340 lines
15 KiB
Java
340 lines
15 KiB
Java
/*
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* Copyright (c) 2002-2008 LWJGL Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'LWJGL' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.util.generator;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.IOException;
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import java.io.PrintWriter;
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import java.lang.annotation.Annotation;
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import java.nio.Buffer;
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import java.nio.ByteBuffer;
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import java.nio.channels.FileChannel;
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import java.util.Collection;
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import java.util.List;
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import javax.annotation.processing.ProcessingEnvironment;
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import javax.lang.model.element.*;
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import javax.lang.model.type.TypeKind;
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import javax.lang.model.type.TypeMirror;
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import javax.lang.model.util.ElementKindVisitor6;
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import javax.tools.Diagnostic;
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import javax.tools.Diagnostic.Kind;
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import javax.tools.FileObject;
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import javax.tools.StandardLocation;
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/**
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* Generator visitor for the generator tool
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*
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* @author elias_naur <elias_naur@users.sourceforge.net>
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* @version $Revision$ $Id$
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*/
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public class GeneratorVisitor extends ElementKindVisitor6<Void, Void> {
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private final ProcessingEnvironment env;
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private final TypeMap type_map;
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private final boolean generate_error_checks;
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private final boolean context_specific;
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private final long generatorLM;
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public GeneratorVisitor(ProcessingEnvironment env, TypeMap type_map, boolean generate_error_checks, boolean context_specific, long generatorLM) {
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this.env = env;
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this.type_map = type_map;
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this.generate_error_checks = generate_error_checks;
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this.context_specific = context_specific;
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this.generatorLM = generatorLM;
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}
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private void validateMethod(ExecutableElement method) {
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if ( method.isVarArgs() ) {
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throw new RuntimeException("Method " + method.getSimpleName() + " is variadic");
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}
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Collection<Modifier> modifiers = method.getModifiers();
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if ( !modifiers.contains(Modifier.PUBLIC) ) {
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throw new RuntimeException("Method " + method.getSimpleName() + " is not public");
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}
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if ( method.getThrownTypes().size() > 0 ) {
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throw new RuntimeException("Method " + method.getSimpleName() + " throws checked exceptions");
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}
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validateParameters(method);
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StripPostfix strip_annotation = method.getAnnotation(StripPostfix.class);
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if ( strip_annotation != null && method.getAnnotation(Alternate.class) == null ) {
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String postfix_param_name = strip_annotation.value();
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VariableElement postfix_param = Utils.findParameter(method, postfix_param_name);
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if ( Utils.isParameterMultiTyped(postfix_param) ) {
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throw new RuntimeException("Postfix parameter can't be the same as a multityped parameter in method " + method);
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}
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if ( Utils.getNIOBufferType(postfix_param.asType()) == null ) {
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throw new RuntimeException("Postfix parameter type must be a nio Buffer");
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}
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}
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if ( Utils.getResultParameter(method) != null && !method.getReturnType().equals(env.getTypeUtils().getNoType(TypeKind.VOID)) ) {
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throw new RuntimeException(method + " return type is not void but a parameter is annotated with Result");
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}
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if ( method.getAnnotation(CachedResult.class) != null ) {
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if ( Utils.getNIOBufferType(Utils.getMethodReturnType(method)) == null ) {
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throw new RuntimeException(method + " return type is not a Buffer, but is annotated with CachedResult");
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}
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if ( method.getAnnotation(AutoSize.class) == null ) {
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throw new RuntimeException(method + " is annotated with CachedResult but misses an AutoSize annotation");
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}
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}
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validateTypes(method, method.getAnnotationMirrors(), method.getReturnType());
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}
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private void validateType(ExecutableElement method, Class<? extends Annotation> annotation_type, Class type) {
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Class[] valid_types = type_map.getValidAnnotationTypes(type);
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for ( Class valid_type : valid_types ) {
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if ( valid_type.equals(annotation_type) ) {
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return;
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}
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}
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throw new RuntimeException(type + " is annotated with invalid native type " + annotation_type
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+ " in method " + method);
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}
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private void validateTypes(ExecutableElement method, List<? extends AnnotationMirror> annotations, TypeMirror type_mirror) {
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for ( AnnotationMirror annotation : annotations ) {
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NativeType native_type_annotation = NativeTypeTranslator.getAnnotation(annotation, NativeType.class);
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if ( native_type_annotation != null ) {
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Class<? extends Annotation> annotation_type = NativeTypeTranslator.getClassFromType(annotation.getAnnotationType());
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Class type = Utils.getJavaType(type_mirror);
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if ( Buffer.class.equals(type) ) {
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continue;
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}
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validateType(method, annotation_type, type);
