/*
   Copyright (c) 2010, 2013, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

package com.mysql.clusterj.core.query;

import com.mysql.clusterj.core.spi.QueryExecutionContext;
import com.mysql.clusterj.core.store.Operation;
import com.mysql.clusterj.core.store.ScanFilter;
import com.mysql.clusterj.core.store.ScanOperation;
import com.mysql.clusterj.ClusterJException;
import com.mysql.clusterj.ClusterJFatalInternalException;
import com.mysql.clusterj.query.Predicate;
import java.util.ArrayList;
import java.util.List;

public class AndPredicateImpl extends PredicateImpl {

    List<PredicateImpl> predicates = new ArrayList<PredicateImpl>();

    public AndPredicateImpl(QueryDomainTypeImpl<?> dobj,
            PredicateImpl left, PredicateImpl right) {
        super(dobj);
        predicates.add(left);
        predicates.add(right);
    }

    @Override
    public Predicate and(Predicate predicate) {
        if (predicate instanceof ComparativePredicateImpl) {
            predicates.add((PredicateImpl)predicate);
            return this;
        } else if (predicate instanceof AndPredicateImpl) {
            predicates.addAll(((AndPredicateImpl)predicate).predicates);
            return this;
        } else if (predicate instanceof OrPredicateImpl) {
            predicates.add((PredicateImpl)predicate);
            return this;
        } else if (predicate instanceof InPredicateImpl) {
            predicates.add((PredicateImpl)predicate);
            return this;
        } else if (predicate instanceof NotPredicateImpl) {
            predicates.add((PredicateImpl)predicate);
            return this;
        } else if (predicate instanceof BetweenPredicateImpl) {
            predicates.add((PredicateImpl)predicate);
            return this;
        } else {
            throw new UnsupportedOperationException(
                    local.message("ERR_NotImplemented"));
        }
    }

    @Override
    public Predicate or(Predicate predicate) {
        throw new UnsupportedOperationException(
                local.message("ERR_NotImplemented"));
    }

    @Override
    public Predicate not() {
        throw new UnsupportedOperationException(
                local.message("ERR_NotImplemented"));
    }

    @Override
    public void markParameters() {
        for (PredicateImpl predicateImpl: predicates) {
            predicateImpl.markParameters();
        }
    }

    @Override
    public void unmarkParameters() {
        for (PredicateImpl predicateImpl: predicates) {
            predicateImpl.unmarkParameters();
        }
    }

    /** Create a filter for the operation. Set the conditions into the
     * new filter, one for each predicate.
     * @param context the query execution context with the parameter values
     * @param op the operation
     */
    @Override
    public void filterCmpValue(QueryExecutionContext context,
            ScanOperation op) {
        try {
            ScanFilter filter = op.getScanFilter(context);
            filter.begin(ScanFilter.Group.GROUP_AND);
            for (PredicateImpl predicate: predicates) {
                predicate.filterCmpValue(context, op, filter);
            }
            filter.end();
        } catch (Exception ex) {
            throw new ClusterJException(
                    local.message("ERR_Get_NdbFilter"), ex);
        }
    }

    /** Set the keys into the operation for each predicate.
     * Each predicate must be an equal predicate for a primary or unique key.
     */
    @Override
    public void operationEqual(QueryExecutionContext context,
            Operation op) {
        for (PredicateImpl predicate: predicates) {
            if (!(predicate instanceof EqualPredicateImpl)) {
                throw new ClusterJFatalInternalException(
                        local.message("ERR_Implementation_Should_Not_Occur"));
            }
            predicate.operationEqual(context, op);
        }
    }

    /** Get the number of conditions in the top level predicate.
     * This is used to determine whether a hash index can be used. If there
     * are exactly the number of conditions as index columns, then the
     * hash index might be used.
     * For AND predicates, there is one condition for each predicate included
     * in the AND.
     * AndPredicateImpl overrides this method.
     * @return the number of conditions
     */
    @Override
    protected int getNumberOfConditionsInPredicate() {
        return predicates.size();
    }

    /** Return an array of top level predicates that might be used with indices.
     * 
     * @return an array of top level predicates (defaults to {this}).
     */
    @Override
    protected PredicateImpl[] getTopLevelPredicates() {
        return predicates.toArray(new PredicateImpl[predicates.size()]);
    }

}
