/*
* Copyright (c) 2010, Michael Bien. All rights reserved.
* Copyright (c) 2013 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of Michael Bien nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL Michael Bien BE LIABLE FOR ANY
* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package com.jogamp.gluegen.structgen;
import com.jogamp.common.util.PropertyAccess;
import com.jogamp.gluegen.GlueGen;
import com.jogamp.gluegen.JavaEmitter;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Reader;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.annotation.processing.AbstractProcessor;
import javax.annotation.processing.Filer;
import javax.annotation.processing.Messager;
import javax.annotation.processing.ProcessingEnvironment;
import javax.annotation.processing.RoundEnvironment;
import javax.annotation.processing.SupportedAnnotationTypes;
import javax.annotation.processing.SupportedSourceVersion;
import javax.lang.model.SourceVersion;
import javax.lang.model.element.Element;
import javax.lang.model.element.TypeElement;
import javax.lang.model.util.Elements;
import javax.tools.Diagnostic.Kind;
import javax.tools.FileObject;
import javax.tools.StandardLocation;
import jogamp.common.Debug;
/**
* <p>
* If the <i>header file</i> is absolute, the <i>root path</i> is the parent folder of the folder containing the package source, i.e.:
* <pre>
* Header: /gluegen/src/junit/com/jogamp/test/structgen/TestStruct01.h
* Root: /gluegen/src/junit/..
* Root: /gluegen/src
* </pre>
* Otherwise the <i>user.dir</i> is being used as the <i>root path</i>
* and the relative <i>header file</i> is appended to it.
* </p>
* The property <code>jogamp.gluegen.structgen.output</code> allows setting a default <i>outputPath</i>
* for the generated sources, if the {@link ProcessingEnvironment}'s <code>structgen.output</code> option is not set.
* <p>
* If the <i>outputPath</i> is relative, it is appended to the <i>root path</i>,
* otherwise it is taken as-is.
* </p>
* <p>
* User can enable DEBUG while defining property <code>jogamp.gluegen.structgen.debug</code>.
* </p>
*
* @author Michael Bien, et al.
*/
@SupportedAnnotationTypes(value = {"com.jogamp.gluegen.structgen.CStruct", "com.jogamp.gluegen.structgen.CStructs"})
@SupportedSourceVersion(SourceVersion.RELEASE_6)
public class CStructAnnotationProcessor extends AbstractProcessor {
private static final String DEFAULT = "_default_";
static final boolean DEBUG;
static {
Debug.initSingleton();
DEBUG = PropertyAccess.isPropertyDefined("jogamp.gluegen.structgen.debug", true);
}
private static final String STRUCTGENOUTPUT_OPTION = "structgen.output";
private static final String STRUCTGENOUTPUT = PropertyAccess.getProperty("jogamp.gluegen."+STRUCTGENOUTPUT_OPTION, true, "gensrc");
private Filer filer;
private Messager messager;
private Elements eltUtils;
private String outputPath;
private final static Set<String> generatedStructs = new HashSet<String>();
@Override
public void init(final ProcessingEnvironment processingEnv) {
super.init(processingEnv);
filer = processingEnv.getFiler();
messager = processingEnv.getMessager();
eltUtils = processingEnv.getElementUtils();
outputPath = processingEnv.getOptions().get(STRUCTGENOUTPUT_OPTION);
outputPath = outputPath == null ? STRUCTGENOUTPUT : outputPath;
}
private File locateSource(final String packageName, final String relativeName) {
try {
if( DEBUG ) {
System.err.println("CStruct.locateSource.0: p "+packageName+", r "+relativeName);
}
final FileObject h = filer.getResource(StandardLocation.SOURCE_PATH, packageName, relativeName);
if( DEBUG ) {
System.err.println("CStruct.locateSource.1: h "+h.toUri());
}
final File f = new File( h.toUri().getPath() ); // URI is incomplete (no scheme), hence use path only!
