oms3.Conversions Maven / Gradle / Ivy
/*
* $Id:$
*
* This software is provided 'as-is', without any express or implied
* warranty. In no event will the authors be held liable for any damages
* arising from the use of this software.
*
* Permission is granted to anyone to use this software for any purpose,
* including commercial applications, and to alter it and redistribute it
* freely, subject to the following restrictions:
*
* 1. The origin of this software must not be misrepresented; you must not
* claim that you wrote the original software. If you use this software
* in a product, an acknowledgment in the product documentation would be
* appreciated but is not required.
*
* 2. Altered source versions must be plainly marked as such, and must not be
* misrepresented as being the original software.
*
* 3. This notice may not be removed or altered from any source
* distribution.
*/
package oms3;
import java.io.File;
import java.lang.reflect.Array;
import java.math.BigDecimal;
import java.net.MalformedURLException;
import java.net.URL;
import java.text.DateFormat;
import java.text.NumberFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Conversion Utilities. This class deals with conversion from string values
* to some known types.
*
* @author Olaf David
*/
public class Conversions {
/** Conversion SPI */
static private ServiceLoader convServices = ServiceLoader.load(ConversionProvider.class);
//
static final char LB = '{';
static final char RB = '}';
static final char SEP = ',';
static final Pattern pattern = Pattern.compile("(\\w+)\\s*(\\[[0-9]+\\])*?");
static final Pattern splitP = Pattern.compile(Character.toString(SEP));
public static boolean debug = false;
/** Some common date patters */
static private final String[] fmt = {
"yyyy-MM-dd'T'HH:mm:ss",
"yyyy-MM-dd'T'HH:mm",
"yyyy-MM-dd hh:mm",
"yyyy-MM-dd hh:mm:ss",
"yyyy-MM-dd", // ISO
"MM-dd-yyyy", // US
"MM/dd/yyyy",
"dd.MM.yyyy", // DE
"yyyy.MM.dd", // DE
"yyyy MM dd H m s" // MMS
};
public static class Params {
HashMap arg = new HashMap();
public void add(Class from, Class to, Object par) {
arg.put(key(from, to), par);
}
public Object get(Class from, Class to) {
return arg.get(key(from, to));
}
}
public static boolean canConvert(Class from, Class to) {
if (from == String.class && to.isArray()) {
return true;
}
// get it from the internal cache.new ArrayConverter((String) from).getArrayForType(to);
Converter c = co.get(key(from, to));
if (c == null) {
// service provider lookup
c = lookupConversionService(from, to);
if (c == null) {
return false;
}
}
return true;
}
// public static Params createDefault() {
// Params p = new Params();
// p.add(double.class, String.class, "10.5");
// return p;
// }
/** Convert a String value into an object of a certain type
*
* @param to the type to convert to
* @param from the value to convert
* @param arg conversion argument (e.g. Date format)
* @return the object of a certain type.
*/
public static T convert(Object from, Class to, Params arg) {
if (from == null) {
throw new NullPointerException("from");
}
if (to == null) {
throw new NullPointerException("to");
}
if (from.getClass() == String.class && to.isArray()) {
return new ArrayConverter((String) from).getArrayForType(to);
}
// get it from the internal cache.
