Example usage for javax.persistence AttributeConverter convertToDatabaseColumn

Introduction

In this page you can find the example usage for javax.persistence AttributeConverter convertToDatabaseColumn.

Prototype

public Y convertToDatabaseColumn(X attribute);

Source Link

Document

Converts the value stored in the entity attribute into the data representation to be stored in the database.

Usage

From source file:io.stallion.dataAccess.db.DB.java

/**
 * Trys to convert java type into what is needed by JDBC to store to the database.
 *
 * @param o/*w w w  .  j  ava2  s  .  co m*/
 * @param col
 * @param arg
 * @return
 */
public Object convertColumnArg(Model o, Col col, Object arg) {

    if (arg == null && col.getDefaultValue() != null) {
        arg = col.getDefaultValue();
    }
    if (col.getAttributeConverter() != null) {
        arg = col.getAttributeConverter().convertToDatabaseColumn(arg);
    } else if (arg != null && !StringUtils.isBlank(col.getConverterClassName())) {
        AttributeConverter converter = this.getConverter(col.getConverterClassName());
        arg = converter.convertToDatabaseColumn(arg);
    } else if (arg instanceof LocalDateTime) {
        arg = new Timestamp(((LocalDateTime) arg).atZone(ZoneId.systemDefault()).toInstant().toEpochMilli());
    } else if (arg instanceof ZonedDateTime) {
        arg = new Timestamp(((ZonedDateTime) arg).toInstant().toEpochMilli());
    } else if (arg instanceof Enum) {
        return arg.toString();
    }
    return arg;
}

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From source file:org.kuali.rice.krad.data.jpa.Filter.java

/**
 * Uses the {@link Convert} converter to first translate the {@code attributeValue} to the desired type and then
 * convert it to the database format for searching.
 *
 * @param convert the conversion annotation.
 * @param attributeName the attribute name of the field to coerce.
 * @param attributeValue the value to coerce.
 * @return the coerced value./* www . jav  a 2  s.co m*/
 */
private static Object coerceConverterValue(Convert convert, String attributeName, String attributeValue) {
    try {
        AttributeConverter<Object, String> converter = (AttributeConverter<Object, String>) convert.converter()
                .newInstance();
        Object entityAttribute = converter.convertToEntityAttribute(attributeValue);
        return converter.convertToDatabaseColumn(entityAttribute);
    } catch (Exception e) {
        LOG.error("Could not create the converter for " + attributeName, e);
    }

    return attributeValue;
}

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