org.json.simple.JSONValue.java Source code

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Here is the source code for org.json.simple.JSONValue.java

Source

package org.json.simple;

import java.io.IOException;
import java.io.Reader;
import java.io.StringReader;
import java.io.Writer;
import java.util.List;
import java.util.Map;

import org.json.simple.parser.JSONParser;
import org.json.simple.parser.ParseException;

public class JSONValue {

    public static Object parse(Reader in) {
        try {
            JSONParser parser = new JSONParser();
            return parser.parse(in);
        } catch (Exception e) {
            return null;
        }
    }

    public static Object parse(String s) {
        StringReader in = new StringReader(s);
        return parse(in);
    }

    public static Object parseWithException(Reader in) throws IOException, ParseException {
        JSONParser parser = new JSONParser();
        return parser.parse(in);
    }

    public static Object parseWithException(String s) throws ParseException {
        JSONParser parser = new JSONParser();
        return parser.parse(s);
    }

    public static void writeJSONString(Object value, Writer out) throws IOException {
        if (value == null) {
            out.write("null");
            return;
        }

        if (value instanceof String) {
            out.write('\"');
            out.write(escape((String) value));
            out.write('\"');
            return;
        }

        if (value instanceof Double) {
            if (((Double) value).isInfinite() || ((Double) value).isNaN()) {
                out.write("null");
            } else {
                out.write(value.toString());
            }
            return;
        }

        if (value instanceof Float) {
            if (((Float) value).isInfinite() || ((Float) value).isNaN()) {
                out.write("null");
            } else {
                out.write(value.toString());
            }
            return;
        }

        if (value instanceof Number) {
            out.write(value.toString());
            return;
        }

        if (value instanceof Boolean) {
            out.write(value.toString());
            return;
        }

        if ((value instanceof JSONStreamAware)) {
            ((JSONStreamAware) value).writeJSONString(out);
            return;
        }

        if ((value instanceof JSONAware)) {
            out.write(((JSONAware) value).toJSONString());
            return;
        }

        if (value instanceof Map) {
            JSONObject.writeJSONString((Map) value, out);
            return;
        }

        if (value instanceof List) {
            JSONArray.writeJSONString((List) value, out);
            return;
        }

        out.write(value.toString());
    }

    public static String toJSONString(Object value) {
        if (value == null) {
            return "null";
        }

        if (value instanceof String) {
            return "\"" + escape((String) value) + "\"";
        }

        if (value instanceof Double) {
            if (((Double) value).isInfinite() || ((Double) value).isNaN()) {
                return "null";
            } else {
                return value.toString();
            }
        }

        if (value instanceof Float) {
            if (((Float) value).isInfinite() || ((Float) value).isNaN()) {
                return "null";
            } else {
                return value.toString();
            }
        }

        if (value instanceof Number) {
            return value.toString();
        }

        if (value instanceof Boolean) {
            return value.toString();
        }

        if ((value instanceof JSONAware)) {
            return ((JSONAware) value).toJSONString();
        }

        if (value instanceof Map) {
            return JSONObject.toJSONString((Map) value);
        }

        if (value instanceof List) {
            return JSONArray.toJSONString((List) value);
        }

        return value.toString();
    }

    public static String escape(String s) {
        if (s == null) {
            return null;
        }
        StringBuffer sb = new StringBuffer();
        escape(s, sb);
        return sb.toString();
    }

    static void escape(String s, StringBuffer sb) {
        for (int i = 0; i < s.length(); i++) {
            char ch = s.charAt(i);
            switch (ch) {
            case '"':
                sb.append("\\\"");
                break;
            case '\\':
                sb.append("\\\\");
                break;
            case '\b':
                sb.append("\\b");
                break;
            case '\f':
                sb.append("\\f");
                break;
            case '\n':
                sb.append("\\n");
                break;
            case '\r':
                sb.append("\\r");
                break;
            case '\t':
                sb.append("\\t");
                break;
            case '/':
                sb.append("\\/");
                break;
            default:
                //Reference: http://www.unicode.org/versions/Unicode5.1.0/
                if ((ch >= '\u0000' && ch <= '\u001F') || (ch >= '\u007F' && ch <= '\u009F')
                        || (ch >= '\u2000' && ch <= '\u20FF')) {
                    String ss = Integer.toHexString(ch);
                    sb.append("\\u");
                    for (int k = 0; k < 4 - ss.length(); k++) {
                        sb.append('0');
                    }
                    sb.append(ss.toUpperCase());
                } else {
                    sb.append(ch);
                }
            }
        } //for
    }
}