@SuppressWarnings("unchecked")
Converter c = co.get(key(from.getClass(), to));
if (c == null) {
// service provider lookup
c = lookupConversionService(from.getClass(), to);
if (c == null) {
throw new ComponentException("No Converter: " + from + " (" + from.getClass() + ") -> " + to);
}
co.put(key(from.getClass(), to), c);
}
Object param = null;
if (arg != null) {
param = arg.get(from.getClass(), to);
}
return (T) c.convert(from, param);
}
public static T convert(Object from, Class to) {
return convert(from, to, null);
}
// SPI
/**
* Lookup a conversion service
*
* @param from
* @param to
* @return
*/
@SuppressWarnings("unchecked")
private static Converter lookupConversionService(Class from, Class to) {
for (ConversionProvider converter : convServices) {
Converter c = converter.getConverter(from, to);
if (c != null) {
return c;
}
}
return null;
}
/**
*
* @param src e.g test[1][3]
* @return [test,1,2]
*/
public static String[] parseArrayElement(String src) {
Matcher matcher = pattern.matcher(src.trim());
List a = new ArrayList();
while (matcher.find()) {
a.add(matcher.group(0));
}
return a.toArray(new String[0]);
}
/** Get the array base type
*
* @param array
* @return
*/
private static Class getArrayBaseType(Class array) {
while (array.isArray()) {
array = array.getComponentType();
}
return array;
}
/** ArrayConverter
*
*/
static class ArrayConverter {
String[] content;
String layout;
/* 10 dimensions max.*/
int[] dims = {-1, -1, -1, -1, -1, -1, -1, -1, -1, -1};
private int count(String s, char c) {
int count = 0;
int len = s.length();
for (int i = 0; i < len; i++) {
if (s.charAt(i) == c) {
count++;
}
}
return count;
}
ArrayConverter(String text) {
text = text.trim();
if (count(text, '}') != count(text, '}')) {
throw new IllegalArgumentException("Brackets mismatch.");
}
if (debug) {
System.out.println(text);
}
String mass = text.replace(LB, ' ').replace(RB, ' ').trim();
content = splitP.split(mass);
if (debug) {
System.out.println(mass.isEmpty());
System.out.println("content " + Arrays.toString(content));
}
layout = changed(text, mass.isEmpty() ? 0 : content.length);
if (debug) {
System.out.println("layout " + layout);
}
parseDims(layout);
}
private String changed(String inp, int len) {
StringBuilder c = new StringBuilder();
int count = 0;
int b = 0;
boolean first = true;
for (int i = 0; i < inp.length(); i++) {
char ch = inp.charAt(i);
switch (ch) {
case ' ':
break; // TODO, repect string quotes.
case LB:
case RB:
case SEP:
first = true;
c.append(ch);
break;
default:
if (first) {
c.append(count++);
first = false;
}
}
}
if (count != len) {
throw new IllegalArgumentException(count + "!=" + len);
}
return c.toString();
}
private Class[] types(int[] dims, Class basetype) {
int i = 0;
while (dims[i] > -1) {
i++;
}
if (debug) {
System.out.println(" rank " + i);
}
Class[] c = new Class[i];
c[i - 1] = basetype;
while (--i > 0) {
c[i - 1] = Array.newInstance(c[i], 0).getClass();
}
if (debug) {
System.out.println("Types " + java.util.Arrays.toString(c));
}
return c;
}
private void parseDims(String layout) {
for (int i = 0, level = -1; i < layout.length(); i++) {
char c = layout.charAt(i);
switch (c) {
case LB:
if (level == dims.length - 1) {
throw new UnsupportedOperationException("Can only handle arrays with length " + dims.length);
}
if (i > 0 && layout.charAt(i - 1) == LB) {
dims[level]++;
}
dims[++level] = 0;
break;
case RB:
level--;
break;
case SEP:
dims[level]++;
break;
default:
if (dims[level] == 0) {
dims[level]++;
}
}
}
if (debug) {
System.out.println("dims :" + Arrays.toString(dims));
}
}
@SuppressWarnings("unchecked")
T getArrayForType(Class type) {
if (!type.isArray()) {
throw new IllegalArgumentException("Not an array type");
}
Class cType = getArrayBaseType(type);
Object o = new Parser(co.get(key(String.class, cType))).parse(0, layout, types(dims, cType));
if (o.getClass() != type) {
throw new RuntimeException(o.getClass() + "!=" + type);
}
return (T) o;
}
/**
* Internal Parser.
