSupportedException(ERR_PATCH_UNSUPPORTED_OPERATION.get(operation.getOperation()));
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}
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// Create the modification.
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if (newValues.isEmpty()) {
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// Deleting the attribute.
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if (isRequired) {
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return Promises.<List<Modification>, ResourceException> newExceptionPromise(
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newBadRequestException(ERR_REMOVE_REQUIRED_FIELD.get("update", path)));
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} else {
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return newResultPromise(
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singletonList(new Modification(modType, emptyAttribute(ldapAttributeName))));
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}
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} else {
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return getNewLdapAttributes(context, resource, path, newValues)
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.then(new Function<Attribute, List<Modification>, ResourceException>() {
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@Override
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public List<Modification> apply(final Attribute value) {
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return singletonList(new Modification(modType, value));
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}
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});
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}
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} catch (final RuntimeException e) {
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return asResourceException(e).asPromise();
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} catch (final ResourceException e) {
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return newExceptionPromise(e);
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}
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}
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@Override
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Promise<List<Modification>, ResourceException> update(final Context context, final Resource resource,
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final JsonPointer path, final Entry e, final JsonValue v) {
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return getNewLdapAttributes(context, resource, path, v).then(
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new Function<Attribute, List<Modification>, ResourceException>() {
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@Override
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public List<Modification> apply(final Attribute newLDAPAttribute) throws ResourceException {
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// Get the existing LDAP attribute.
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final Attribute tmp = e.getAttribute(ldapAttributeName);
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final Attribute oldLDAPAttribute = tmp != null ? tmp : emptyAttribute(ldapAttributeName);
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/*
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* If the attribute is read-only then handle the following cases:
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* 1) new values are provided and they are the same as the existing values
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* 2) no new values are provided.
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*/
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if (!writabilityPolicy.canWrite(ldapAttributeName)) {
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if (newLDAPAttribute.isEmpty()
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|| newLDAPAttribute.equals(oldLDAPAttribute)
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|| writabilityPolicy.discardWrites()) {
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// No change.
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return Collections.emptyList();
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}
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throw newBadRequestException(ERR_MODIFY_READ_ONLY_FIELD.get("update", path));
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}
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if (oldLDAPAttribute.isEmpty() && newLDAPAttribute.isEmpty()) {
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// No change.
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return Collections.emptyList();
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} else if (oldLDAPAttribute.isEmpty()) {
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// The attribute is being added.
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return singletonList(new Modification(ModificationType.REPLACE, newLDAPAttribute));
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} else if (newLDAPAttribute.isEmpty()) {
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// The attribute is being deleted - this is not allowed if the attribute is required.
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if (isRequired) {
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throw newBadRequestException(ERR_REMOVE_REQUIRED_FIELD.get("update", path));
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}
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return singletonList(new Modification(ModificationType.REPLACE, newLDAPAttribute));
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} else {
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/*
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* We could do a replace, but try to save bandwidth and send diffs instead.
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* Perform deletes first in case we don't have an appropriate normalizer:
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* permissive add(x) followed by delete(x) is destructive, whereas
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* delete(x) followed by add(x) is idempotent when adding/removing the same value.
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*/
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final List<Modification> modifications = new ArrayList<>(2);
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final Attribute deletedValues = new LinkedAttribute(oldLDAPAttribute);
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deletedValues.removeAll(newLDAPAttribute);
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if (!deletedValues.isEmpty()) {
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modifications.add(new Modification(ModificationType.DELETE, deletedValues));
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}
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final Attribute addedValues = new LinkedAttribute(newLDAPAttribute);
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addedValues.removeAll(oldLDAPAttribute);
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if (!addedValues.isEmpty()) {
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modifications.add(new Modification(ModificationType.ADD, addedValues));
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}
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return modifications;
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}
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}
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});
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}
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private List<Object> asList(final JsonValue v, final List<Object> defaultValues) {
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if (isNullOrEmpty(v)) {
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return defaultValues;
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} else if (v.isList()) {
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return v.asList();
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} else {
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return singletonList(v.getObject());
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}
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}
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private void checkSchema(final JsonPointer path, final JsonValue v) throws BadRequestException {
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if (attributeIsSingleValued()) {
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if (v != null && v.isList()) {
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// Single-valued field violation.
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throw newBadRequestException(ERR_ARRAY_FOR_SINGLE_VALUED_FIELD.get(path));
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}
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} else if (v != null && !v.isList()) {
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// Multi-valued field violation.
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throw newBadRequestException(ERR_NO_ARRAY_FOR_MULTI_VALUED_FIELD.get(path));
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}
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}
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private Promise<Attribute, ResourceException> getNewLdapAttributes(final Context context,
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final Resource resource, final JsonPointer path,
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final JsonValue v) {
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try {
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// Ensure that the value is of the correct type.
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checkSchema(path, v);
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final List<Object> newValues = asList(v, defaultJsonValues);
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if (newValues.isEmpty()) {
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// Skip sub-class implementation if there are no values.
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return newResultPromise(emptyAttribute(ldapAttributeName));
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} else {
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return getNewLdapAttributes(context, resource, path, newValues);
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}
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} catch (final Exception e) {
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return asResourceException(e).asPromise();
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}
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}
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}
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