/*
 *  ******************************************************************************
 *  *
 *  *
 *  * This program and the accompanying materials are made available under the
 *  * terms of the Apache License, Version 2.0 which is available at
 *  * https://www.apache.org/licenses/LICENSE-2.0.
 *  *
 *  *  See the NOTICE file distributed with this work for additional
 *  *  information regarding copyright ownership.
 *  * 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
 *  * under the License.
 *  *
 *  * SPDX-License-Identifier: Apache-2.0
 *  *****************************************************************************
 */

package org.datavec.api.transform.transform.string;

import lombok.Data;
import org.datavec.api.transform.metadata.ColumnMetaData;
import org.datavec.api.transform.metadata.StringMetaData;
import org.datavec.api.transform.transform.BaseColumnTransform;
import org.datavec.api.writable.Text;
import org.datavec.api.writable.Writable;
import org.nd4j.shade.jackson.annotation.JsonIgnoreProperties;
import org.nd4j.shade.jackson.annotation.JsonProperty;

@JsonIgnoreProperties({"inputSchema", "columnNumber"})
@Data
public class AppendStringColumnTransform extends BaseColumnTransform {

    private String toAppend;

    public AppendStringColumnTransform(@JsonProperty("columnName") String columnName, @JsonProperty("toAppend") String toAppend) {
        super(columnName);
        this.toAppend = toAppend;
    }

    @Override
    public ColumnMetaData getNewColumnMetaData(String newName, ColumnMetaData oldColumnType) {
        return new StringMetaData(newName); //Output after transform: String (Text)
    }

    @Override
    public Writable map(Writable columnWritable) {
        return new Text(columnWritable + toAppend);
    }

    @Override
    public String toString() {
        return "AppendStringColumnTransform(append=\"" + toAppend + "\")";
    }

    /**
     * Transform an object
     * in to another object
     *
     * @param input the record to transform
     * @return the transformed writable
     */
    @Override
    public Object map(Object input) {
        return input.toString() + toAppend;
    }
}
