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Added helper function for debugging SQL queries during development

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It is often helpful during debugging to be able to dump the contents
of an SQL result `Cursor` to the debug watch list. This is difficult
to do under normal circumstances. This adds a utility method really
only designed to be used during interactive debugging, which will do
its best to build a `Map` for each row in the `Cursor`. This can then
be used to test queries while the debugger is paused.
This commit is contained in:
Peter Serwylo 2016-09-28 22:57:40 +10:00
parent 97cf69341a
commit 45f9379fee
1 changed files with 55 additions and 0 deletions
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55
app/src/main/java/org/fdroid/fdroid/Utils.java
View File

@ -20,10 +20,12 @@ package org.fdroid.fdroid;
import android.content.Context;
import android.content.pm.PackageManager;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.net.Uri;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.annotation.RequiresApi;
import android.text.Editable;
import android.text.Html;
import android.text.TextUtils;
@ -49,6 +51,7 @@ import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.nio.charset.Charset;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.security.cert.Certificate;
@ -56,9 +59,13 @@ import java.security.cert.CertificateEncodingException;
import java.text.DateFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.Formatter;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
public final class Utils {
@ -541,4 +548,52 @@ public final class Utils {
return versionName;
}
/**
* Useful for debugging during development, so that arbitrary queries can be made, and their
* results inspected in the debugger.
*/
@SuppressWarnings("unused")
@RequiresApi(api = 11)
public static List<Map<String, String>> dumpCursor(Cursor cursor) {
List<Map<String, String>> data = new ArrayList<>();
if (cursor == null) {
return data;
}
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
Map<String, String> row = new HashMap<>(cursor.getColumnCount());
for (String col : cursor.getColumnNames()) {
int i = cursor.getColumnIndex(col);
switch (cursor.getType(i)) {
case Cursor.FIELD_TYPE_NULL:
row.put(col, null);
break;
case Cursor.FIELD_TYPE_INTEGER:
row.put(col, Integer.toString(cursor.getInt(i)));
break;
case Cursor.FIELD_TYPE_FLOAT:
row.put(col, Double.toString(cursor.getFloat(i)));
break;
case Cursor.FIELD_TYPE_STRING:
row.put(col, cursor.getString(i));
break;
case Cursor.FIELD_TYPE_BLOB:
row.put(col, new String(cursor.getBlob(i), Charset.defaultCharset()));
break;
}
}
data.add(row);
cursor.moveToNext();
}
cursor.close();
return data;
}
}