714 lines
23 KiB
Java
714 lines
23 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of 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,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.jasper.compiler;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileNotFoundException;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.OutputStreamWriter;
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import java.io.PrintWriter;
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import java.io.UnsupportedEncodingException;
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import java.nio.charset.StandardCharsets;
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import java.util.HashMap;
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import java.util.Map;
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import org.apache.jasper.JasperException;
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import org.apache.jasper.JspCompilationContext;
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import org.apache.juli.logging.Log;
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import org.apache.juli.logging.LogFactory;
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/**
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* Contains static utilities for generating SMAP data based on the
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* current version of Jasper.
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*
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* @author Jayson Falkner
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* @author Shawn Bayern
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* @author Robert Field (inner SDEInstaller class)
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* @author Mark Roth
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* @author Kin-man Chung
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*/
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public class SmapUtil {
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//*********************************************************************
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// Constants
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private static final String SMAP_ENCODING = "UTF-8";
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//*********************************************************************
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// Public entry points
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/**
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* Generates an appropriate SMAP representing the current compilation
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* context. (JSR-045.)
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*
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* @param ctxt Current compilation context
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* @param pageNodes The current JSP page
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* @return a SMAP for the page
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* @throws IOException Error writing SMAP
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*/
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public static String[] generateSmap(
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JspCompilationContext ctxt,
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Node.Nodes pageNodes)
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throws IOException {
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// Scan the nodes for presence of Jasper generated inner classes
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PreScanVisitor psVisitor = new PreScanVisitor();
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try {
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pageNodes.visit(psVisitor);
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} catch (JasperException ex) {
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}
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HashMap<String, SmapStratum> map = psVisitor.getMap();
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// set up our SMAP generator
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SmapGenerator g = new SmapGenerator();
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/** Disable reading of input SMAP because:
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1. There is a bug here: getRealPath() is null if .jsp is in a jar
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Bugzilla 14660.
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2. Mappings from other sources into .jsp files are not supported.
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TODO: fix 1. if 2. is not true.
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// determine if we have an input SMAP
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String smapPath = inputSmapPath(ctxt.getRealPath(ctxt.getJspFile()));
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File inputSmap = new File(smapPath);
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if (inputSmap.exists()) {
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byte[] embeddedSmap = null;
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byte[] subSmap = SDEInstaller.readWhole(inputSmap);
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String subSmapString = new String(subSmap, SMAP_ENCODING);
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g.addSmap(subSmapString, "JSP");
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}
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**/
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// now, assemble info about our own stratum (JSP) using JspLineMap
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SmapStratum s = new SmapStratum();
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g.setOutputFileName(unqualify(ctxt.getServletJavaFileName()));
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// Map out Node.Nodes
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evaluateNodes(pageNodes, s, map, ctxt.getOptions().getMappedFile());
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s.optimizeLineSection();
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g.setStratum(s);
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if (ctxt.getOptions().isSmapDumped()) {
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File outSmap = new File(ctxt.getClassFileName() + ".smap");
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PrintWriter so =
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new PrintWriter(
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new OutputStreamWriter(
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new FileOutputStream(outSmap),
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SMAP_ENCODING));
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so.print(g.getString());
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so.close();
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}
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String classFileName = ctxt.getClassFileName();
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int innerClassCount = map.size();
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String [] smapInfo = new String[2 + innerClassCount*2];
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smapInfo[0] = classFileName;
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smapInfo[1] = g.getString();
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int count = 2;
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for (Map.Entry<String, SmapStratum> entry : map.entrySet()) {
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String innerClass = entry.getKey();
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s = entry.getValue();
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s.optimizeLineSection();
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g = new SmapGenerator();
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g.setOutputFileName(unqualify(ctxt.getServletJavaFileName()));
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g.setStratum(s);
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String innerClassFileName =
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classFileName.substring(0, classFileName.indexOf(".class")) +
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'$' + innerClass + ".class";
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if (ctxt.getOptions().isSmapDumped()) {
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File outSmap = new File(innerClassFileName + ".smap");
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PrintWriter so =
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new PrintWriter(
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new OutputStreamWriter(
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new FileOutputStream(outSmap),
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SMAP_ENCODING));
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so.print(g.getString());
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so.close();
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}
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smapInfo[count] = innerClassFileName;
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smapInfo[count+1] = g.getString();
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count += 2;
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}
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return smapInfo;
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}
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public static void installSmap(String[] smap)
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throws IOException {
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if (smap == null) {
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return;
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}
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for (int i = 0; i < smap.length; i += 2) {
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File outServlet = new File(smap[i]);
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SDEInstaller.install(outServlet,
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smap[i+1].getBytes(StandardCharsets.ISO_8859_1));
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}
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}
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//*********************************************************************
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// Private utilities
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/**
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* Returns an unqualified version of the given file path.
