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/*
* SonarQube Java
* Copyright (C) 2012 SonarSource
* [email protected]
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 3 of the License, or (at your option) any later version.
*
* This program 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02
*/
package org.sonar.java.resolve;
import javax.annotation.Nullable;
import java.util.List;
public class Symbol {
public static final int PCK = 1 << 0;
public static final int TYP = 1 << 1;
public static final int VAR = 1 << 2;
public static final int MTH = 1 << 4;
public static final int ERRONEOUS = 1 << 6;
public static final int AMBIGUOUS = ERRONEOUS + 1;
public static final int ABSENT = ERRONEOUS + 2;
final int kind;
private final int flags;
final String name;
private final Symbol owner;
Completer completer;
Type type;
public Symbol(int kind, int flags, @Nullable String name, @Nullable Symbol owner) {
this.kind = kind;
this.flags = flags;
this.name = name;
this.owner = owner;
}
/**
* @see Flags
*/
public int flags() {
return flags;
}
/**
* The owner of this symbol.
*/
public Symbol owner() {
return owner;
}
interface Completer {
void complete(Symbol symbol);
}
public void complete() {
if (completer != null) {
Completer c = completer;
completer = null;
c.complete(this);
}
}
/**
* The outermost class which indirectly owns this symbol.
*/
public TypeSymbol outermostClass() {
Symbol symbol = this;
Symbol result = null;
while (symbol.kind != PCK) {
result = symbol;
symbol = symbol.owner();
}
return (TypeSymbol) result;
}
/**
* The package which indirectly owns this symbol.
*/
public PackageSymbol packge() {
Symbol result = this;
while (result.kind != PCK) {
result = result.owner();
}
return (PackageSymbol) result;
}
/**
* The closest enclosing class.
*/
public TypeSymbol enclosingClass() {
Symbol result = this;
while (result != null && result.kind != TYP) {
result = result.owner;
}
return (TypeSymbol) result;
}
/**
* Represents package.
*/
public static class PackageSymbol extends Symbol {
Scope members;
public PackageSymbol(@Nullable String name, @Nullable Symbol owner) {
super(PCK, 0, name, owner);
}
}
/**
* Represents a class, interface, enum or annotation type.
*/
public static class TypeSymbol extends Symbol {
Scope members;
public TypeSymbol(int flags, String name, Symbol owner) {
super(TYP, flags, name, owner);
this.type = new Type.ClassType(this);
}
public Type getSuperclass() {
complete();
return ((Type.ClassType) type).supertype;
}
public List getInterfaces() {
complete();
return ((Type.ClassType) type).interfaces;
}
Scope members() {
complete();
return members;
}
}
/**
* Represents a field, enum constant, method or constructor parameter, local variable, resource variable or exception parameter.
*/
public static class VariableSymbol extends Symbol {
public VariableSymbol(int flags, String name, Symbol owner) {
super(VAR, flags, name, owner);
}
public VariableSymbol(int flags, String name, Type type, Symbol owner) {
super(VAR, flags, name, owner);
this.type = type;
}
}
/**
* Represents a method, constructor or initializer (static or instance).
*/
public static class MethodSymbol extends Symbol {
TypeSymbol type;
Scope parameters;
List thrown;
public MethodSymbol(int flags, String name, Type type, Symbol owner) {
super(MTH, flags, name, owner);
super.type = type;
}
public MethodSymbol(int flags, String name, Symbol owner) {
super(MTH, flags, name, owner);
}
public TypeSymbol getReturnType() {
return type;
}
public List getThrownTypes() {
return thrown;
}
}
}
