/*******************************************************************************
 * Copyright (c) 2007, 2018 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.db.impl.query;

import org.simantics.db.request.RequestFlags;

public abstract class StringQuery<Procedure> extends CacheEntryBase<Procedure> implements Query {

    public final String id;
    protected final int hash;

    public StringQuery(String id) {
        assert(id != null);
        this.id = id;
        hash = id.hashCode();
    }

    @Override
    int makeHash() {
        return id.hashCode();
    }

    protected static final int hash(String id) {
        return id.hashCode();
    }

    @Override
    public int type() {
        return RequestFlags.INVALIDATE;
    }

    @Override
    final public boolean equals(Object object) {
        if (this == object)
            return true;
        else if (object == null)
            return false;
        else if (getClass() != object.getClass())
            return false;
        StringQuery<?> other = (StringQuery<?>) object;
        return id == other.id;
    }

    @Override
    final public Query getQuery() {
        return this;
    }

    abstract public void removeEntry(QueryProcessor provider);

}