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*/
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private static String unqualify(String path) {
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path = path.replace('\\', '/');
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return path.substring(path.lastIndexOf('/') + 1);
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}
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//*********************************************************************
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// Installation logic (from Robert Field, JSR-045 spec lead)
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private static class SDEInstaller {
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private final Log log = LogFactory.getLog(SDEInstaller.class); // must not be static
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static final String nameSDE = "SourceDebugExtension";
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byte[] orig;
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byte[] sdeAttr;
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byte[] gen;
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int origPos = 0;
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int genPos = 0;
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int sdeIndex;
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static void install(File classFile, byte[] smap) throws IOException {
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File tmpFile = new File(classFile.getPath() + "tmp");
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SDEInstaller installer = new SDEInstaller(classFile, smap);
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installer.install(tmpFile);
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if (!classFile.delete()) {
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throw new IOException(Localizer.getMessage("jsp.error.unable.deleteClassFile",
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classFile.getAbsolutePath()));
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}
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if (!tmpFile.renameTo(classFile)) {
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throw new IOException(Localizer.getMessage("jsp.error.unable.renameClassFile",
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tmpFile.getAbsolutePath(), classFile.getAbsolutePath()));
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}
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}
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SDEInstaller(File inClassFile, byte[] sdeAttr)
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throws IOException {
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if (!inClassFile.exists()) {
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throw new FileNotFoundException("no such file: " + inClassFile);
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}
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this.sdeAttr = sdeAttr;
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// get the bytes
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orig = readWhole(inClassFile);
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gen = new byte[orig.length + sdeAttr.length + 100];
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}
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void install(File outClassFile) throws IOException {
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// do it
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addSDE();
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// write result
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try (FileOutputStream outStream = new FileOutputStream(outClassFile);) {
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outStream.write(gen, 0, genPos);
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}
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}
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static byte[] readWhole(File input) throws IOException {
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int len = (int)input.length();
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byte[] bytes = new byte[len];
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try (FileInputStream inStream = new FileInputStream(input)) {
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if (inStream.read(bytes, 0, len) != len) {
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throw new IOException("expected size: " + len);
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}
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}
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return bytes;
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}
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void addSDE() throws UnsupportedEncodingException, IOException {
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copy(4 + 2 + 2); // magic min/maj version
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int constantPoolCountPos = genPos;
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int constantPoolCount = readU2();
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if (log.isDebugEnabled())
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log.debug("constant pool count: " + constantPoolCount);
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writeU2(constantPoolCount);
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// copy old constant pool return index of SDE symbol, if found
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sdeIndex = copyConstantPool(constantPoolCount);
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if (sdeIndex < 0) {
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// if "SourceDebugExtension" symbol not there add it
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writeUtf8ForSDE();
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// increment the constantPoolCount
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sdeIndex = constantPoolCount;
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++constantPoolCount;
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randomAccessWriteU2(constantPoolCountPos, constantPoolCount);
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if (log.isDebugEnabled())
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log.debug("SourceDebugExtension not found, installed at: " + sdeIndex);
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} else {
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if (log.isDebugEnabled())
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log.debug("SourceDebugExtension found at: " + sdeIndex);
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}
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copy(2 + 2 + 2); // access, this, super
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int interfaceCount = readU2();