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}
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}
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}
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private void validateParameters(ExecutableElement method) {
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for ( VariableElement param : method.getParameters() ) {
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validateTypes(method, param.getAnnotationMirrors(), param.asType());
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Class<?> param_type = Utils.getJavaType(param.asType());
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if ( Utils.getNIOBufferType(param.asType()) != null && param_type != CharSequence.class && param_type != CharSequence[].class ) {
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Check parameter_check_annotation = param.getAnnotation(Check.class);
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NullTerminated null_terminated_annotation = param.getAnnotation(NullTerminated.class);
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if ( parameter_check_annotation == null && null_terminated_annotation == null ) {
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boolean found_auto_size_param = false;
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for ( VariableElement inner_param : method.getParameters() ) {
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AutoSize auto_size_annotation = inner_param.getAnnotation(AutoSize.class);
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if ( auto_size_annotation != null
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&& auto_size_annotation.value().equals(param.getSimpleName().toString()) ) {
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found_auto_size_param = true;
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break;
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}
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}
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if ( !found_auto_size_param
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&& param.getAnnotation(Result.class) == null
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&& param.getAnnotation(Constant.class) == null
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&& !Utils.isReturnParameter(method, param) ) {
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throw new RuntimeException(param + " has no Check, Result nor Constant annotation, is not the return parameter and no other parameter has"
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+ " an @AutoSize annotation on it in method " + method);
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}
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}
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if ( param.getAnnotation(CachedReference.class) != null && param.getAnnotation(Result.class) != null ) {
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throw new RuntimeException(param + " can't be annotated with both CachedReference and Result");
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}
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if ( param.getAnnotation(BufferObject.class) != null && param.getAnnotation(Result.class) != null ) {
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throw new RuntimeException(param + " can't be annotated with both BufferObject and Result");
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}
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//if (param.getAnnotation(Constant.class) != null)
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//throw new RuntimeException("Buffer parameter " + param + " cannot be Constant");
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} else {
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if ( param.getAnnotation(BufferObject.class) != null ) {
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throw new RuntimeException(param + " type is not a buffer, but annotated as a BufferObject");
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}
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if ( param.getAnnotation(CachedReference.class) != null ) {
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throw new RuntimeException(param + " type is not a buffer, but annotated as a CachedReference");
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}
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}
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}
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}
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private static void generateMethodsNativePointers(PrintWriter writer, Collection<? extends ExecutableElement> methods) {
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for ( ExecutableElement method : methods ) {
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if ( method.getAnnotation(Alternate.class) == null ) {
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generateMethodNativePointers(writer, method);
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}
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}
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}
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private static void generateMethodNativePointers(PrintWriter writer, ExecutableElement method) {
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if ( method.getAnnotation(Extern.class) == null ) {
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writer.print("static ");
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}
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writer.println(Utils.getTypedefName(method) + " " + method.getSimpleName() + ";");
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}
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private void generateJavaSource(TypeElement d, PrintWriter java_writer) throws IOException {
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java_writer.println("/* MACHINE GENERATED FILE, DO NOT EDIT */");
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java_writer.println();
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java_writer.println("package " + env.getElementUtils().getPackageOf(d).getQualifiedName().toString() + ";");
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java_writer.println();
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java_writer.println("import org.lwjgl.*;");
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java_writer.println("import java.nio.*;");
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Imports imports = d.getAnnotation(Imports.class);
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if ( imports != null ) {
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for ( String i : imports.value() ) {
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java_writer.println("import " + i + ";");
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}
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}
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java_writer.println();
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Utils.printDocComment(java_writer, d, env);
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if ( d.getAnnotation(Private.class) == null ) {
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java_writer.print("public ");
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}
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boolean is_final = Utils.isFinal(d);
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if ( is_final ) {
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java_writer.write("final ");
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}
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java_writer.print("class " + Utils.getSimpleClassName(d));
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List<? extends TypeMirror> super_interfaces = d.getInterfaces();
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if ( super_interfaces.size() > 1 ) {
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throw new RuntimeException(d + " extends more than one interface");
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}
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if ( super_interfaces.size() == 1 ) {
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TypeMirror super_interface = super_interfaces.iterator().next();
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java_writer.print(" extends " + Utils.getSimpleClassName(env.getElementUtils().getTypeElement(super_interface.toString())));
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}
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java_writer.println(" {");
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FieldsGenerator.generateFields(env, java_writer, Utils.getFields(d));
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java_writer.println();
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if ( is_final ) {
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// Write private constructor to avoid instantiation