*/
private class Parser {
int idx = 1;
Converter converter;
Parser(Converter converter) {
if (converter == null) {
throw new RuntimeException("cannot convert.");
}
this.converter = converter;
}
@SuppressWarnings("unchecked")
Object parse(int level, String layout, Class[] cc) {
int arridx = 0;
Object arr = Array.newInstance(cc[level], dims[level]);
while (idx < layout.length()) {
char c = layout.charAt(idx);
switch (c) {
case LB:
idx++;
Object elem = parse(level + 1, layout, cc);
// System.out.println("Adding Array " + elem + " to " + arr.getClass() + " at " + arridx);
System.out.flush();
Array.set(arr, arridx, elem);
break;
case RB:
return arr;
case SEP:
arridx++;
break;
default:
int index = 0;
while (Character.isDigit(layout.charAt(idx))) {
index = index * 10 + (layout.charAt(idx++) - '0');
}
idx--;
Object o = converter.convert(content[index], null);
try {
Array.set(arr, arridx, o);
} catch (IllegalArgumentException E) {
System.out.println(arr.getClass() + " element " + arridx + " " + o + " " + o.getClass());
throw E;
}
}
idx++;
}
return arr;
}
}
}
public static String formatISO(Date date) {
return ISO().format(date);
}
public static SimpleDateFormat ISO() {
return new SimpleDateFormat(fmt[3]);
}
/**
* parse the date using the formats above. This is thread safe.
*
* @param date
* @return
*/
private static Date parse(String date) {
for (int i = 0; i < fmt.length; i++) {
try {
SimpleDateFormat df = new SimpleDateFormat(fmt[i]);
return df.parse(date);
} catch (ParseException E) {
// keep trying
}
}
throw new IllegalArgumentException(date);
}
// DecimalFormat dfmt
private final static String key(Class from, Class to) {
return from.getName() + "->" + to.getName();
}
/**
* Converter table.
*/
@SuppressWarnings("serial")
private static Map co = new HashMap() {
@Override
public Converter put(String key, Converter value) {
Converter v = super.put(key, value);
if (v != null) {
throw new IllegalArgumentException("Duplicate Converter for " + key);
}
return v;
}
{
put(key(String.class, String.class), new Converter() {
@Override
public String convert(String s, Object arg) {
return s;
}
});
put(key(BigDecimal.class, Double.class), new Converter() {
@Override
public Double convert(BigDecimal s, Object arg) {
return s.doubleValue();
}
});
put(key(Integer.class, Double.class), new Converter() {
@Override
public Double convert(Integer s, Object arg) {
return s.doubleValue();
}
});
put(key(double[].class, String.class), new Converter() {
@Override
public String convert(double[] s, Object arg) {
StringBuilder b = new StringBuilder("{");
if (s.length > 0) {
for (int i = 0; i < s.length - 1; i++) {
b.append(s[i] + ", ");
}
b.append(s[s.length - 1]);
}
b.append("}");
return b.toString();
}
});
put(key(double[][].class, String.class), new Converter() {
@Override
public String convert(double[][] s, Object arg) {
StringBuilder b = new StringBuilder("{");
if (s.length > 0) {
for (int i = 0; i < s.length - 1; i++) {
b.append(Conversions.convert(s[i], String.class) + ", ");
}
b.append(Conversions.convert(s[s.length - 1], String.class));
}
b.append("}");
return b.toString();
}
});
put(key(int[].class, String.class), new Converter() {
@Override
public String convert(int[] s, Object arg) {
StringBuilder b = new StringBuilder("{");
if (s.length > 0) {
for (int i = 0; i < s.length - 1; i++) {
b.append(s[i] + ", ");
}
b.append(s[s.length - 1]);
}
b.append("}");
return b.toString();
}
});
put(key(int[][].class, String.class), new Converter() {
@Override
public String convert(int[][] s, Object arg) {
StringBuilder b = new StringBuilder("{");
if (s.length > 0) {
for (int i = 0; i < s.length - 1; i++) {
b.append(Conversions.convert(s[i], String.class) + ", ");
}
b.append(Conversions.convert(s[s.length - 1], String.class));
}
b.append("}");
return b.toString();
}
});
put(key(String.class, URL.class), new Converter() { // File