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writeU2(interfaceCount);
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if (log.isDebugEnabled())
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log.debug("interfaceCount: " + interfaceCount);
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copy(interfaceCount * 2);
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copyMembers(); // fields
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copyMembers(); // methods
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int attrCountPos = genPos;
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int attrCount = readU2();
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writeU2(attrCount);
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if (log.isDebugEnabled())
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log.debug("class attrCount: " + attrCount);
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// copy the class attributes, return true if SDE attr found (not copied)
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if (!copyAttrs(attrCount)) {
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// we will be adding SDE and it isn't already counted
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++attrCount;
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randomAccessWriteU2(attrCountPos, attrCount);
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if (log.isDebugEnabled())
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log.debug("class attrCount incremented");
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}
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writeAttrForSDE(sdeIndex);
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}
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void copyMembers() {
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int count = readU2();
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writeU2(count);
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if (log.isDebugEnabled())
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log.debug("members count: " + count);
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for (int i = 0; i < count; ++i) {
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copy(6); // access, name, descriptor
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int attrCount = readU2();
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writeU2(attrCount);
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if (log.isDebugEnabled())
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log.debug("member attr count: " + attrCount);
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copyAttrs(attrCount);
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}
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}
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boolean copyAttrs(int attrCount) {
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boolean sdeFound = false;
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for (int i = 0; i < attrCount; ++i) {
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int nameIndex = readU2();
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// don't write old SDE
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if (nameIndex == sdeIndex) {
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sdeFound = true;
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if (log.isDebugEnabled())
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log.debug("SDE attr found");
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} else {
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writeU2(nameIndex); // name
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int len = readU4();
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writeU4(len);
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copy(len);
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if (log.isDebugEnabled())
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log.debug("attr len: " + len);
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}
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}
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return sdeFound;
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}
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void writeAttrForSDE(int index) {
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writeU2(index);
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writeU4(sdeAttr.length);
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for (int i = 0; i < sdeAttr.length; ++i) {
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writeU1(sdeAttr[i]);
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}
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}
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void randomAccessWriteU2(int pos, int val) {
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int savePos = genPos;
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genPos = pos;
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writeU2(val);
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genPos = savePos;
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}
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int readU1() {
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return orig[origPos++] & 0xFF;
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}
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int readU2() {
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int res = readU1();
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return (res << 8) + readU1();
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}
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int readU4() {
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int res = readU2();
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return (res << 16) + readU2();
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}
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void writeU1(int val) {
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gen[genPos++] = (byte)val;
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}
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void writeU2(int val) {
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writeU1(val >> 8);
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writeU1(val & 0xFF);
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}
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void writeU4(int val) {
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writeU2(val >> 16);
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writeU2(val & 0xFFFF);
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}
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void copy(int count) {
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for (int i = 0; i < count; ++i) {
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gen[genPos++] = orig[origPos++];