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java_writer.println("\tprivate " + Utils.getSimpleClassName(d) + "() {}");
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}
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if ( Utils.getMethods(d).size() > 0 && !context_specific ) {
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java_writer.println();
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java_writer.println("\tstatic native void " + Utils.STUB_INITIALIZER_NAME + "() throws LWJGLException;");
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}
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JavaMethodsGenerator.generateMethodsJava(env, type_map, java_writer, d, generate_error_checks, context_specific);
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java_writer.println("}");
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String qualified_interface_name = Utils.getQualifiedClassName(d);
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env.getMessager().printMessage(Diagnostic.Kind.NOTE, "Generated class " + qualified_interface_name);
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}
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private void generateNativeSource(TypeElement d) throws IOException {
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if ( d.getKind().equals(ElementKind.ANNOTATION_TYPE) ) {
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return;
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}
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String qualified_interface_name = Utils.getQualifiedClassName(d);
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String qualified_native_name = Utils.getNativeQualifiedName(qualified_interface_name) + ".c";
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try (PrintWriter native_writer = new PrintWriter(env.getFiler().createResource(StandardLocation.CLASS_OUTPUT, "", qualified_native_name).openWriter())) {
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native_writer.println("/* MACHINE GENERATED FILE, DO NOT EDIT */");
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native_writer.println();
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native_writer.println("#include <jni.h>");
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type_map.printNativeIncludes(native_writer);
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native_writer.println();
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TypedefsGenerator.generateNativeTypedefs(type_map, native_writer, Utils.getMethods(d));
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native_writer.println();
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if ( !context_specific ) {
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generateMethodsNativePointers(native_writer, Utils.getMethods(d));
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native_writer.println();
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}
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NativeMethodStubsGenerator.generateNativeMethodStubs(env, type_map, native_writer, d, generate_error_checks, context_specific);
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if ( !context_specific ) {
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native_writer.print("JNIEXPORT void JNICALL " + Utils.getQualifiedNativeMethodName(qualified_interface_name, Utils.STUB_INITIALIZER_NAME));
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native_writer.println("(JNIEnv *env, jclass clazz) {");
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native_writer.println("\tJavaMethodAndExtFunction functions[] = {");
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RegisterStubsGenerator.generateMethodsNativeStubBind(native_writer, d, generate_error_checks, context_specific);
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native_writer.println("\t};");
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native_writer.println("\tint num_functions = NUMFUNCTIONS(functions);");
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native_writer.print("\t");
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native_writer.print(type_map.getRegisterNativesFunctionName());
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native_writer.println("(env, clazz, num_functions, functions);");
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native_writer.println("}");
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}
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}
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env.getMessager().printMessage(Kind.NOTE, "Generated C source " + qualified_interface_name);
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}
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@Override
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public Void visitTypeAsInterface(TypeElement e, Void p) {
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final File input = new File("src/templates/" + e.getQualifiedName().toString().replace('.', '/') + ".java");
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final Collection<? extends ExecutableElement> methods = Utils.getMethods(e);
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if ( methods.isEmpty() && Utils.getFields(e).isEmpty() ) {
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return DEFAULT_VALUE;
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}
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//env.getMessager().printMessage(Kind.NOTE, "methods count : " + Utils.getMethods(e).size() + " fields count : " + Utils.getFields(e).size(), e);
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for ( final ExecutableElement method : methods ) {
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validateMethod(method);
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}
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// TODO: Back-port LWJGL 3's generation file handling (generate in-memory and avoid touching files if nothing has changed)
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try (PrintWriter java_writer = new PrintWriter(env.getFiler().createSourceFile(Utils.getQualifiedClassName(e), env.getElementUtils().getPackageOf(e)).openWriter())) {
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generateJavaSource(e, java_writer);
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if ( methods.size() > 0 ) {
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boolean noNative = true;
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for ( final ExecutableElement method : methods ) {
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Alternate alt_annotation = method.getAnnotation(Alternate.class);
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if ( (alt_annotation == null || alt_annotation.nativeAlt()) && method.getAnnotation(Reuse.class) == null ) {
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noNative = false;
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break;
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}
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}
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if ( noNative ) {
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return DEFAULT_VALUE;
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}
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try {
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generateNativeSource(e);
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} catch (IOException ex) {
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throw new RuntimeException(ex);
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}
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}
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return DEFAULT_VALUE;
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} catch (Exception ex) {
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throw new RuntimeException(ex);
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}
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}
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private static ByteBuffer readFile(final File file) throws IOException {
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final FileChannel channel = new FileInputStream(file).getChannel();
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final long bytesTotal = channel.size();
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final ByteBuffer buffer = ByteBuffer.allocateDirect((int)bytesTotal);
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long bytesRead = 0;
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do {
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bytesRead += channel.read(buffer);
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} while ( bytesRead < bytesTotal );
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buffer.flip();
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channel.close();
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return buffer;
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}
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}
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