/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
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package com.oracle.truffle.dsl.processor.parser;
import java.lang.annotation.Annotation;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import javax.lang.model.element.AnnotationMirror;
import javax.lang.model.element.Element;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.Modifier;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.ElementFilter;
import com.oracle.truffle.dsl.processor.ProcessorContext;
import com.oracle.truffle.dsl.processor.java.ElementUtils;
import com.oracle.truffle.dsl.processor.model.MethodSpec;
import com.oracle.truffle.dsl.processor.model.Template;
import com.oracle.truffle.dsl.processor.model.TemplateMethod;
import com.oracle.truffle.dsl.processor.model.TypeSystemData;
public abstract class TemplateMethodParser<T extends Template, E extends TemplateMethod> {
protected final T template;
private final ProcessorContext context;
private final MethodSpecParser parser;
private boolean parseNullOnError;
public TemplateMethodParser(ProcessorContext context, T template) {
this.template = template;
this.context = context;
this.parser = new MethodSpecParser(template);
}
public void setParseNullOnError(boolean parseNullOnError) {
this.parseNullOnError = parseNullOnError;
}
public boolean isParseNullOnError() {
return parseNullOnError;
}
public MethodSpecParser getParser() {
return parser;
}
public ProcessorContext getContext() {
return context;
}
public TypeSystemData getTypeSystem() {
return template.getTypeSystem();
}
public abstract MethodSpec createSpecification(ExecutableElement method, AnnotationMirror mirror);
public abstract E create(TemplateMethod method, boolean invalid);
public abstract boolean isParsable(ExecutableElement method);
public Class<? extends Annotation> getAnnotationType() {
return null;
}
public final List<E> parse(List<? extends Element> elements) {
List<ExecutableElement> methods = new ArrayList<>();
methods.addAll(ElementFilter.methodsIn(elements));
List<E> parsedMethods = new ArrayList<>();
boolean valid = true;
int naturalOrder = 0;
for (ExecutableElement method : methods) {
if (!isParsable(method)) {
continue;
}
Class<? extends Annotation> annotationType = getAnnotationType();
AnnotationMirror mirror = null;
if (annotationType != null) {
mirror = ElementUtils.findAnnotationMirror(getContext().getEnvironment(), method, annotationType);
}
E parsedMethod = parse(naturalOrder, method, mirror);
if (method.getModifiers().contains(Modifier.PRIVATE) && parser.isEmitErrors()) {
parsedMethod.addError("Method annotated with @%s must not be private.", getAnnotationType().getSimpleName());
parsedMethods.add(parsedMethod);
valid = false;
continue;
}
if (parsedMethod != null) {
parsedMethods.add(parsedMethod);
} else {
valid = false;
}
naturalOrder++;
}
Collections.sort(parsedMethods);
if (!valid && isParseNullOnError()) {
return null;
}
return parsedMethods;
}
private E parse(int naturalOrder, ExecutableElement method, AnnotationMirror annotation) {
MethodSpec methodSpecification = createSpecification(method, annotation);
if (methodSpecification == null) {
return null;
}
TemplateMethod templateMethod = parser.parse(methodSpecification, method, annotation, naturalOrder);
if (templateMethod != null) {
return create(templateMethod, templateMethod.hasErrors());
}
return null;
}
public final E create(String id, int naturalOrder, ExecutableElement methodMetadata, AnnotationMirror mirror, TypeMirror returnType, List<VariableElement> parameterTypes) {
TemplateMethod method = parser.parseImpl(createSpecification(methodMetadata, mirror), naturalOrder, id, methodMetadata, mirror, returnType, parameterTypes);
if (method != null) {
return create(method, method.hasErrors());
}
return null;
}
}