/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License, Version 1.0 only
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* (the "License"). You may not use this file except in compliance
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* with the License.
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*
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* You can obtain a copy of the license at
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* trunk/opendj3/legal-notices/CDDLv1_0.txt
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* or http://forgerock.org/license/CDDLv1.0.html.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at
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* trunk/opendj3/legal-notices/CDDLv1_0.txt. If applicable,
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* add the following below this CDDL HEADER, with the fields enclosed
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* by brackets "[]" replaced with your own identifying information:
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* Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*
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*
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* Copyright 2009 Sun Microsystems, Inc.
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* Portions copyright 2012 ForgeRock AS.
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*/
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package org.forgerock.opendj.ldap;
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import java.util.*;
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import org.forgerock.opendj.ldap.schema.AttributeType;
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import org.forgerock.opendj.ldap.schema.MatchingRule;
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import com.forgerock.opendj.util.Validator;
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/**
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* This class provides a skeletal implementation of the {@code Attribute}
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* interface, to minimize the effort required to implement this interface.
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*/
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public abstract class AbstractAttribute extends AbstractSet<ByteString>
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implements Attribute
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{
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/**
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* Returns {@code true} if {@code object} is an attribute which is equal to
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* {@code attribute}. Two attributes are considered equal if their attribute
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* descriptions are equal, they both have the same number of attribute values,
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* and every attribute value contained in the first attribute is also
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* contained in the second attribute.
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*
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* @param attribute
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* The attribute to be tested for equality.
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* @param object
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* The object to be tested for equality with the attribute.
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* @return {@code true} if {@code object} is an attribute which is equal to
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* {@code attribute}, or {@code false} if not.
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*/
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static boolean equals(final Attribute attribute, final Object object)
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{
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if (attribute == object)
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{
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return true;
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}
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if (!(object instanceof Attribute))
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{
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return false;
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}
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final Attribute other = (Attribute) object;
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if (!attribute.getAttributeDescription().equals(
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other.getAttributeDescription()))
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{
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return false;
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}
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// Attribute description is the same, compare values.
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if (attribute.size() != other.size())
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{
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return false;
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}
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return attribute.containsAll(other);
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}
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/**
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* Returns the hash code for {@code attribute}. It will be calculated as the
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* sum of the hash codes of the attribute description and all of the attribute
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* values.
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*
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* @param attribute
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* The attribute whose hash code should be calculated.
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* @return The hash code for {@code attribute}.
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*/
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static int hashCode(final Attribute attribute)
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{
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int hashCode = attribute.getAttributeDescription().hashCode();
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for (final ByteString value : attribute)
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{
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hashCode += normalizeValue(attribute, value).hashCode();
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}
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return hashCode;
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}
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/**
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* Returns the normalized form of {@code value} normalized using {@code
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* attribute}'s equality matching rule.
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*
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* @param attribute
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* The attribute whose equality matching rule should be used for
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* normalization.
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* @param value
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* The attribute value to be normalized.
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* @return The normalized form of {@code value} normalized using {@code
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* attribute}'s equality matching rule.
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*/
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static ByteString normalizeValue(final Attribute attribute,
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final ByteString value)
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{
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final AttributeDescription attributeDescription = attribute
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.getAttributeDescription();
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final AttributeType attributeType = attributeDescription.getAttributeType();
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final MatchingRule matchingRule = attributeType.getEqualityMatchingRule();
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try
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{
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return matchingRule.normalizeAttributeValue(value);
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}
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catch (final Exception e)
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{
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// Fall back to provided value.
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return value;
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}
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}
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/**
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* Returns a string representation of {@code attribute}.
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*
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* @param attribute
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* The attribute whose string representation should be returned.
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* @return The string representation of {@code attribute}.
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*/
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static String toString(final Attribute attribute)
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{
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final StringBuilder builder = new StringBuilder();
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builder.append("Attribute(");
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builder.append(attribute.getAttributeDescriptionAsString());
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builder.append(", {");
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boolean firstValue = true;
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for (final ByteString value : attribute)
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{
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if (!firstValue)
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{
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builder.append(", ");
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}
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builder.append(value);
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firstValue = false;
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}
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builder.append("})");
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return builder.toString();
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}
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/**
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* Sole constructor.
