/*
 ***************************************************************************************
 *  Copyright (C) 2006 EsperTech, Inc. All rights reserved.                            *
 *  http://www.espertech.com/esper                                                     *
 *  http://www.espertech.com                                                           *
 *  ---------------------------------------------------------------------------------- *
 *  The software in this package is published under the terms of the GPL license       *
 *  a copy of which has been included with this distribution in the license.txt file.  *
 ***************************************************************************************
 */
package com.espertech.esper.epl.lookup;

import com.espertech.esper.epl.join.plan.QueryPlanIndexItem;

import java.util.HashSet;
import java.util.Set;

public class EventTableIndexMetadataEntry extends EventTableIndexEntryBase {
    private final boolean primary;
    private final Set<String> referencedByStmt;
    private final QueryPlanIndexItem queryPlanIndexItem;
    private final String explicitIndexNameIfExplicit;

    public EventTableIndexMetadataEntry(String optionalIndexName, boolean primary, QueryPlanIndexItem queryPlanIndexItem, String explicitIndexNameIfExplicit) {
        super(optionalIndexName);
        this.primary = primary;
        this.queryPlanIndexItem = queryPlanIndexItem;
        referencedByStmt = primary ? null : new HashSet<String>();
        this.explicitIndexNameIfExplicit = explicitIndexNameIfExplicit;
    }

    public void addReferringStatement(String statementName) {
        if (!primary) {
            referencedByStmt.add(statementName);
        }
    }

    public boolean removeReferringStatement(String referringStatementName) {
        if (!primary) {
            referencedByStmt.remove(referringStatementName);
            if (referencedByStmt.isEmpty()) {
                return true;
            }
        }
        return false;
    }

    public boolean isPrimary() {
        return primary;
    }

    public String[] getReferringStatements() {
        return referencedByStmt.toArray(new String[referencedByStmt.size()]);
    }

    public QueryPlanIndexItem getQueryPlanIndexItem() {
        return queryPlanIndexItem;
    }

    public String getExplicitIndexNameIfExplicit() {
        return explicitIndexNameIfExplicit;
    }
}