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juzu.impl.compiler.ElementHandle Maven / Gradle / Ivy
/*
* Copyright 2013 eXo Platform SAS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package juzu.impl.compiler;
import juzu.impl.common.MethodHandle;
import juzu.impl.common.Name;
import javax.annotation.processing.ProcessingEnvironment;
import javax.lang.model.element.Element;
import javax.lang.model.element.ElementKind;
import javax.lang.model.element.ExecutableElement;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.ExecutableType;
import javax.lang.model.type.TypeMirror;
import javax.lang.model.util.ElementFilter;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.List;
/** @author Julien Viet */
public abstract class ElementHandle implements Serializable {
public static ElementHandle create(Element elt) {
ElementKind kind = elt.getKind();
switch (kind) {
case FIELD: {
VariableElement variableElt = (VariableElement)elt;
return Field.create(variableElt);
}
case CLASS: {
TypeElement typeElt = (TypeElement)elt;
return Type.create(typeElt);
}
case PACKAGE: {
PackageElement packageElt = (PackageElement)elt;
return Package.create(packageElt);
}
case METHOD: {
ExecutableElement packageElt = (ExecutableElement)elt;
return Method.create(packageElt);
}
default:
throw new UnsupportedOperationException("Element " + elt + " with kind " + kind + " not supported");
}
}
public final E get(ProcessingEnvironment env) {
try {
return doGet(env);
}
catch (RuntimeException e) {
if (e.getClass().getName().equals("org.eclipse.jdt.internal.compiler.problem.AbortCompilation")) {
// In case of eclipse we catch it and return null instead
return null;
}
else {
// Rethrow
throw e;
}
}
}
protected abstract E doGet(ProcessingEnvironment env);
public abstract Name getPackageName();
public abstract boolean equals(Object obj);
public abstract int hashCode();
public abstract String toString();
public static class Package extends ElementHandle {
public static Package create(Name packageName) {
return new Package(packageName);
}
public static Package create(PackageElement elt) {
return new Package(Name.parse(elt.getQualifiedName()));
}
/** . */
private final Name name;
private Package(Name name) {
this.name = name;
}
@Override
public Name getPackageName() {
return name;
}
@Override
protected PackageElement doGet(ProcessingEnvironment env) {
return env.getElementUtils().getPackageElement(name);
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
else if (obj instanceof Package) {
Package that = (Package)obj;
return name.equals(that.name);
}
return false;
}
@Override
public int hashCode() {
return name.hashCode();
}
@Override
public String toString() {
return "ElementHandle.Package[name=" + name + "]";
}
}
public static class Type extends ElementHandle {
public static Type create(Name fqn) {
return new Type(fqn);
}
public static Type create(TypeElement elt) {
return new Type(Name.parse(elt.getQualifiedName().toString()));
}
/** . */
private final Name name;
private Type(Name name) {
this.name = name;
}
public Name getName() {
return name;
}
@Override
public Name getPackageName() {
return name.getParent();
}
@Override
protected TypeElement doGet(ProcessingEnvironment env) {
return env.getElementUtils().getTypeElement(name);
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
else if (obj instanceof Type) {
Type that = (Type)obj;
return name.equals(that.name);
}
return false;
}
@Override
public int hashCode() {
return name.hashCode();
}
@Override
public String toString() {
return "ElementHandle.Class[name=" + name + "]";
}
}
public static class Method extends ElementHandle {
public static Method create(String type, String name, String... parameterTypes) {
ArrayList tmp = new ArrayList(parameterTypes.length);
Collections.addAll(tmp, parameterTypes);
return new Method(Name.parse(type), name, tmp);
}
public static Method create(java.lang.Class type, String name, java.lang.Class... parameterTypes) {
String[] tmp = new String[parameterTypes.length];
for (int i = 0;i < parameterTypes.length;i++) {
tmp[i] = parameterTypes[i].getName();
}
return create(type.getName(), name, tmp);
}