@Override
public URL convert(String s, Object arg) {
try {
return new URL(s);
} catch (MalformedURLException ex) {
throw new IllegalArgumentException(s, ex);
}
}
});
put(key(String.class, File.class), new Converter() { // File
@Override
public File convert(String s, Object arg) {
return new File(s);
}
});
put(key(String.class, Date.class), new Converter() { // File
@Override
public Date convert(String s, Object arg) {
if (arg instanceof DateFormat) {
try {
return ((DateFormat) arg).parse(s);
} catch (ParseException E) {
throw new RuntimeException(E);
}
}
return parse(s);
}
});
put(key(String.class, Calendar.class), new Converter() { // Calendar
@Override
public Calendar convert(String s, Object arg) {
Date d = null;
if (arg instanceof DateFormat) {
try {
d = ((DateFormat) arg).parse(s);
} catch (ParseException E) {
throw new RuntimeException(E);
}
} else {
d = parse(s);
}
Calendar cal = new GregorianCalendar();
cal.setTime(d);
return cal;
}
});
put(key(GregorianCalendar.class, String.class), new Converter() { // Calendar
@Override
public String convert(GregorianCalendar s, Object arg) {
if (arg instanceof DateFormat) {
return ((DateFormat) arg).format(s.getTime());
} else {
return ISO().format(s.getTime());
}
}
});
put(key(Double.class, String.class), new Converter() { // Double
@Override
public String convert(Double s, Object arg) {
if (arg instanceof NumberFormat) {
NumberFormat nf = (NumberFormat) arg;
return nf.format(s);
}
return s.toString();
}
});
put(key(Float.class, String.class), new Converter() { // Double
@Override
public String convert(Float s, Object arg) {
if (arg instanceof NumberFormat) {
NumberFormat nf = (NumberFormat) arg;
return nf.format(s);
}
return s.toString();
}
});
put(key(Integer.class, String.class), new Converter() { // Integer
@Override
public String convert(Integer s, Object arg) {
return s.toString();
}
});
put(key(String.class, BigDecimal.class), new Converter() { // File
@Override
public BigDecimal convert(String s, Object arg) {
return new BigDecimal(s.trim());
}
});
put(key(String.class, double.class), new Converter() { // double
@Override
public Double convert(String s, Object arg) {
return Double.parseDouble(s.trim());
}
});
put(key(String.class, Double.class), get(key(String.class, double.class)));
put(key(String.class, float.class), new Converter() { // float
@Override
public Float convert(String s, Object arg) {
return Float.parseFloat(s.trim());
}
});
put(key(String.class, Float.class), get(key(String.class, float.class)));
put(key(String.class, long.class), new Converter() { // long
@Override
public Long convert(String s, Object arg) {
return Long.parseLong(s.trim());
}
});
put(key(String.class, Long.class), get(key(String.class, long.class)));
put(key(String.class, int.class), new Converter() { // int
@Override
public Integer convert(String s, Object arg) {
return Integer.parseInt(s.trim());
}
});
put(key(String.class, Integer.class), get(key(String.class, int.class)));
put(key(String.class, short.class), new Converter() { // short
@Override
public Short convert(String s, Object arg) {
return Short.parseShort(s.trim());
}
});
put(key(String.class, Short.class), get(key(String.class, short.class)));
put(key(String.class, byte.class), new Converter() { // byte
@Override
public Byte convert(String s, Object arg) {
return Byte.parseByte(s.trim());
}
});
put(key(String.class, Byte.class), get(key(String.class, byte.class)));
put(key(boolean.class, String.class), new Converter() { // boolean
@Override
public String convert(Boolean s, Object arg) {
return s.toString();
}
});
put(key(Boolean.class, String.class), get(key(boolean.class, String.class)));
put(key(String.class, boolean.class), new Converter() { // boolean
@Override
public Boolean convert(String s, Object arg) {
return Boolean.parseBoolean(s.trim());
}
});
