Convert Narya (most of the way) over to a Maven Ant task based build. The
ActionScript bits remain belligerent, but the Java stuff is mostly shipshape. git-svn-id: svn+ssh://src.earth.threerings.net/narya/trunk@6222 542714f4-19e9-0310-aa3c-eee0fc999fb1
This commit is contained in:
Michael Bayne
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//
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// $Id$
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//
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// Narya library - tools for developing networked games
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// Copyright (C) 2002-2010 Three Rings Design, Inc., All Rights Reserved
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// http://code.google.com/p/narya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.presents.tools;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.io.File;
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import java.io.IOException;
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import org.apache.tools.ant.DirectoryScanner;
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import org.apache.tools.ant.Task;
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import org.apache.tools.ant.types.FileSet;
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import com.google.common.collect.Lists;
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import com.threerings.io.Streamable;
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import com.threerings.presents.dobj.DObject;
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/**
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* Generates <code>readObject()</code> and <code>writeObject()</code> methods for {@link
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* Streamable} classes that have protected or private members so that they can be used in a
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* sandboxed environment.
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*/
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public class GenStreamableTask extends Task
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{
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/**
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* Adds a nested <fileset> element which enumerates streamable source files.
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*/
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public void addFileset (FileSet set)
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{
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_filesets.add(set);
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}
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@Override
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public void execute ()
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{
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for (FileSet fs : _filesets) {
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DirectoryScanner ds = fs.getDirectoryScanner(getProject());
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File fromDir = fs.getDir(getProject());
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String[] srcFiles = ds.getIncludedFiles();
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for (String srcFile : srcFiles) {
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processClass(new File(fromDir, srcFile));
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}
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}
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}
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/**
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* Processes a {@link Streamable} source file.
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*/
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protected void processClass (File source)
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{
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// load up the file and determine it's package and classname
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String name = null;
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try {
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name = GenUtil.readClassName(source);
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} catch (Exception e) {
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System.err.println("Failed to parse " + source + ": " + e.getMessage());
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return;
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}
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System.err.println("Considering " + name + "...");
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try {
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// in order for annotations to work, this task and all the classes it uses must be
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// loaded from the same class loader as the classes on which we are going to
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// introspect; this is non-ideal but unavoidable
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processClass(source, getClass().getClassLoader().loadClass(name));
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} catch (ClassNotFoundException cnfe) {
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System.err.println("Failed to load " + name + ".\nMissing class: " + cnfe.getMessage());
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System.err.println("Be sure to set the 'classpathref' attribute to a classpath\n" +
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"that contains your projects invocation service classes.");
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} catch (Exception e) {
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e.printStackTrace(System.err);
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}
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}
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/**
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* Processes a resolved {@link Streamable} class instance.
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*/
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protected void processClass (File source, Class<?> sclass)
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throws IOException
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{
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StreamableClassRequirements reqs = new StreamableClassRequirements(sclass);
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// we must implement Streamable, not be a DObject and have some fields that need to be
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// streamed
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if (!Streamable.class.isAssignableFrom(sclass) || DObject.class.isAssignableFrom(sclass) ||
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reqs.streamedFields.isEmpty()) {
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// System.err.println("Skipping " + sclass.getName() + "...");
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return;
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}
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// add readObject() and writeObject() definitions
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StringBuilder readbuf = new StringBuilder(READ_OPEN);
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StringBuilder writebuf = new StringBuilder(WRITE_OPEN);
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if (reqs.superclassStreamable) {
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readbuf.append(" super.readObject(ins);\n");
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writebuf.append(" super.writeObject(out);\n");
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}
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for (Field field : reqs.streamedFields) {
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readbuf.append(" ");
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readbuf.append(field.getName()).append(" = ");
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readbuf.append(toReadObject(field));
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readbuf.append(";\n");
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writebuf.append(" out.");
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writebuf.append(toWriteObject(field));
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writebuf.append(";\n");
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}
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readbuf.append(READ_CLOSE);
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writebuf.append(WRITE_CLOSE);
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SourceFile sfile = new SourceFile();
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try {
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sfile.readFrom(source);
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} catch (IOException ioe) {
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System.err.println("Error reading " + source + ": " + ioe);
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}
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// don't overwrite an existing readObject() or writeObject()
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StringBuilder methods = new StringBuilder();
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if (!sfile.containsString("public void readObject")) {
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methods.append(readbuf);
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}
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if (!sfile.containsString("public void writeObject")) {
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if (methods.length() > 0) {
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methods.append("\n");
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}
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methods.append(writebuf);
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}
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if (methods.length() == 0) {
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return; // nothing to do
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}
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System.err.println("Converting " + sclass.getName() + "...");
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try {
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sfile.writeTo(source, null, methods.toString());
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} catch (IOException ioe) {
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System.err.println("Error writing " + source + ": " + ioe);
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}
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}
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protected String toReadObject (Field field)
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{
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Class<?> type = field.getType();
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if (type.equals(String.class)) {
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return "ins.readUTF()";
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} else if (type.equals(Boolean.TYPE) || type.equals(Boolean.class)) {
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return "ins.readBoolean()";
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} else if (type.equals(Byte.TYPE) || type.equals(Byte.class)) {
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return "ins.readByte()";
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} else if (type.equals(Short.TYPE) || type.equals(Short.class)) {
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return "ins.readShort()";
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} else if (type.equals(Integer.TYPE) || type.equals(Integer.class)) {
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return "ins.readInt()";
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} else if (type.equals(Long.TYPE) || type.equals(Long.class)) {
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return "ins.readLong()";
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} else if (type.equals(Float.TYPE) || type.equals(Float.class)) {
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return "ins.readFloat()";
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} else if (type.equals(Double.TYPE) || type.equals(Double.class)) {
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return "ins.readDouble()";
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} else {
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return "(" + GenUtil.simpleName(field) + ")ins.readObject()";
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}
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}
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protected String toWriteObject (Field field)
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{
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Class<?> type = field.getType();
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String name = field.getName();
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if (type.equals(Boolean.TYPE) || type.equals(Boolean.class)) {
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return "writeBoolean(" + name + ")";
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} else if (type.equals(Byte.TYPE) || type.equals(Byte.class)) {
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return "writeByte(" + name + ")";
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} else if (type.equals(Short.TYPE) || type.equals(Short.class)) {
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return "writeShort(" + name + ")";
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} else if (type.equals(Integer.TYPE) || type.equals(Integer.class)) {
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return "writeInt(" + name + ")";
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} else if (type.equals(Long.TYPE) || type.equals(Long.class)) {
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return "writeLong(" + name + ")";
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} else if (type.equals(Float.TYPE) || type.equals(Float.class)) {
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return "writeFloat(" + name + ")";
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} else if (type.equals(Double.TYPE) || type.equals(Double.class)) {
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return "writeDouble(" + name + ")";
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} else if (type.equals(String.class)) {
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return "writeUTF(" + name + ")";
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} else {
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return "writeObject(" + name + ")";
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}
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}
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/** A list of filesets that contain tile images. */
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protected ArrayList<FileSet> _filesets = Lists.newArrayList();
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protected static final String READ_OPEN =
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" // from interface Streamable\n" +
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" public void readObject (ObjectInputStream ins)\n" +
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" throws IOException, ClassNotFoundException\n" +
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" {\n";
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protected static final String READ_CLOSE = " }\n";
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protected static final String WRITE_OPEN =
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" // from interface Streamable\n" +
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" public void writeObject (ObjectOutputStream out)\n" +
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" throws IOException\n" +
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" {\n";
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protected static final String WRITE_CLOSE = " }\n";
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}
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