org.apache.qpid.messaging.util.PyPrint Maven / Gradle / Ivy
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.messaging.util;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
/**
* PyPrint
*
*/
public class PyPrint
{
private PyPrint()
{
}
public static String pprint(Object obj)
{
if (obj instanceof Map)
{
return pprint_map((Map) obj);
}
else if (obj instanceof List)
{
return pprint_list((List) obj);
}
else if (obj instanceof String)
{
return pprint_string((String) obj);
}
else if (obj instanceof Boolean)
{
return ((Boolean) obj).booleanValue() ? "True" : "False";
}
else if (obj == null)
{
return "None";
}
else
{
return obj.toString();
}
}
private static String indent(String st)
{
return " " + st.replace("\n", "\n ");
}
private static String pprint_map(Map map)
{
List items = new ArrayList();
for (Map.Entry me : map.entrySet())
{
items.add(String.format("%s: %s", pprint(me.getKey()),
pprint(me.getValue())));
}
Collections.sort(items);
return pprint_items("{", items, "}");
}
private static String pprint_list(List list)
{
List items = new ArrayList();
for (Object o : list)
{
items.add(pprint(o));
}
return pprint_items("[", items, "]");
}
private static String pprint_items(String start, List items,
String end)
{
StringBuilder result = new StringBuilder();
for (String item : items)
{
if (result.length() > 0)
{
result.append(",\n");
}
result.append(indent(item));
}
if (result.length() > 0)
{
return String.format("%s\n%s\n%s", start, result, end);
}
else
{
return String.format("%s%s", start, end);
}
}
private static String pprint_string(String st)
{
StringBuilder result = new StringBuilder();
result.append('\'');
for (int i = 0; i < st.length(); i++)
{
char c = st.charAt(i);
switch (c)
{
case '\'':
result.append("\\'");
break;
case '\n':
result.append("\\n");
break;
default:
if (c >= 0x80)
{
result.append(String.format("\\u%04x", (int)c));
}
else
{
result.append(c);
}
break;
}
}
result.append('\'');
return result.toString();
}
}