put(key(String.class, Boolean.class), get(key(String.class, boolean.class)));
put(key(String.class, char.class), new Converter() { // String
@Override
public Character convert(String s, Object arg) {
return s.trim().charAt(0);
}
});
put(key(String.class, Character.class), get(key(String.class, char.class)));
put(key(Integer.class, int.class), new Converter() { // byte
@Override
public Integer convert(Integer s, Object arg) {
return s;
}
});
put(key(Double.class, double.class), new Converter() { // double
@Override
public Double convert(Double s, Object arg) {
return s;
}
});
put(key(Float.class, float.class), new Converter() { // double
@Override
public Float convert(Float s, Object arg) {
return s;
}
});
put(key(Boolean.class, boolean.class), new Converter() { // byte
@Override
public Boolean convert(Boolean s, Object arg) {
return s;
}
});
// add more
}
};
public static void main(String[] args) throws ParseException {
String t = "t[10]";
System.out.println(Arrays.toString(Conversions.parseArrayElement(t)));
double a = 1231.2345672828288284;
System.out.println(String.format(Locale.US, "'%2.5f'", a));
// Formatter f = new Formatter();
// NumberFormat formatter = new DecimalFormat("#0.000");
// System.out.println(formatter.);
// System.out.println("1 " + Double.class.isAssignableFrom(Object.class));
// System.out.println("2 " + Object.class.isAssignableFrom(Double.class));
// System.out.println("3 " + Number.class.isAssignableFrom(Double.class));
// System.out.println("4 " + double.class.isAssignableFrom(Double.class));
// System.out.println("5 " + Double.class.isAssignableFrom(double.class));
// System.out.println("6 " + Double.class.getCanonicalName());
// System.out.println("7 " + Double.class.getName());
// System.out.println("8 " + Double.class.getSimpleName());
//
// Currency c = convert("USD", Currency.class);
// Color col = convert("ff0110", Color.class);
// System.out.println(c);
// System.out.println(col);
System.out.print(co.keySet());
}
//// String content = "{{ 333.345, 12.23}, {444.1, 222.4},{1.2, 3.4}}";
//// String content3 = "{{ 333.345, 12.23, 444.1},{ 222.4 , 1.2, 3.4}}";
//// String content1 = "{333.345, 12.23, 444.1, 222.4,1.2, 3.4}";
////// String content11 = "[333.345 12.23 444.1 222.4 1.2 3.4]";
// String b = "{{{333.345, 12.23},{444.1, 222.4},{1.2, 3.4}}}";
//
// String b = "{ 0.0, 0.0,0.0,0.1500000059605,0.0,0.0,0.0,0.0,0.0,0.1500000059605,0.8000000119209,0.0,0.05000000074506,0.6998999714851,0.0,0.660000026226,1.759899973869,0.0,0.2599000036716,0.01989999972284,1.799900054932,1.840000033379,1.700000047684,1.070000052452,0.6800000071526,3.72000002861,3.410000085831,0.140000000596,3.650000095367,1.659899950027,1.070000052452,0.5400000214577,3.059900045395,3.25,3.910000085831,1.44000005722,3.089900016785,1.870000004768,1.539899945259,1.460000038147,2.599900007248,1.090000033379,2.420000076294,2.259900093079,2.900000095367,1.129899978638,3.789900064468,3.799900054932,3.0,1.389899969101,5.159900188446,1.700000047684,1.330000042915,0.7400000095367,1.049900054932,1.809900045395,0.3898999989033,0.0,0.9300000071526,0.5,2.700000047684,0.0,0.1098999977112,0.5,0.0,1.200000047684,0.2599000036716,0.1199000030756}";
//
//// String c = "t1_est(1,2)";
//// System.out.println(Arrays.asList(parseArrayElement(c)));
//
// String c = "t1_est(1 ,2) ; basin; abc(1)";
//// System.out.println(Arrays.asList(parseArrayElement(c)));
//
// String t[] = c.split("\\s*;\\s*");
// for (String string : t) {
// System.out.println("string '" + string + "'");
// }
// //this is a comment
// //this is a comment
//
// Object arr = convert(b, double[][][].class);
// System.out.println(arr);
// System.out.println(java.util.Arrays.toString(((double[]) arr)));
////// System.out.println(Arrays.toString(((String[])new P(content1).getArray(String.class))));
// }
}
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