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*/
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protected AbstractAttribute()
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{
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// No implementation required.
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public abstract boolean add(ByteString value);
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/**
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* {@inheritDoc}
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*/
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public boolean add(final Object firstValue, final Object... remainingValues)
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{
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Validator.ensureNotNull(firstValue);
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boolean modified = add(ByteString.valueOf(firstValue));
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if (remainingValues != null)
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{
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for (final Object value : remainingValues)
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{
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modified |= add(ByteString.valueOf(value));
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}
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}
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return modified;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean addAll(final Collection<? extends ByteString> values)
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{
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return addAll(values, null);
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}
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/**
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* {@inheritDoc}
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*/
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public boolean addAll(final Collection<? extends ByteString> values,
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final Collection<? super ByteString> duplicateValues)
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{
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boolean modified = false;
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for (final ByteString value : values)
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{
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if (add(value))
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{
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modified = true;
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}
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else if (duplicateValues != null)
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{
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duplicateValues.add(value);
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}
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}
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return modified;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public abstract boolean contains(Object value);
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean containsAll(final Collection<?> values)
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{
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for (final Object value : values)
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{
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if (!contains(value))
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{
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return false;
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}
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}
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return true;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean equals(final Object object)
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{
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return equals(this, object);
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}
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/**
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* {@inheritDoc}
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*/
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public ByteString firstValue()
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{
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return iterator().next();
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}
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/**
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* {@inheritDoc}
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*/
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public String firstValueAsString()
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{
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return firstValue().toString();
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}
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/**
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* {@inheritDoc}
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*/
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public abstract AttributeDescription getAttributeDescription();
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/**
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* {@inheritDoc}
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*/
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public String getAttributeDescriptionAsString()
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{
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return getAttributeDescription().toString();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public int hashCode()
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{
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return hashCode(this);
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public abstract Iterator<ByteString> iterator();
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/**
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* {@inheritDoc}
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*/
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@Override
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public abstract boolean remove(Object value);
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean removeAll(final Collection<?> values)
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{
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return removeAll(values, null);
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}
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/**
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* {@inheritDoc}
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*/
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public <T> boolean removeAll(final Collection<T> values,
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final Collection<? super T> missingValues)
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{
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boolean modified = false;
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for (final T value : values)
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{
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if (remove(value))
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{
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modified = true;
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}
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else if (missingValues != null)
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{
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missingValues.add(value);
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}
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}
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return modified;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public boolean retainAll(final Collection<?> values)
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{
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return retainAll(values, null);
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}
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/**
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* {@inheritDoc}
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*/
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public <T> boolean retainAll(final Collection<T> values,
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final Collection<? super T> missingValues)
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{
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if (values.isEmpty())
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{
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if (isEmpty())
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{
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return false;
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}
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else
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{
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clear();
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return true;
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}
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}
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if (isEmpty())
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{
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if (missingValues != null)
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{
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for (final T value : values)
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{
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missingValues.add(value);
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}
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}
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return false;
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}
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final Map<ByteString, T> valuesToRetain = new HashMap<ByteString, T>(values
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.size());
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for (final T value : values)
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{
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valuesToRetain
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.put(normalizeValue(this, ByteString.valueOf(value)), value);
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}
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boolean modified = false;
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final Iterator<ByteString> iterator = iterator();
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while (iterator.hasNext())
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{
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final ByteString value = iterator.next();
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final ByteString normalizedValue = normalizeValue(this, value);
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if (valuesToRetain.remove(normalizedValue) == null)
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{
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modified = true;
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iterator.remove();
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}
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}
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if (missingValues != null)
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{
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missingValues.addAll(valuesToRetain.values());
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}
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return modified;
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public abstract int size();
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/**
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* {@inheritDoc}
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*/
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@Override
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public ByteString[] toArray()
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{
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return toArray(new ByteString[size()]);
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public String toString()
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{
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return toString(this);
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}
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}
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