/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (the "License").  You may not use this file except in compliance
 * with the License.
 *
 * You can obtain a copy of the license at legal-notices/CDDLv1_0.txt
 * or http://forgerock.org/license/CDDLv1.0.html.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at legal-notices/CDDLv1_0.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information:
 *      Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 *
 *
 *      Copyright 2008 Sun Microsystems, Inc.
 */
package org.opends.server.admin.condition;

import java.util.SortedSet;

import org.forgerock.opendj.ldap.ErrorResultException;
import org.opends.server.admin.AbstractManagedObjectDefinition;
import org.opends.server.admin.IllegalPropertyValueStringException;
import org.opends.server.admin.PropertyDefinition;
import org.opends.server.admin.client.ManagedObject;
import org.opends.server.admin.client.ManagementContext;
import org.opends.server.admin.server.ServerManagedObject;
import org.opends.server.config.ConfigException;

import com.forgerock.opendj.util.Validator;

/**
 * A condition which evaluates to <code>true</code> if and only if a property
 * contains a particular value.
 */
public final class ContainsCondition implements Condition {

    /**
     * The strongly typed underlying implementation.
     *
     * @param <T>
     *            The type of the property value being tested.
     */
    private static final class Impl<T> implements Condition {

        // The property.
        final PropertyDefinition<T> pd;

        // The required property value.
        final T value;

        // Private constructor.
        private Impl(PropertyDefinition<T> pd, T value) throws IllegalPropertyValueStringException {
            this.pd = pd;
            this.value = value;
        }

        /**
         * {@inheritDoc}
         */
        public boolean evaluate(ManagementContext context, ManagedObject<?> managedObject) throws ErrorResultException {
            SortedSet<T> values = managedObject.getPropertyValues(pd);
            return values.contains(value);
        }

        /**
         * {@inheritDoc}
         */
        public boolean evaluate(ServerManagedObject<?> managedObject) throws ConfigException {
            SortedSet<T> values = managedObject.getPropertyValues(pd);
            return values.contains(value);
        }

        /**
         * {@inheritDoc}
         */
        public void initialize(AbstractManagedObjectDefinition<?, ?> d) throws Exception {
            // Not used.
        }

        // Private implementation of fix() method.
        private void setPropertyValue(ManagedObject<?> managedObject) {
            managedObject.setPropertyValue(pd, value);
        }

    }

    // The strongly typed private implementation.
    private Impl<?> impl = null;

    // The property name.
    private final String propertyName;

    // The string representation of the required property value.
    private final String propertyStringValue;

    /**
     * Creates a new contains value condition.
     *
     * @param propertyName
     *            The property name.
     * @param stringValue
     *            The string representation of the required property value.
     */
    public ContainsCondition(String propertyName, String stringValue) {
        Validator.ensureNotNull(propertyName, stringValue);
        this.propertyName = propertyName;
        this.propertyStringValue = stringValue;
    }

    /**
     * {@inheritDoc}
     */
    public boolean evaluate(ManagementContext context, ManagedObject<?> managedObject) throws ErrorResultException {
        return impl.evaluate(context, managedObject);
    }

    /**
     * {@inheritDoc}
     */
    public boolean evaluate(ServerManagedObject<?> managedObject) throws ConfigException {
        return impl.evaluate(managedObject);
    }

    /**
     * Modifies the provided managed object so that it has the property value
     * associated with this condition.
     *
     * @param managedObject
     *            The managed object.
     */
    public void setPropertyValue(ManagedObject<?> managedObject) {
        impl.setPropertyValue(managedObject);
    }

    /**
     * {@inheritDoc}
     */
    public void initialize(AbstractManagedObjectDefinition<?, ?> d) throws Exception {
        // Decode the property.
        buildImpl(d.getPropertyDefinition(propertyName));
    }

    // Creates the new private implementation.
    private <T> void buildImpl(PropertyDefinition<T> pd) throws IllegalPropertyValueStringException {
        T value = pd.decodeValue(propertyStringValue);
        this.impl = new Impl<T>(pd, value);
    }

    /**
     * Returns the property definition associated with this condition.
     *
     * @return the property definition associated with this condition.
     */
    public PropertyDefinition<?> getPropertyDefinition() {
        return impl.pd;
    }

    /**
     * Returns the value that must be set for this condition to be fulfilled.
     *
     * @return the value that must be set for this condition to be fulfilled.
     */
    public Object getValue() {
        return impl.value;
    }
}