if( f.exists() ) {
return f;
}
} catch (final IOException e) {
if(DEBUG) {
System.err.println("Caught "+e.getClass().getSimpleName()+": "+e.getMessage()); /* e.printStackTrace(); */
}
}
return null;
}
@Override
public boolean process(final Set<? extends TypeElement> annotations, final RoundEnvironment env) {
final String user_dir = System.getProperty("user.dir");
final Set<? extends Element> cStructsElements = env.getElementsAnnotatedWith(CStructs.class);
for (final Element structsElement : cStructsElements) {
final String packageName = eltUtils.getPackageOf(structsElement).toString();
final CStructs cstructs = structsElement.getAnnotation(CStructs.class);
if( null != cstructs ) {
final CStruct[] cstructArray = cstructs.value();
for(final CStruct cstruct : cstructArray) {
processCStruct(cstruct, structsElement, packageName, user_dir);
}
}
}
final Set<? extends Element> cStructElements = env.getElementsAnnotatedWith(CStruct.class);
for (final Element structElement : cStructElements) {
final String packageName = eltUtils.getPackageOf(structElement).toString();
final CStruct cstruct = structElement.getAnnotation(CStruct.class);
if( null != cstruct ) {
processCStruct(cstruct, structElement, packageName, user_dir);
}
}
return true;
}
private void processCStruct(final CStruct struct, final Element element, final String packageName, final String user_dir) {
try {
final String headerRelPath = struct.header();
final Element enclElement = element.getEnclosingElement();
final boolean isPackageOrType = null == enclElement;
System.err.println("CStruct: "+struct+", package "+packageName+", header "+headerRelPath);
if(DEBUG) {
System.err.println("CStruct.0: user.dir: "+user_dir);
System.err.println("CStruct.0: element: "+element+", .simpleName "+element.getSimpleName());
System.err.print("CStruct.0: isPackageOrType "+isPackageOrType+", enclElement: "+enclElement);
if( !isPackageOrType ) {
System.err.println(", .simpleName "+enclElement.getSimpleName()+", .package "+eltUtils.getPackageOf(enclElement).toString());
} else {
System.err.println("");
}
}
if( isPackageOrType && struct.name().equals(DEFAULT) ) {
throw new IllegalArgumentException("CStruct annotation on package or type must have name specified: "+struct+" @ "+element);
}
final File headerFile;
{
File f = locateSource(packageName, headerRelPath);
if( null == f ) {
f = locateSource("", headerRelPath);
if( null == f ) {
// bail out
throw new RuntimeException("Could not locate header "+headerRelPath+", package "+packageName);
}
}
headerFile = f;
}
final String rootOut, headerParent;
{
final String root0 = headerFile.getAbsolutePath();
headerParent = root0.substring(0, root0.length()-headerFile.getName().length()-1);
rootOut = headerParent.substring(0, headerParent.length()-packageName.length()) + "..";
}
System.err.println("CStruct: "+headerFile+", abs: "+headerFile.isAbsolute()+", headerParent "+headerParent+", rootOut "+rootOut);
generateStructBinding(element, struct, isPackageOrType, rootOut, packageName, headerFile, headerParent);
} catch (final IOException ex) {
throw new RuntimeException("IOException while processing!", ex);
}
}
private void generateStructBinding(final Element element, final CStruct struct, final boolean isPackageOrType, final String rootOut, final String pakage, final File header, final String headerParent) throws IOException {
final String declaredType = element.asType().toString();
final boolean useStructName = !struct.name().equals(DEFAULT);
final String structName = useStructName ? struct.name() : declaredType;
final boolean useJavaName = !struct.jname().equals(DEFAULT);
final String finalType = useJavaName ? struct.jname() : ( !isPackageOrType ? declaredType : structName );
System.err.println("CStruct: Generating struct accessor for struct: "+structName+" -> "+finalType+" [struct.name "+struct.name()+", struct.jname "+struct.jname()+", declaredType "+declaredType+"]");
if( generatedStructs.contains(finalType) ) {
messager.printMessage(Kind.NOTE, "struct "+structName+" already defined elsewhere, skipping.", element);
return;
}
final boolean outputDirAbs;
{
final File outputDirFile = new File(outputPath);
outputDirAbs = outputDirFile.isAbsolute();
}
final String outputPath1 = outputDirAbs ? outputPath : rootOut + File.separator + outputPath;
final String config = outputPath1 + File.separator + header.getName() + ".cfg";
final File configFile = new File(config);
if(DEBUG) {
System.err.println("CStruct: OutputDir: "+outputPath+", is-abs "+outputDirAbs);
System.err.println("CStruct: OutputPath: "+outputPath1);
System.err.println("CStruct: ConfigFile: "+configFile);
}
FileWriter writer = null;
try{
writer = new FileWriter(configFile);
writer.write("Package "+pakage+"\n");
writer.write("EmitStruct "+structName+"\n");
if( finalType != structName ) {
// We allow renaming the structType to the element's declaredType (FIELD annotation only)
writer.write("RenameJavaType " + struct.name()+" " + declaredType +"\n");
}
} finally {
if( null != writer ) {
writer.close();
}
}
final List<String> cfgFiles = new ArrayList<String>();
cfgFiles.add(config);
final List<String> includePaths = new ArrayList<String>();
includePaths.add(headerParent);
includePaths.add(outputPath1);
final Reader reader;
final String filename = header.getPath();
try {
reader = new BufferedReader(new FileReader(filename));
} catch (final FileNotFoundException ex) {
throw new RuntimeException("input file not found", ex);
}
if( DEBUG ) {
GlueGen.setDebug(true);
}
new GlueGen().run(reader, filename, AnnotationProcessorJavaStructEmitter.class,
includePaths, cfgFiles, outputPath1, false /* copyCPPOutput2Stderr */);
configFile.delete();
generatedStructs.add(finalType);
}
public static class AnnotationProcessorJavaStructEmitter extends JavaEmitter {
@Override
protected PrintWriter openFile(final String filename, final String simpleClassName) throws IOException {
if( generatedStructs.contains(simpleClassName) ) {
System.err.println("skipping -> " + simpleClassName);
return null;
}
// look for recursive generated structs... keep it DRY
if( !simpleClassName.endsWith("32") &&
!simpleClassName.endsWith("64") ) {
System.err.println("generating -> " + simpleClassName);
generatedStructs.add(simpleClassName);
}
return super.openFile(filename, simpleClassName);
}
}
}