| /* |
| * Copyright (C) 2013 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.jill.frontend.java; |
| |
| import com.android.jill.backend.jayce.JayceWriter; |
| |
| import org.objectweb.asm.tree.ClassNode; |
| import org.objectweb.asm.tree.FieldNode; |
| |
| import java.io.IOException; |
| |
| import javax.annotation.CheckForNull; |
| import javax.annotation.Nonnegative; |
| import javax.annotation.Nonnull; |
| |
| /** |
| * This writer handles source info writing context. |
| */ |
| public class SourceInfoWriter { |
| |
| @Nonnull |
| protected final JayceWriter writer; |
| |
| /* debug infos */ |
| @Nonnegative |
| private static final int NO_START_LINE = 0; |
| |
| @Nonnegative |
| private static final int NO_END_LINE = 0; |
| |
| private static final int NO_START_COLUMN = -1; |
| |
| private static final int NO_END_COLUMN = -1; |
| |
| private static final String NO_FILENAME = null; |
| |
| @CheckForNull |
| private String currentFileName; |
| |
| @Nonnegative |
| private int currentLineNumber; |
| |
| public SourceInfoWriter(JayceWriter writer) { |
| this.writer = writer; |
| } |
| |
| public void writeDebugBegin(@Nonnull ClassNode cn) throws IOException { |
| writeDebugBegin(cn, NO_START_LINE); |
| } |
| |
| public void writeDebugBegin(@Nonnull ClassNode cn, @Nonnull FieldNode fn) |
| throws IOException { |
| writeUnknwonDebugBegin(); |
| } |
| |
| public void writeDebugBegin(@Nonnull ClassNode cn, int startLine) |
| throws IOException { |
| if (cn.sourceFile == null) { |
| writeUnknwonDebugBegin(); |
| } else { |
| writeDebugBeginInternal(cn.sourceFile, startLine); |
| } |
| } |
| |
| public void writeUnknwonDebugBegin() throws IOException { |
| writeDebugBeginInternal(NO_FILENAME, NO_START_LINE); |
| } |
| |
| private void writeDebugBeginInternal(@Nonnull String sourceFile, int startLine) |
| throws IOException { |
| writeFileNameIfDifferentFromCurrent(sourceFile); |
| writeLineIfDifferentFromCurrent(startLine, true); |
| } |
| |
| public void writeDebugEnd(@Nonnull ClassNode cn) |
| throws IOException { |
| writeDebugEnd(cn, NO_END_LINE); |
| } |
| |
| public void writeDebugEnd(@Nonnull ClassNode cn, @Nonnull FieldNode fn) |
| throws IOException { |
| writeUnknownDebugEnd(); |
| } |
| |
| public void writeDebugEnd(@Nonnull ClassNode cn, int endLine) throws IOException { |
| if (cn.sourceFile == null) { |
| writeUnknownDebugEnd(); |
| } else { |
| writeLineIfDifferentFromCurrent(endLine, false); |
| } |
| } |
| |
| public void writeUnknownDebugEnd() throws IOException { |
| writeLineIfDifferentFromCurrent(NO_END_LINE, false); |
| } |
| |
| private void writeFileNameIfDifferentFromCurrent(@CheckForNull String fileName) |
| throws IOException { |
| if (fileName != null && !fileName.equals(currentFileName)) { |
| writeCurrentFileName(fileName); |
| } |
| // Assume that elements with unknown debug infos are in same file. |
| } |
| |
| private void writeCurrentFileName(@Nonnull String fileName) |
| throws IOException { |
| writer.writeFileName(fileName); |
| currentFileName = fileName; |
| } |
| |
| private void writeLineIfDifferentFromCurrent(@Nonnegative int lineNumber, |
| boolean isStartLine) |
| throws IOException { |
| if (lineNumber != currentLineNumber) { |
| writeCurrentLine(lineNumber); |
| } |
| } |
| |
| private void writeCurrentLine(@Nonnegative int lineNumber) |
| throws IOException { |
| writer.writeCurrentLineInfo(lineNumber); |
| currentLineNumber = lineNumber; |
| } |
| } |