package pl.wroc.pwr.string;

import pl.wroc.pwr.IOperator;
import pl.wroc.pwr.system.Consts;

public class StringLengthEqualizer implements IOperator< String > {

	private String text;
	private int requiredLength;
	
	public StringLengthEqualizer( String text, int requiredLength ) {
		this.text = text;
		this.requiredLength = requiredLength;
	}
	
	public String apply() {
		int textLength = this.text.length( );
		
		String output = this.text;
		if ( textLength > this.requiredLength ) {
			output = output.substring( 0, this.requiredLength );
		}
		int delta = this.requiredLength - textLength;
		while ( delta > 0 ) {
			output = Consts.BLANK + output;
			delta--;
		}
		return output;
	}

}