public static Method create(Name fqn, String name, Collection parameterTypes) {
return new Method(fqn, name, new ArrayList(parameterTypes));
}
public static Method create(ExecutableElement elt) {
TypeElement typeElt = (TypeElement)elt.getEnclosingElement();
String name = elt.getSimpleName().toString();
Name fqn = Name.parse(typeElt.getQualifiedName().toString());
ArrayList parameterTypes = new ArrayList();
for (TypeMirror parameterType : ((ExecutableType)elt.asType()).getParameterTypes()) {
parameterTypes.add(parameterType.toString());
}
return new Method(fqn, name, parameterTypes);
}
private Method(Name type, String name, ArrayList parameterTypes) {
this.type = new Type(type);
this.name = name;
this.parameterTypes = parameterTypes;
}
/** . */
private final Type type;
/** . */
private final String name;
/** . */
private final ArrayList parameterTypes;
public Type getType() {
return type;
}
public Name getTypeName() {
return type.name;
}
@Override
public Name getPackageName() {
return type.name.getParent();
}
public String getName() {
return name;
}
public List getParameterTypes() {
return parameterTypes;
}
@Override
protected ExecutableElement doGet(ProcessingEnvironment env) {
TypeElement typeElt = env.getElementUtils().getTypeElement(type.name);
if (typeElt != null) {
next:
for (ExecutableElement executableElement : ElementFilter.methodsIn(typeElt.getEnclosedElements())) {
if (executableElement.getSimpleName().toString().equals(name)) {
List parameterTypes = ((ExecutableType)executableElement.asType()).getParameterTypes();
int len = parameterTypes.size();
if (len == this.parameterTypes.size()) {
for (int i = 0;i < len;i++) {
if (!parameterTypes.get(i).toString().equals(this.parameterTypes.get(i))) {
continue next;
}
}
return executableElement;
}
}
}
}
return null;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
else if (obj instanceof Method) {
Method that = (Method)obj;
return type.equals(that.type) && name.equals(that.name) && parameterTypes.equals(that.parameterTypes);
}
return false;
}
@Override
public int hashCode() {
int hashCode = type.hashCode() ^ name.hashCode();
for (String parameterType : parameterTypes) {
hashCode = hashCode * 41 + parameterType.hashCode();
}
return hashCode;
}
public MethodHandle getMethodHandle() {
return new MethodHandle(type.name.toString(), name, parameterTypes.toArray(new String[parameterTypes.size()]));
}
@Override
public String toString() {
return "ElementHandle.Method[type=" + type.name + ",name=" + name + ",parameterTypes" + parameterTypes + "]";
}
}
public static class Field extends ElementHandle {
public static Field create(VariableElement elt) {
TypeElement typeElt = (TypeElement)elt.getEnclosingElement();
String name = elt.getSimpleName().toString();
Name fqn = Name.parse(typeElt.getQualifiedName().toString());
return new Field(fqn, name);
}
public static Field create(String fqn, String name) {
return new Field(Name.parse(fqn), name);
}
public static Field create(Name fqn, String name) {
return new Field(fqn, name);
}
/** . */
private final Type type;
/** . */
private final String name;
private Field(Name type, String name) {
this.type = new Type(type);
this.name = name;
}
public Type getType() {
return type;
}
public Name getTypeName() {
return type.name;
}
public String getName() {
return name;
}
@Override
public Name getPackageName() {
return type.name.getParent();
}
@Override
protected VariableElement doGet(ProcessingEnvironment env) {
TypeElement typeElt = env.getElementUtils().getTypeElement(type.name);
if (typeElt != null) {
for (VariableElement variableElt : ElementFilter.fieldsIn(typeElt.getEnclosedElements())) {
if (variableElt.getSimpleName().contentEquals(name)) {
return variableElt;
}
}
}
return null;
}
@Override
public boolean equals(Object obj) {
if (obj == this) {
return true;
}
else if (obj instanceof Field) {
Field that = (Field)obj;
return type.equals(that.type) && name.equals(that.name);
}
return false;
}
@Override
public int hashCode() {
return type.hashCode() ^ name.hashCode();
}
@Override
public String toString() {
return "ElementHandle.Field[type=" + type.name + ",name=" + name + "]";
}
}
}
