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/*******************************************************************************
* Copyright 2014 Univocity Software Pty Ltd
*
* Licensed 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 under the License.
******************************************************************************/
package com.univocity.parsers.common.processor;
import com.univocity.parsers.common.*;
import com.univocity.parsers.conversions.*;
/**
*
* A {@link RowWriterProcessor} implementation for executing conversion sequences in object arrays before for writing them using any implementation of {@link AbstractWriter}.
*
* @see AbstractWriter
* @see RowWriterProcessor
*
* @author Univocity Software Pty Ltd - [email protected]
*
*/
public class ObjectRowWriterProcessor extends DefaultConversionProcessor implements RowWriterProcessor {
private NormalizedString[] normalizedHeaders;
private String[] previousHeaders;
/**
* Executes the sequences of conversions defined using {@link DefaultConversionProcessor#convertFields(Conversion...)}, {@link DefaultConversionProcessor#convertIndexes(Conversion...)} and {@link DefaultConversionProcessor#convertAll(Conversion...)}, for every field in the given row.
*
* Each field will be transformed using the {@link Conversion#execute(Object)} method.
*
In general the conversions will process a String and convert it to some object value (such as booleans, dates, etc).
*
* @param input the object array that represents a record with its individual fields.
* @param headers All field names used to produce records in a given destination. May be null if no headers have been defined in {@link CommonSettings#getHeaders()}
* @param indexesToWrite The indexes of the headers that are actually being written. May be null if no fields have been selected using {@link CommonSettings#selectFields(String...)} or {@link CommonSettings#selectIndexes(Integer...)}
* @return an row of Object instances containing the values obtained after the execution of all conversions.
*
Fields that do not have any conversion defined will just be copied to the object array into their original positions.
*/
public Object[] write(Object[] input, String[] headers, int[] indexesToWrite) {
if (previousHeaders != headers) {
previousHeaders = headers;
normalizedHeaders = NormalizedString.toArray(headers);
}
return write(input, normalizedHeaders, indexesToWrite);
}
/**
* Executes the sequences of conversions defined using {@link DefaultConversionProcessor#convertFields(Conversion...)}, {@link DefaultConversionProcessor#convertIndexes(Conversion...)} and {@link DefaultConversionProcessor#convertAll(Conversion...)}, for every field in the given row.
*
*
Each field will be transformed using the {@link Conversion#execute(Object)} method.
*
In general the conversions will process a String and convert it to some object value (such as booleans, dates, etc).
*
* @param input the object array that represents a record with its individual fields.
* @param headers All field names used to produce records in a given destination. May be null if no headers have been defined in {@link CommonSettings#getHeaders()}
* @param indexesToWrite The indexes of the headers that are actually being written. May be null if no fields have been selected using {@link CommonSettings#selectFields(String...)} or {@link CommonSettings#selectIndexes(Integer...)}
* @return an row of Object instances containing the values obtained after the execution of all conversions.
*
Fields that do not have any conversion defined will just be copied to the object array into their original positions.
*/
@Override
public Object[] write(Object[] input, NormalizedString[] headers, int[] indexesToWrite) {
if (input == null) {
return null;
}
Object[] output = new Object[input.length];
System.arraycopy(input, 0, output, 0, input.length);
if (reverseConversions(false, output, headers, indexesToWrite)) {
return output;
}
return null;
}
}