--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/langtools/src/jdk.jdeps/share/classes/com/sun/tools/javap/SourceWriter.java Wed May 27 13:25:18 2015 -0700
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation. Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package com.sun.tools.javap;
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.StringReader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Set;
+import java.util.SortedMap;
+import java.util.SortedSet;
+import java.util.TreeMap;
+import java.util.TreeSet;
+import javax.tools.JavaFileManager;
+import javax.tools.JavaFileManager.Location;
+import javax.tools.JavaFileObject;
+import javax.tools.StandardLocation;
+
+import com.sun.tools.classfile.Attribute;
+import com.sun.tools.classfile.ClassFile;
+import com.sun.tools.classfile.Code_attribute;
+import com.sun.tools.classfile.ConstantPoolException;
+import com.sun.tools.classfile.Instruction;
+import com.sun.tools.classfile.LineNumberTable_attribute;
+import com.sun.tools.classfile.SourceFile_attribute;
+
+
+/**
+ * Annotate instructions with source code.
+ *
+ * <p><b>This is NOT part of any supported API.
+ * If you write code that depends on this, you do so at your own risk.
+ * This code and its internal interfaces are subject to change or
+ * deletion without notice.</b>
+ */
+public class SourceWriter extends InstructionDetailWriter {
+ static SourceWriter instance(Context context) {
+ SourceWriter instance = context.get(SourceWriter.class);
+ if (instance == null)
+ instance = new SourceWriter(context);
+ return instance;
+ }
+
+ protected SourceWriter(Context context) {
+ super(context);
+ context.put(SourceWriter.class, this);
+ }
+
+ void setFileManager(JavaFileManager fileManager) {
+ this.fileManager = fileManager;
+ }
+
+ public void reset(ClassFile cf, Code_attribute attr) {
+ setSource(cf);
+ setLineMap(attr);
+ }
+
+ public void writeDetails(Instruction instr) {
+ String indent = space(40); // could get from Options?
+ Set<Integer> lines = lineMap.get(instr.getPC());
+ if (lines != null) {
+ for (int line: lines) {
+ print(indent);
+ print(String.format(" %4d ", line));
+ if (line < sourceLines.length)
+ print(sourceLines[line]);
+ println();
+ int nextLine = nextLine(line);
+ for (int i = line + 1; i < nextLine; i++) {
+ print(indent);
+ print(String.format("(%4d)", i));
+ if (i < sourceLines.length)
+ print(sourceLines[i]);
+ println();
+ }
+ }
+ }
+ }
+
+ public boolean hasSource() {
+ return (sourceLines.length > 0);
+ }
+
+ private void setLineMap(Code_attribute attr) {
+ SortedMap<Integer, SortedSet<Integer>> map = new TreeMap<>();
+ SortedSet<Integer> allLines = new TreeSet<>();
+ for (Attribute a: attr.attributes) {
+ if (a instanceof LineNumberTable_attribute) {
+ LineNumberTable_attribute t = (LineNumberTable_attribute) a;
+ for (LineNumberTable_attribute.Entry e: t.line_number_table) {
+ int start_pc = e.start_pc;
+ int line = e.line_number;
+ SortedSet<Integer> pcLines = map.get(start_pc);
+ if (pcLines == null) {
+ pcLines = new TreeSet<>();
+ map.put(start_pc, pcLines);
+ }
+ pcLines.add(line);
+ allLines.add(line);
+ }
+ }
+ }
+ lineMap = map;
+ lineList = new ArrayList<>(allLines);
+ }
+
+ private void setSource(ClassFile cf) {
+ if (cf != classFile) {
+ classFile = cf;
+ sourceLines = splitLines(readSource(cf));
+ }
+ }
+
+ private String readSource(ClassFile cf) {
+ if (fileManager == null)
+ return null;
+
+ Location location;
+ if (fileManager.hasLocation((StandardLocation.SOURCE_PATH)))
+ location = StandardLocation.SOURCE_PATH;
+ else
+ location = StandardLocation.CLASS_PATH;
+
+ // Guess the source file for a class from the package name for this
+ // class and the base of the source file. This avoids having to read
+ // additional classes to determine the outmost class from any
+ // InnerClasses and EnclosingMethod attributes.
+ try {
+ String className = cf.getName();
+ SourceFile_attribute sf =
+ (SourceFile_attribute) cf.attributes.get(Attribute.SourceFile);
+ if (sf == null) {
+ report(messages.getMessage("err.no.SourceFile.attribute"));
+ return null;
+ }
+ String sourceFile = sf.getSourceFile(cf.constant_pool);
+ String fileBase = sourceFile.endsWith(".java")
+ ? sourceFile.substring(0, sourceFile.length() - 5) : sourceFile;
+ int sep = className.lastIndexOf("/");
+ String pkgName = (sep == -1 ? "" : className.substring(0, sep+1));
+ String topClassName = (pkgName + fileBase).replace('/', '.');
+ JavaFileObject fo =
+ fileManager.getJavaFileForInput(location,
+ topClassName,
+ JavaFileObject.Kind.SOURCE);
+ if (fo == null) {
+ report(messages.getMessage("err.source.file.not.found"));
+ return null;
+ }
+ return fo.getCharContent(true).toString();
+ } catch (ConstantPoolException e) {
+ report(e);
+ return null;
+ } catch (IOException e) {
+ report(e.getLocalizedMessage());
+ return null;
+ }
+ }
+
+ private static String[] splitLines(String text) {
+ if (text == null)
+ return new String[0];
+
+ List<String> lines = new ArrayList<>();
+ lines.add(""); // dummy line 0
+ try {
+ BufferedReader r = new BufferedReader(new StringReader(text));
+ String line;
+ while ((line = r.readLine()) != null)
+ lines.add(line);
+ } catch (IOException ignore) {
+ }
+ return lines.toArray(new String[lines.size()]);
+ }
+
+ private int nextLine(int line) {
+ int i = lineList.indexOf(line);
+ if (i == -1 || i == lineList.size() - 1)
+ return - 1;
+ return lineList.get(i + 1);
+ }
+
+ private JavaFileManager fileManager;
+ private ClassFile classFile;
+ private SortedMap<Integer, SortedSet<Integer>> lineMap;
+ private List<Integer> lineList;
+ private String[] sourceLines;
+}