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package lombok.eclipse;
import static lombok.eclipse.Eclipse.toQualifiedName;
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.Iterator;
import java.util.List;
import java.util.Map;
import java.util.ServiceConfigurationError;
import java.util.ServiceLoader;
import lombok.core.AnnotationValues;
import lombok.core.SpiLoadUtil;
import lombok.core.TypeLibrary;
import lombok.core.TypeResolver;
import lombok.core.AnnotationValues.AnnotationValue;
import lombok.core.AnnotationValues.AnnotationValueDecodeFail;
import lombok.eclipse.EclipseAST.Node;
import org.eclipse.jdt.internal.compiler.ast.ArrayInitializer;
import org.eclipse.jdt.internal.compiler.ast.ClassLiteralAccess;
import org.eclipse.jdt.internal.compiler.ast.CompilationUnitDeclaration;
import org.eclipse.jdt.internal.compiler.ast.Expression;
import org.eclipse.jdt.internal.compiler.ast.Literal;
import org.eclipse.jdt.internal.compiler.ast.MemberValuePair;
import org.eclipse.jdt.internal.compiler.ast.QualifiedNameReference;
import org.eclipse.jdt.internal.compiler.ast.SingleNameReference;
import org.eclipse.jdt.internal.compiler.ast.TypeReference;
import org.eclipse.jdt.internal.compiler.lookup.TypeIds;
public class HandlerLibrary {
private TypeLibrary typeLibrary = new TypeLibrary();
private static class AnnotationHandlerContainer<T extends Annotation> {
private EclipseAnnotationHandler<T> handler;
private Class<T> annotationClass;
AnnotationHandlerContainer(EclipseAnnotationHandler<T> handler, Class<T> annotationClass) {
this.handler = handler;
this.annotationClass = annotationClass;
}
public boolean handle(org.eclipse.jdt.internal.compiler.ast.Annotation annotation,
final Node annotationNode) {
Map<String, AnnotationValue> values = new HashMap<String, AnnotationValue>();
final MemberValuePair[] pairs = annotation.memberValuePairs();
for ( Method m : annotationClass.getDeclaredMethods() ) {
if ( !Modifier.isPublic(m.getModifiers()) ) continue;
String name = m.getName();
List<String> raws = new ArrayList<String>();
List<Object> guesses = new ArrayList<Object>();
Expression fullExpression = null;
Expression[] expressions = null;
if ( pairs != null ) for ( MemberValuePair pair : pairs ) {
char[] n = pair.name;
String mName = n == null ? "value" : new String(name);
if ( !mName.equals(name) ) continue;
fullExpression = pair.value;
}
if ( fullExpression != null ) {
if ( fullExpression instanceof ArrayInitializer ) {
expressions = ((ArrayInitializer)fullExpression).expressions;
} else expressions = new Expression[] { fullExpression };
for ( Expression ex : expressions ) {
StringBuffer sb = new StringBuffer();
ex.print(0, sb);
raws.add(sb.toString());
guesses.add(calculateValue(ex));
}
}
final Expression fullExpr = fullExpression;
final Expression[] exprs = expressions;
values.put(name, new AnnotationValue(annotationNode, raws, guesses) {
@Override public void setError(String message, int valueIdx) {
Expression ex;
if ( valueIdx == -1 ) ex = fullExpr;
else ex = exprs[valueIdx];
int sourceStart = ex.sourceStart;
int sourceEnd = ex.sourceEnd;
annotationNode.addError(message, sourceStart, sourceEnd);
}
});
}
return handler.handle(new AnnotationValues<T>(annotationClass, values, annotationNode), annotation, annotationNode);
}
}
private Map<String, AnnotationHandlerContainer<?>> annotationHandlers =
new HashMap<String, AnnotationHandlerContainer<?>>();
private Collection<EclipseASTVisitor> visitorHandlers = new ArrayList<EclipseASTVisitor>();
private static Object calculateValue(Expression e) {
if ( e instanceof Literal ) {
((Literal)e).computeConstant();
