AndroidAPS/app/src/main/java/info/nightscout/utils/JSONFormatter.java

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package info.nightscout.utils;
import android.text.Html;
import android.text.Spanned;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
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import java.util.Iterator;
/**
* Created by mike on 11.07.2016.
*/
public class JSONFormatter {
private static Logger log = LoggerFactory.getLogger(JSONFormatter.class);
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public static Spanned format(final String jsonString) {
final JsonVisitor visitor = new JsonVisitor(4, ' ');
try {
if (jsonString.equals("undefined"))
return Html.fromHtml("undefined");
else if (jsonString.getBytes()[0] == '[')
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return Html.fromHtml(visitor.visit(new JSONArray(jsonString), 0));
else
return Html.fromHtml(visitor.visit(new JSONObject(jsonString), 0));
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} catch (JSONException e) {
log.error("Unhandled exception", e);
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return Html.fromHtml("");
}
}
public static Spanned format(final JSONObject object) {
final JsonVisitor visitor = new JsonVisitor(4, ' ');
try {
return Html.fromHtml(visitor.visit(object, 0));
} catch (JSONException e) {
log.error("Unhandled exception", e);
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return Html.fromHtml("");
}
}
private static class JsonVisitor {
private final int indentationSize;
private final char indentationChar;
public JsonVisitor(final int indentationSize, final char indentationChar) {
this.indentationSize = indentationSize;
this.indentationChar = indentationChar;
}
private String visit(final JSONArray array, final int indent) throws JSONException {
String ret = "";
final int length = array.length();
if (length == 0) {
} else {
ret += write("[", indent);
for (int i = 0; i < length; i++) {
ret += visit(array.get(i), indent + 1);
}
ret += write("]", indent);
}
return ret;
}
private String visit(final JSONObject obj, final int indent) throws JSONException {
String ret = "";
final int length = obj.length();
if (length == 0) {
} else {
final Iterator<String> keys = obj.keys();
while (keys.hasNext()) {
final String key = keys.next();
ret += write("<b>" + key + "</b>: ", indent + 1);
ret += visit(obj.get(key), 0);
ret += "<br>";
}
}
return ret;
}
private String visit(final Object object, final int indent) throws JSONException {
String ret = "";
if (object instanceof JSONArray) {
ret += visit((JSONArray) object, indent);
} else if (object instanceof JSONObject) {
ret += visit((JSONObject) object, indent);
} else {
if (object instanceof String) {
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ret += write("\"" + ((String) object).replace("<", "&lt;").replace(">", "&gt;") + "\"", indent);
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} else {
ret += write(String.valueOf(object), indent);
}
}
return ret;
}
private String write(final String data, final int indent) {
String ret = "";
for (int i = 0; i < (indent * indentationSize); i++) {
ret += indentationChar;
}
ret += data;
return ret;
}
}
}