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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
package org.mozilla.gecko.background.db;
import android.database.Cursor;
/**
* A utility for dumping a cursor the debug log.
* <p>
* <b>For debugging only!</p>
*/
public class CursorDumper {
protected static String fixedWidth(int width, String s) {
if (s == null) {
return spaces(width);
}
int length = s.length();
if (width == length) {
return s;
}
if (width > length) {
return s + spaces(width - length);
}
return s.substring(0, width);
}
protected static String spaces(int i) {
return " ".substring(0, i);
}
protected static String dashes(int i) {
return "-------------------------------------".substring(0, i);
}
/**
* Dump a cursor to the debug log, ignoring any log level settings.
* <p>
* The position in the cursor is maintained. Caller is responsible for opening
* and closing cursor.
*
* @param cursor
* to dump.
*/
public static void dumpCursor(Cursor cursor) {
dumpCursor(cursor, 18, "records");
}
/**
* Dump a cursor to the debug log, ignoring any log level settings.
* <p>
* The position in the cursor is maintained. Caller is responsible for opening
* and closing cursor.
*
* @param cursor
* to dump.
* @param columnWidth
* how many characters per cursor column.
* @param tags
* a descriptor, printed like "(10 tags)", in the header row.
*/
protected static void dumpCursor(Cursor cursor, int columnWidth, String tags) {
int originalPosition = cursor.getPosition();
try {
String[] columnNames = cursor.getColumnNames();
int columnCount = cursor.getColumnCount();
for (int i = 0; i < columnCount; ++i) {
System.out.print(fixedWidth(columnWidth, columnNames[i]) + " | ");
}
System.out.println("(" + cursor.getCount() + " " + tags + ")");
for (int i = 0; i < columnCount; ++i) {
System.out.print(dashes(columnWidth) + " | ");
}
System.out.println("");
if (!cursor.moveToFirst()) {
System.out.println("EMPTY");
return;
}
cursor.moveToFirst();
while (!cursor.isAfterLast()) {
for (int i = 0; i < columnCount; ++i) {
System.out.print(fixedWidth(columnWidth, cursor.getString(i)) + " | ");
}
System.out.println("");
cursor.moveToNext();
}
for (int i = 0; i < columnCount-1; ++i) {
System.out.print(dashes(columnWidth + 3));
}
System.out.print(dashes(columnWidth + 3 - 1));
System.out.println("");
} finally {
cursor.moveToPosition(originalPosition);
}
}
}
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