switch ( e.constant.typeID() ) {
case TypeIds.T_int: return e.constant.intValue();
case TypeIds.T_byte: return e.constant.byteValue();
case TypeIds.T_short: return e.constant.shortValue();
case TypeIds.T_char: return e.constant.charValue();
case TypeIds.T_float: return e.constant.floatValue();
case TypeIds.T_double: return e.constant.doubleValue();
case TypeIds.T_boolean: return e.constant.booleanValue();
case TypeIds.T_long: return e.constant.longValue();
case TypeIds.T_JavaLangString: return e.constant.stringValue();
default: return null;
}
} else if ( e instanceof ClassLiteralAccess ) {
return Eclipse.toQualifiedName(((ClassLiteralAccess)e).type.getTypeName());
} else if ( e instanceof SingleNameReference ) {
return new String(((SingleNameReference)e).token);
} else if ( e instanceof QualifiedNameReference ) {
String qName = Eclipse.toQualifiedName(((QualifiedNameReference)e).tokens);
int idx = qName.lastIndexOf('.');
return idx == -1 ? qName : qName.substring(idx+1);
}
return null;
}
public static HandlerLibrary load() {
HandlerLibrary lib = new HandlerLibrary();
loadAnnotationHandlers(lib);
loadVisitorHandlers(lib);
return lib;
}
@SuppressWarnings("unchecked") private static void loadAnnotationHandlers(HandlerLibrary lib) {
Iterator<EclipseAnnotationHandler> it = ServiceLoader.load(EclipseAnnotationHandler.class).iterator();
while ( it.hasNext() ) {
try {
EclipseAnnotationHandler<?> handler = it.next();
Class<? extends Annotation> annotationClass =
SpiLoadUtil.findAnnotationClass(handler.getClass(), EclipseAnnotationHandler.class);
AnnotationHandlerContainer<?> container = new AnnotationHandlerContainer(handler, annotationClass);
if ( lib.annotationHandlers.put(container.annotationClass.getName(), container) != null ) {
Eclipse.error("Duplicate handlers for annotation type: " + container.annotationClass.getName());
}
lib.typeLibrary.addType(container.annotationClass.getName());
} catch ( ServiceConfigurationError e ) {
Eclipse.error("Can't load Lombok annotation handler for eclipse: ", e);
}
}
}
private static void loadVisitorHandlers(HandlerLibrary lib) {
Iterator<EclipseASTVisitor> it = ServiceLoader.load(EclipseASTVisitor.class).iterator();
while ( it.hasNext() ) {
try {
lib.visitorHandlers.add(it.next());
} catch ( ServiceConfigurationError e ) {
Eclipse.error("Can't load Lombok visitor handler for eclipse: ", e);
}
}
}
public boolean handle(CompilationUnitDeclaration ast, EclipseAST.Node annotationNode,
org.eclipse.jdt.internal.compiler.ast.Annotation annotation) {
String pkgName = annotationNode.getPackageDeclaration();
Collection<String> imports = annotationNode.getImportStatements();
TypeResolver resolver = new TypeResolver(typeLibrary, pkgName, imports);
TypeReference rawType = annotation.type;
if ( rawType == null ) return false;
boolean handled = false;
for ( String fqn : resolver.findTypeMatches(annotationNode, toQualifiedName(annotation.type.getTypeName())) ) {
AnnotationHandlerContainer<?> container = annotationHandlers.get(fqn);
if ( container == null ) continue;
try {
handled |= container.handle(annotation, annotationNode);
} catch ( AnnotationValueDecodeFail fail ) {
fail.owner.setError(fail.getMessage(), fail.idx);
} catch ( Throwable t ) {
Eclipse.error(String.format("Lombok annotation handler %s failed", container.handler.getClass()), t);
}
}
return handled;
}
public void callASTVisitors(EclipseAST ast) {
for ( EclipseASTVisitor visitor : visitorHandlers ) try {
ast.traverse(visitor);
} catch ( Throwable t ) {
Eclipse.error(String.format("Lombok visitor handler %s failed", visitor.getClass()), t);
}
}
}
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