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This library allows your Java program to interface very easily with the Python world. It uses the Pyro protocol to call methods on remote objects. (See https://pyro5.readthedocs.io/). Pyrolite only implements part of the client side Pyro library, hence its name 'lite'... So if you don't need Pyro's full feature set, Pyrolite may be a good choice to connect java or .NET and python. Version 5.0 changes: support Pyro5 wire protocol. Dropped support of Pyro4 (stick to version 4.xx for that).

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package net.razorvine.pickle;

import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.StringWriter;
import java.text.DateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collection;
import java.util.Collections;
import java.util.Locale;
import java.util.Map;
import java.util.Set;

/**
 * Object output pretty printing, to help with the test scripts.
 * Nothing fancy, just a simple readable output format for a handfull of classes.
 * 
 * @author Irmen de Jong ([email protected])
 */
public class PrettyPrint {

	/***
	 * Prettyprint into a string, no type header.
	 */
	public static String printToStr(Object o) {
		StringWriter sw=new StringWriter();
		try {
			print(o,sw,false);
		} catch (IOException e) {
			sw.write("<>");
		}
		return sw.toString().trim();
	}
	
	/**
	 * Prettyprint directly to the standard output.
	 */
	public static void print(Object o) throws IOException {
		OutputStreamWriter w=new OutputStreamWriter(System.out,"UTF-8");
		print(o, w, true);
		w.flush();
	}
	
	/**
	 * Prettyprint the object to the outputstream. (UTF-8 output encoding is used)
	 */
	public static void print(Object o, OutputStream outs, boolean typeheader) throws IOException {
		OutputStreamWriter w=new OutputStreamWriter(outs,"UTF-8");
		print(o,w,typeheader);
		w.flush();
	}
	
	/**
	 * Prettyprint the object to the writer.
	 */
	public static void print(Object o, java.io.Writer writer, boolean typeheader) throws IOException {
		if (o == null) {
			if(typeheader) writer.write("null object\n");
			writer.write("null\n");
			writer.flush();
			return;
		}

		Class arraytype = o.getClass().getComponentType();
		if (arraytype != null) {
			if(typeheader) writer.write("array of " + arraytype+"\n");
			if (!arraytype.isPrimitive()) {
				writer.write(Arrays.deepToString((Object[]) o));  writer.write("\n");
			} else if (arraytype.equals(Integer.TYPE)) {
				writer.write(Arrays.toString((int[]) o));  writer.write("\n");
			} else if (arraytype.equals(Double.TYPE)) {
				writer.write(Arrays.toString((double[]) o));  writer.write("\n");
			} else if (arraytype.equals(Boolean.TYPE)) {
				writer.write(Arrays.toString((boolean[]) o));  writer.write("\n");
			} else if (arraytype.equals(Short.TYPE)) {
				writer.write(Arrays.toString((short[]) o));  writer.write("\n");
			} else if (arraytype.equals(Long.TYPE)) {
				writer.write(Arrays.toString((long[]) o));  writer.write("\n");
			} else if (arraytype.equals(Float.TYPE)) {
				writer.write(Arrays.toString((float[]) o));  writer.write("\n");
			} else if (arraytype.equals(Character.TYPE)) {
				writer.write(Arrays.toString((char[]) o));  writer.write("\n");
			} else if (arraytype.equals(Byte.TYPE)) {
				writer.write(Arrays.toString((byte[]) o));  writer.write("\n");
			} else {
				writer.write("?????????\n");
			}
		} else if (o instanceof Set) {
			@SuppressWarnings("unchecked")
			Set