All Downloads are FREE. Search and download functionalities are using the official Maven repository.
  • Log In
  • Register

    • org.fastnate.generator.statements.PrimitiveColumnExpression Maven / Gradle / Ivy

    The newest version!
    package org.fastnate.generator.statements;

import java.util.function.Function;

import org.fastnate.generator.dialect.GeneratorDialect;

import lombok.Getter;
import lombok.RequiredArgsConstructor;

/**
 * A {@link ColumnExpression} which contains a primitive value.
 *
 * @author Tobias Liefke
 * @param 
 *            the type of the primitive value
 */
@Getter
@RequiredArgsConstructor
public class PrimitiveColumnExpression implements ColumnExpression {

	/** Represents an expression of a {@code null} value. */
	public static final PrimitiveColumnExpression NULL = new PrimitiveColumnExpression<>(null, t -> "null");

	/**
	 * Creates a new instance of {@link PrimitiveColumnExpression} for a number.
	 *
	 * @param value
	 *            the number value
	 * @param dialect
	 *            the dialect of the current database
	 * @return the new expression
	 */
	public static final  PrimitiveColumnExpression create(final N value,
			final GeneratorDialect dialect) {
		return new PrimitiveColumnExpression<>(value, value, dialect::convertNumberValue);
	}

	/**
	 * Creates a new instance of a {@link PrimitiveColumnExpression} for a string.
	 *
	 * @param value
	 *            the string value
	 * @param dialect
	 *            the dialect of the current database
	 * @return the new expression
	 */
	public static final PrimitiveColumnExpression create(final String value, final GeneratorDialect dialect) {
		return new PrimitiveColumnExpression<>(value, value, dialect::quoteString);
	}

	/** The original primitive value. */
	private final T value;

	/** The primitive database value (which may be used in an prepared statement). */
	private final T databaseValue;

	/** Converts the primitive value to an SQL string. */
	private final Function converter;

	/**
	 * Creates a new instance of an expression where the original value is the database value.
	 *
	 * @param value
	 *            the primitive value
	 * @param converter
	 *            converts the primitive value to an SQL string
	 */
	public PrimitiveColumnExpression(final T value, final Function converter) {
		this(value, value, converter);
	}

	@Override
	public String toSql() {
		return this.converter.apply(this.value);
	}

	@Override
	public String toString() {
		return toSql();
	}

}
    
    
    
    

    




    
    
    © 2015 - 2025 Weber Informatics LLC | Privacy Policy