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/*
* Copyright © 2009 Reinier Zwitserloot and Roel Spilker.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
package lombok.javac;
import java.lang.annotation.Annotation;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import lombok.core.AnnotationValues;
import lombok.core.TypeLibrary;
import lombok.core.TypeResolver;
import lombok.core.AST.Kind;
import lombok.core.AnnotationValues.AnnotationValue;
import lombok.javac.JavacAST.Node;
import com.sun.tools.javac.tree.JCTree.JCAnnotation;
import com.sun.tools.javac.tree.JCTree.JCAssign;
import com.sun.tools.javac.tree.JCTree.JCExpression;
import com.sun.tools.javac.tree.JCTree.JCFieldAccess;
import com.sun.tools.javac.tree.JCTree.JCIdent;
import com.sun.tools.javac.tree.JCTree.JCLiteral;
import com.sun.tools.javac.tree.JCTree.JCNewArray;
import com.sun.tools.javac.util.JCDiagnostic.DiagnosticPosition;
/**
* Container for static utility methods relevant to lombok's operation on javac.
*/
public class Javac {
private Javac() {
//prevent instantiation
}
/**
* Checks if the Annotation AST Node provided is likely to be an instance of the provided annotation type.
*
* @param type An actual annotation type, such as <code>lombok.Getter.class</code>.
* @param node A Lombok AST node representing an annotation in source code.
*/
public static boolean annotationTypeMatches(Class<? extends Annotation> type, Node node) {
if ( node.getKind() != Kind.ANNOTATION ) return false;
String typeName = ((JCAnnotation)node.get()).annotationType.toString();
TypeLibrary library = new TypeLibrary();
library.addType(type.getName());
TypeResolver resolver = new TypeResolver(library, node.getPackageDeclaration(), node.getImportStatements());
Collection<String> typeMatches = resolver.findTypeMatches(node, typeName);
for ( String match : typeMatches ) {
if ( match.equals(type.getName()) ) return true;
}
return false;
}
/**
* Creates an instance of <code>AnnotationValues</code> for the provided AST Node.
*
* @param type An annotation class type, such as <code>lombok.Getter.class</code>.
* @param node A Lombok AST node representing an annotation in source code.
*/
public static <A extends Annotation> AnnotationValues<A> createAnnotation(Class<A> type, final Node node) {
Map<String, AnnotationValue> values = new HashMap<String, AnnotationValue>();
JCAnnotation anno = (JCAnnotation) node.get();
List<JCExpression> arguments = anno.getArguments();
for ( Method m : type.getDeclaredMethods() ) {
if ( !Modifier.isPublic(m.getModifiers()) ) continue;
String name = m.getName();
List<String> raws = new ArrayList<String>();
List<Object> guesses = new ArrayList<Object>();
final List<DiagnosticPosition> positions = new ArrayList<DiagnosticPosition>();
for ( JCExpression arg : arguments ) {
JCAssign assign = (JCAssign) arg;
String mName = assign.lhs.toString();
if ( !mName.equals(name) ) continue;
JCExpression rhs = assign.rhs;
if ( rhs instanceof JCNewArray ) {
List<JCExpression> elems = ((JCNewArray)rhs).elems;
for ( JCExpression inner : elems ) {
raws.add(inner.toString());
guesses.add(calculateGuess(inner));
positions.add(inner.pos());
}
} else {
raws.add(rhs.toString());
guesses.add(calculateGuess(rhs));
positions.add(rhs.pos());
}
}
values.put(name, new AnnotationValue(node, raws, guesses) {
@Override public void setError(String message, int valueIdx) {
node.addError(message, positions.get(valueIdx));
}
});
}
return new AnnotationValues<A>(type, values, node);
}
/**
* Turns an expression into a guessed intended literal. Only works for literals, as you can imagine.
*
* Will for example turn a TrueLiteral into 'Boolean.valueOf(true)'.
*/
private static Object calculateGuess(JCExpression expr) {
if ( expr instanceof JCLiteral ) {
JCLiteral lit = (JCLiteral)expr;
if ( lit.getKind() == com.sun.source.tree.Tree.Kind.BOOLEAN_LITERAL ) {
return ((Number)lit.value).intValue() == 0 ? false : true;
}
return lit.value;
} else if ( expr instanceof JCIdent || expr instanceof JCFieldAccess ) {
String x = expr.toString();
if ( x.endsWith(".class") ) x = x.substring(0, x.length() - 6);
else {
int idx = x.lastIndexOf('.');
if ( idx > -1 ) x = x.substring(idx + 1);
}
return x;
} else return null;
}
}
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