# Cast.java

    package org.codefilarete.stalactite.query.model.operator;

    import org.codefilarete.stalactite.query.model.Selectable;
    import org.codefilarete.stalactite.sql.ddl.Size;

    /**
     * Implementation of cast SQL function
     *
     * @author Guillaume Mary
     */
    public class Cast<V, O> extends SQLFunction<V, O> {

    	private final Size typeSize;

    	/**
    	 * @param expression statement to be cast to given type
    	 * @param castType Java type used to find SQL cast type through {@link org.codefilarete.stalactite.sql.Dialect} type mapping
    	 */
    	public Cast(String expression, Class<O> castType) {
    		super("cast", castType, (V) expression);
    		this.typeSize = null;
    	}

    	/**
    	 * @param casted column to be cast to given type
    	 * @param castType Java type used to find SQL cast type through {@link org.codefilarete.stalactite.sql.Dialect} type mapping
    	 */
    	public Cast(Selectable<?> casted, Class<O> castType) {
    		this(casted, castType, null);
    	}

    	/**
    	 * @param casted column to be cast to given type
    	 * @param castType Java type used to find SQL cast type through {@link org.codefilarete.stalactite.sql.Dialect} type mapping
    	 * @param typeSize to be used in case of type requiring a size
    	 */
    	public Cast(Selectable<?> casted, Class<O> castType, Size typeSize) {
    		super("cast", castType, (V) casted);
    		this.typeSize = typeSize;
    	}

    	public Size getTypeSize() {
    		return typeSize;
    	}
    }