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}
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}
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byte[] readBytes(int count) {
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byte[] bytes = new byte[count];
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for (int i = 0; i < count; ++i) {
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bytes[i] = orig[origPos++];
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}
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return bytes;
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}
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void writeBytes(byte[] bytes) {
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for (int i = 0; i < bytes.length; ++i) {
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gen[genPos++] = bytes[i];
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}
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}
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int copyConstantPool(int constantPoolCount)
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throws UnsupportedEncodingException, IOException {
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int sdeIndex = -1;
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// copy const pool index zero not in class file
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for (int i = 1; i < constantPoolCount; ++i) {
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int tag = readU1();
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writeU1(tag);
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switch (tag) {
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case 7 : // Class
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case 8 : // String
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case 16 : // MethodType
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if (log.isDebugEnabled())
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log.debug(i + " copying 2 bytes");
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copy(2);
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break;
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case 15 : // MethodHandle
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if (log.isDebugEnabled())
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log.debug(i + " copying 3 bytes");
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copy(3);
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break;
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case 9 : // Field
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case 10 : // Method
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case 11 : // InterfaceMethod
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case 3 : // Integer
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case 4 : // Float
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case 12 : // NameAndType
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case 18 : // InvokeDynamic
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if (log.isDebugEnabled())
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log.debug(i + " copying 4 bytes");
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copy(4);
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break;
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case 5 : // Long
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case 6 : // Double
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if (log.isDebugEnabled())
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log.debug(i + " copying 8 bytes");
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copy(8);
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i++;
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break;
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case 1 : // Utf8
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int len = readU2();
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writeU2(len);
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byte[] utf8 = readBytes(len);
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String str = new String(utf8, "UTF-8");
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if (log.isDebugEnabled())
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log.debug(i + " read class attr -- '" + str + "'");
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if (str.equals(nameSDE)) {
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sdeIndex = i;
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}
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writeBytes(utf8);
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break;
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default :
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throw new IOException("unexpected tag: " + tag);
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}
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}
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return sdeIndex;
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}
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void writeUtf8ForSDE() {
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int len = nameSDE.length();
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writeU1(1); // Utf8 tag
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writeU2(len);
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for (int i = 0; i < len; ++i) {
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writeU1(nameSDE.charAt(i));
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}
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}
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}
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public static void evaluateNodes(
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Node.Nodes nodes,
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SmapStratum s,
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HashMap<String, SmapStratum> innerClassMap,
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boolean breakAtLF) {
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try {
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nodes.visit(new SmapGenVisitor(s, breakAtLF, innerClassMap));
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} catch (JasperException ex) {
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}
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}
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private static class SmapGenVisitor extends Node.Visitor {
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private SmapStratum smap;
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private final boolean breakAtLF;
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private final HashMap<String, SmapStratum> innerClassMap;
