package com.oracle.truffle.tools.chromeinspector.types;
import java.io.PrintWriter;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import com.oracle.truffle.api.debug.DebugException;
import com.oracle.truffle.api.debug.DebugValue;
import com.oracle.truffle.api.nodes.LanguageInfo;
import com.oracle.truffle.tools.utils.json.JSONArray;
import com.oracle.truffle.tools.utils.json.JSONObject;
final class ObjectPreview {
private static final int OVERFLOW_LIMIT_PROPERTIES = 5;
private static final int OVERFLOW_LIMIT_ARRAY_ELEMENTS = 100;
private ObjectPreview() {
}
static JSONObject create(DebugValue debugValue, String type, String subtype, boolean allowToStringSideEffects, LanguageInfo language, PrintWriter err) {
JSONObject json = new JSONObject();
json.put("type", type);
json.put("subtype", subtype);
boolean isArray = debugValue.isArray();
DebugValue metaObject = RemoteObject.getMetaObject(debugValue, language, err);
String metaType = null;
if (metaObject != null) {
metaType = RemoteObject.toMetaName(metaObject, err);
if (isArray) {
metaType += "(" + debugValue.getArray().size() + ")";
}
}
json.putOpt("description", metaType);
boolean overflow;
JSONArray properties = new JSONArray();
if (isArray) {
List<DebugValue> array = debugValue.getArray();
int size = array.size();
overflow = size > OVERFLOW_LIMIT_ARRAY_ELEMENTS;
int n = Math.min(size, OVERFLOW_LIMIT_ARRAY_ELEMENTS);
for (int i = 0; i < n; i++) {
try {
properties.put(createPropertyPreview(array.get(i), allowToStringSideEffects, language, err));
} catch (DebugException ex) {
overflow = true;
break;
}
}
} else {
Collection<DebugValue> valueProperties = debugValue.getProperties();
if (valueProperties != null) {
Iterator<DebugValue> propertyIterator = valueProperties.iterator();
overflow = false;
while (propertyIterator.hasNext()) {
DebugValue property = propertyIterator.next();
if (!property.isInternal() && !property.hasReadSideEffects() && property.isReadable()) {
if (properties.length() == OVERFLOW_LIMIT_PROPERTIES) {
overflow = true;
break;
}
try {
properties.put(createPropertyPreview(property, allowToStringSideEffects, language, err));
} catch (DebugException ex) {
overflow = true;
break;
}
}
}
} else {
overflow = false;
}
}
json.put("overflow", overflow);
json.put("properties", properties);
return json;
}
private static JSONObject createPropertyPreview(DebugValue origProperty, boolean allowToStringSideEffects, LanguageInfo language, PrintWriter err) {
DebugValue property = origProperty;
if (language != null) {
property = property.asInLanguage(language);
}
JSONObject json = new JSONObject();
json.put("name", property.getName());
boolean isArray = property.isArray();
TypeInfo typeInfo = TypeInfo.fromValue(property, language, err);
json.put("type", typeInfo.type);
json.putOpt("subtype", typeInfo.subtype);
String value;
if (isArray) {
String size = "(" + property.getArray().size() + ")";
value = typeInfo.descriptionType != null ? typeInfo.descriptionType + size : size;
} else {
value = RemoteObject.toString(property, allowToStringSideEffects, err);
}
json.putOpt("value", value);
return json;
}
}