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 *  distributed with this work for additional information
 *  regarding copyright ownership.  The ASF licenses this file
 *  to you under the Apache License, Version 2.0 (the
 *  "License"); you may not use this file except in compliance
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 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
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package org.apache.cayenne.access.trans;

import org.apache.cayenne.map.DbEntity;
import org.apache.cayenne.map.DbRelationship;
import org.apache.cayenne.query.DeleteQuery;

/** Class implements default translation mechanism of org.apache.cayenne.query.DeleteQuery
 *  objects to SQL DELETE statements.
 *
 *  @author Andrus Adamchik
 *  @deprecated since 3.0 since {@link DeleteQuery} is deprecacted.
 */
public class DeleteTranslator extends QueryAssembler {

    public String aliasForTable(DbEntity dbEnt) {
        throw new RuntimeException("aliases not supported");
    }

    public void dbRelationshipAdded(DbRelationship dbRel) {
        throw new RuntimeException("db relationships not supported");
    }

    /** Main method of DeleteTranslator class. Translates DeleteQuery
     *  into a JDBC PreparedStatement
     */
    public String createSqlString() throws Exception {
        StringBuffer queryBuf = new StringBuffer("DELETE FROM ");

        // 1. append table name
        DbEntity dbEnt = getRootDbEntity();
        queryBuf.append(dbEnt.getFullyQualifiedName());

        // 2. build qualifier
        String qualifierStr =
            adapter.getQualifierTranslator(this).doTranslation();
        if (qualifierStr != null)
            queryBuf.append(" WHERE ").append(qualifierStr);

        return queryBuf.toString();
    }
}
