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Fluent Android library to build SQLite select statements

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package com.reinaldoarrosi.android.querybuilder;

import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.List;

import org.joda.time.LocalDate;
import org.joda.time.LocalDateTime;
import org.joda.time.format.DateTimeFormatter;

import com.reinaldoarrosi.android.querybuilder.sqlite.QueryBuildConfiguration;
import com.reinaldoarrosi.android.querybuilder.sqlite.projection.Projection;

public class Utils {
	public static final List EMPTY_LIST = new ArrayList();

	public static String toString(Object value) {
		if (value == null)
			return null;
		
		if (value instanceof String)
			return (String)value;
		else if (value instanceof Float)
			return new BigDecimal((Float) value).stripTrailingZeros().toPlainString();
		else if (value instanceof Double)
			return new BigDecimal((Double) value).stripTrailingZeros().toPlainString();
		else
			return String.valueOf(value);
	}
	
	public static String dateToString(LocalDate date, DateTimeFormatter format) {
		if (date == null)
			return null;
		
		if(format == null)
			format = QueryBuildConfiguration.current().getDateFormat();

		try {
			return date.toString(format);
		} catch (Exception e) {
			return null;
		}
	}

	public static String dateToString(LocalDateTime date, DateTimeFormatter format) {
		if (date == null)
			return null;

		if(format == null)
			format = QueryBuildConfiguration.current().getDateTimeFormat();
		
		try {
			return date.toString(format);
		} catch (Exception e) {
			return null;
		}
	}

	public static boolean isNullOrEmpty(String string) {
		return (string == null || string.length() <= 0);
	}
	
	public static boolean isNullOrWhiteSpace(String string) {
		return (string == null || string.trim().length() <= 0);
	}
	
	public static Projection[] buildColumnProjections(String... columns) {
		Projection[] projections = new Projection[columns.length];
		
		for (int i = 0; i < columns.length; i++) {
			projections[i] = Projection.column(columns[i]);
		}
		return projections;
	}
}
    

    

    

            

    

            



    
    






    
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