105 lines
3.5 KiB
Java
105 lines
3.5 KiB
Java
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/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.android.inputmethod.dictionarypack;
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import android.util.Log;
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/**
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* A class for various utility methods, especially debugging.
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*/
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public final class Utils {
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private final static String TAG = Utils.class.getSimpleName() + ":DEBUG --";
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private final static boolean DEBUG = DictionaryProvider.DEBUG;
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/**
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* Calls .toString() on its non-null argument or returns "null"
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* @param o the object to convert to a string
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* @return the result of .toString() or null
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*/
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public static String s(final Object o) {
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return null == o ? "null" : o.toString();
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}
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/**
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* Get the string representation of the current stack trace, for debugging purposes.
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* @return a readable, carriage-return-separated string for the current stack trace.
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*/
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public static String getStackTrace() {
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final StringBuilder sb = new StringBuilder();
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try {
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throw new RuntimeException();
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} catch (RuntimeException e) {
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StackTraceElement[] frames = e.getStackTrace();
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// Start at 1 because the first frame is here and we don't care about it
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for (int j = 1; j < frames.length; ++j) {
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sb.append(frames[j].toString() + "\n");
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}
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}
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return sb.toString();
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}
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/**
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* Get the stack trace contained in an exception as a human-readable string.
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* @param e the exception
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* @return the human-readable stack trace
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*/
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public static String getStackTrace(final Exception e) {
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final StringBuilder sb = new StringBuilder();
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final StackTraceElement[] frames = e.getStackTrace();
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for (int j = 0; j < frames.length; ++j) {
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sb.append(frames[j].toString() + "\n");
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}
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return sb.toString();
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}
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/**
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* Helper log method to ease null-checks and adding spaces.
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*
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* This sends all arguments to the log, separated by spaces. Any null argument is converted
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* to the "null" string. It uses a very visible tag and log level for debugging purposes.
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*
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* @param args the stuff to send to the log
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*/
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public static void l(final Object... args) {
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if (!DEBUG) return;
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final StringBuilder sb = new StringBuilder();
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for (final Object o : args) {
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sb.append(s(o).toString());
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sb.append(" ");
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}
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Log.e(TAG, sb.toString());
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}
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/**
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* Helper log method to put stuff in red.
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*
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* This does the same as #l but prints in red
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*
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* @param args the stuff to send to the log
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*/
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public static void r(final Object... args) {
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if (!DEBUG) return;
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final StringBuilder sb = new StringBuilder("\u001B[31m");
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for (final Object o : args) {
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sb.append(s(o).toString());
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sb.append(" ");
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}
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sb.append("\u001B[0m");
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Log.e(TAG, sb.toString());
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}
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}
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