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package ftbsc.lll.processor.tools.containers;
import ftbsc.lll.exceptions.AmbiguousDefinitionException;
import ftbsc.lll.processor.annotations.Find;
import ftbsc.lll.processor.annotations.Patch;
import ftbsc.lll.processor.tools.ProcessorOptions;
import org.objectweb.asm.Type;
import javax.lang.model.element.TypeElement;
import javax.lang.model.element.VariableElement;
import javax.lang.model.type.TypeKind;
import javax.lang.model.type.TypeMirror;
import static ftbsc.lll.processor.tools.ASTUtils.*;
/**
* Container for information about a field.
* Used internally for efficiency reasons.
* @since 0.5.0
*/
public class FieldContainer {
/**
* The name of the field.
*/
public final String name;
/**
* The descriptor of the field.
*/
public final String descriptor;
/**
* The obfuscated name of the field.
* If the mapper passed is null, then this will be identical to {@link #name}.
*/
public final String nameObf;
/**
* The obfuscated descriptor of the field.
* If the mapper passed is null, then this will be identical to {@link #descriptor}.
*/
public final String descriptorObf;
/**
* The {@link ClassContainer} representing the parent of this field.
*/
public final ClassContainer parent;
/**
* The {@link VariableElement} corresponding to the field.
* May only be null intentionally i.e. when the field is
* a child of an anonymous class.
*/
public final VariableElement elem;
/**
* Private constructor, called from {@link #from(VariableElement, ProcessorOptions)}.
* @param parent the {@link ClassContainer} representing the parent
* @param name the fully-qualified name of the target field
* @param descriptor the descriptor of the target field, may be null for verifiable fields
* @param options the {@link ProcessorOptions} to be used
*/
private FieldContainer(ClassContainer parent, String name, String descriptor, ProcessorOptions options) {
this.parent = parent;
if(parent.elem == null) { //unverified
if(descriptor == null)
throw new AmbiguousDefinitionException("Cannot use name-based lookups for fields of unverifiable classes!");
this.elem = null;
this.name = name;
this.descriptor = descriptor;
} else {
this.elem = (VariableElement) findMember(parent, name, descriptor, descriptor != null, true, options.env);
this.name = this.elem.getSimpleName().toString();
this.descriptor = descriptorFromType(this.elem.asType(), options.env);
}
this.descriptorObf = options.mapper == null ? this.descriptor : options.mapper.obfuscateType(Type.getType(this.descriptor)).getDescriptor();
this.nameObf = findMemberName(parent.fqn, this.name, null, options.mapper);
}
/**
* Finds a {@link FieldContainer} from a finder.
* @param finder the {@link VariableElement} annotated with {@link Find} for this field
* @param options the {@link ProcessorOptions} to be used
* @return the built {@link FieldContainer}
* @since 0.5.0
*/
public static FieldContainer from(VariableElement finder, ProcessorOptions options) {
//the parent always has a @Patch annotation
Patch patchAnn = finder.getEnclosingElement().getAnnotation(Patch.class);
//the finder always has a @Find annotation
Find f = finder.getAnnotation(Find.class);
ClassContainer parent = ClassContainer.findOrFallback(
ClassContainer.from((TypeElement) finder.getEnclosingElement(), options), patchAnn, f, options
);
String name = f.name().equals("") ? finder.getSimpleName().toString() : f.name();
String descriptor;
TypeMirror fieldType = getTypeFromAnnotation(f, Find::type, options.env);
if(fieldType.toString().equals("java.lang.Object")) {
descriptor = null;
} else {
if(fieldType.getKind() != TypeKind.VOID && !fieldType.getKind().isPrimitive())
descriptor = //jank af but this is temporary anyway
"L" + ClassContainer.from(
f, Find::type, f.typeInner(), options
).fqnObf.replace('.', '/') + ";";
else descriptor = descriptorFromType(fieldType, options.env);
}
return new FieldContainer(parent, name, descriptor, options);
}
}
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