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SmapGenVisitor(SmapStratum s, boolean breakAtLF, HashMap<String, SmapStratum> map) {
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this.smap = s;
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this.breakAtLF = breakAtLF;
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this.innerClassMap = map;
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}
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@Override
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public void visitBody(Node n) throws JasperException {
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SmapStratum smapSave = smap;
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String innerClass = n.getInnerClassName();
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if (innerClass != null) {
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this.smap = innerClassMap.get(innerClass);
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}
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super.visitBody(n);
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smap = smapSave;
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}
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@Override
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public void visit(Node.Declaration n) throws JasperException {
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doSmapText(n);
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}
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@Override
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public void visit(Node.Expression n) throws JasperException {
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doSmapText(n);
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}
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@Override
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public void visit(Node.Scriptlet n) throws JasperException {
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doSmapText(n);
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}
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@Override
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public void visit(Node.IncludeAction n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.ForwardAction n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.GetProperty n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.SetProperty n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.UseBean n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.PlugIn n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.CustomTag n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.UninterpretedTag n) throws JasperException {
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doSmap(n);
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visitBody(n);
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}
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@Override
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public void visit(Node.JspElement n) throws JasperException {
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doSmap(n);
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visitBody(n);
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|
}
|
|
|
|
@Override
|
|
public void visit(Node.JspText n) throws JasperException {
|
|
doSmap(n);
|
|
visitBody(n);
|
|
}
|
|
|
|
@Override
|
|
public void visit(Node.NamedAttribute n) throws JasperException {
|
|
visitBody(n);
|
|
}
|
|
|
|
@Override
|
|
public void visit(Node.JspBody n) throws JasperException {
|
|
doSmap(n);
|
|
visitBody(n);
|
|
}
|
|
|
|
@Override
|
|
public void visit(Node.InvokeAction n) throws JasperException {
|
|
doSmap(n);
|
|
visitBody(n);
|
|
}
|
|
|
|
@Override
|
|
public void visit(Node.DoBodyAction n) throws JasperException {
|
|
doSmap(n);
|
|
visitBody(n);
|
|
}
|
|
|
|
@Override
|
|
public void visit(Node.ELExpression n) throws JasperException {
|
|
doSmap(n);
|
|
}
|
|
|
|
@Override
|
|
public void visit(Node.TemplateText n) throws JasperException {
|
|
Mark mark = n.getStart();
|
|
if (mark == null) {
|
|
return;
|
|
}
|
|
|
|
//Add the file information
|
|
String fileName = mark.getFile();
|
|
smap.addFile(unqualify(fileName), fileName);
|
|
|
|
//Add a LineInfo that corresponds to the beginning of this node
|
|
int iInputStartLine = mark.getLineNumber();
|
|
int iOutputStartLine = n.getBeginJavaLine();
|
|
int iOutputLineIncrement = breakAtLF? 1: 0;
|
|
smap.addLineData(iInputStartLine, fileName, 1, iOutputStartLine,
|
|
iOutputLineIncrement);
|
|
|
|
// Output additional mappings in the text
|
|
java.util.ArrayList<Integer> extraSmap = n.getExtraSmap();
|
|
|
|
if (extraSmap != null) {
|
|
for (int i = 0; i < extraSmap.size(); i++) {
|
|
iOutputStartLine += iOutputLineIncrement;
|
|
smap.addLineData(
|
|
iInputStartLine+extraSmap.get(i).intValue(),
|
|
fileName,
|
|
1,
|
|
iOutputStartLine,
|
|
iOutputLineIncrement);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void doSmap(
|
|
Node n,
|
|
int inLineCount,
|
|
int outIncrement,
|
|
int skippedLines) {
|
|
Mark mark = n.getStart();
|
|
if (mark == null) {
|
|
return;
|
|
}
|
|
|
|
String unqualifiedName = unqualify(mark.getFile());
|
|
smap.addFile(unqualifiedName, mark.getFile());
|
|
smap.addLineData(
|
|
mark.getLineNumber() + skippedLines,
|
|
mark.getFile(),
|
|
inLineCount - skippedLines,
|
|
n.getBeginJavaLine() + skippedLines,
|
|
outIncrement);
|
|
}
|
|
|
|
private void doSmap(Node n) {
|
|
doSmap(n, 1, n.getEndJavaLine() - n.getBeginJavaLine(), 0);
|
|
}
|
|
|
|
private void doSmapText(Node n) {
|
|
String text = n.getText();
|
|
int index = 0;
|
|
int next = 0;
|
|
int lineCount = 1;
|
|
int skippedLines = 0;
|
|
boolean slashStarSeen = false;
|
|
boolean beginning = true;
|
|
|
|
// Count lines inside text, but skipping comment lines at the
|
|
// beginning of the text.
|
|
while ((next = text.indexOf('\n', index)) > -1) {
|
|
if (beginning) {
|
|
String line = text.substring(index, next).trim();
|
|
if (!slashStarSeen && line.startsWith("/*")) {
|
|
slashStarSeen = true;
|
|
}
|
|
if (slashStarSeen) {
|
|
skippedLines++;
|
|
int endIndex = line.indexOf("*/");
|
|
if (endIndex >= 0) {
|
|
// End of /* */ comment
|
|
slashStarSeen = false;
|
|
if (endIndex < line.length() - 2) {
|
|
// Some executable code after comment
|
|
skippedLines--;
|
|
beginning = false;
|
|
}
|
|
}
|
|
} else if (line.length() == 0 || line.startsWith("//")) {
|
|
skippedLines++;
|
|
} else {
|
|
beginning = false;
|
|
}
|
|
}
|
|
lineCount++;
|
|
index = next + 1;
|
|
}
|
|
|
|
doSmap(n, lineCount, 1, skippedLines);
|
|
}
|
|
}
|
|
|
|
private static class PreScanVisitor extends Node.Visitor {
|
|
|
|
HashMap<String, SmapStratum> map = new HashMap<>();
|
|
|
|
@Override
|
|
public void doVisit(Node n) {
|
|
String inner = n.getInnerClassName();
|
|
if (inner != null && !map.containsKey(inner)) {
|
|
map.put(inner, new SmapStratum());
|
|
}
|
|
}
|
|
|
|
HashMap<String, SmapStratum> getMap() {
|
|
return map;
|
|
}
|
|
}
|
|
|
|
}
|