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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
 *  with the License.  You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 *  Unless required by applicable law or agreed to in writing,
 *  software distributed under the License is distributed on an
 *  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *  KIND, either express or implied.  See the License for the
 *  specific language governing permissions and limitations
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package org.apache.cayenne.crypto.transformer;

import org.apache.cayenne.access.translator.DbAttributeBinding;
import org.apache.cayenne.access.types.ExtendedType;
import org.apache.cayenne.access.types.ExtendedTypeMap;
import org.apache.cayenne.crypto.transformer.bytes.BytesEncryptor;
import org.apache.cayenne.crypto.transformer.value.ValueEncryptor;

/**
 * @since 4.0
 */
public class DefaultBindingsTransformer implements BindingsTransformer {

    private int[] positions;
    private ValueEncryptor[] transformers;
    private BytesEncryptor encryptor;
    private ExtendedTypeMap extendedTypeMap;

    public DefaultBindingsTransformer(int[] positions,
                                      ValueEncryptor[] transformers,
                                      BytesEncryptor encryptor,
                                      ExtendedTypeMap extendedTypeMap) {
        this.positions = positions;
        this.transformers = transformers;
        this.encryptor = encryptor;
        this.extendedTypeMap = extendedTypeMap;
    }

    @Override
    public void transform(DbAttributeBinding[] bindings) {

        int len = positions.length;

        for (int i = 0; i < len; i++) {
            DbAttributeBinding b = bindings[positions[i]];
            Object transformed = transformers[i].encrypt(encryptor, b.getValue());
            b.setValue(transformed);

            ExtendedType extendedType = transformed != null
                    ? extendedTypeMap.getRegisteredType(transformed.getClass())
                    : extendedTypeMap.getDefaultType();

            b.setExtendedType(extendedType);
        }
    }

}