com.sun.tools.javac.tree.JCTree.JCIdent Java Examples

private static boolean isUnused(
    JCCompilationUnit unit, Set<String> usedNames, JCImport importTree) {
  String simpleName =
      importTree.getQualifiedIdentifier() instanceof JCIdent
          ? ((JCIdent) importTree.getQualifiedIdentifier()).getName().toString()
          : ((JCFieldAccess) importTree.getQualifiedIdentifier()).getIdentifier().toString();
  String qualifier =
      ((JCFieldAccess) importTree.getQualifiedIdentifier()).getExpression().toString();
  if (qualifier.equals("java.lang")) {
    return true;
  }
  if (unit.getPackageName() != null && unit.getPackageName().toString().equals(qualifier)) {
    // remove imports of classes from the current package
    return true;
  }
  if (importTree.getQualifiedIdentifier() instanceof JCFieldAccess
      && ((JCFieldAccess) importTree.getQualifiedIdentifier())
          .getIdentifier()
          .contentEquals("*")) {
    return false;
  }
  if (usedNames.contains(simpleName)) {
    return false;
  }
  return true;
}
 

public void visitIdent(JCIdent tree) {
    Type et = tree.sym.erasure(types);

    // Map type variables to their bounds.
    if (tree.sym.kind == TYP && tree.sym.type.hasTag(TYPEVAR)) {
        result = make.at(tree.pos).Type(et);
    } else
    // Map constants expressions to themselves.
    if (tree.type.constValue() != null) {
        result = tree;
    }
    // Insert casts of variable uses as needed.
    else if (tree.sym.kind == VAR) {
        result = retype(tree, et, pt);
    }
    else {
        tree.type = erasure(tree.type);
        result = tree;
    }
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

/** Construct definition of an access constructor.
 *  @param pos        The source code position of the definition.
 *  @param constr     The private constructor.
 *  @param accessor   The access method for the constructor.
 */
JCTree accessConstructorDef(int pos, Symbol constr, MethodSymbol accessor) {
    make.at(pos);
    JCMethodDecl md = make.MethodDef(accessor,
                                  accessor.externalType(types),
                                  null);
    JCIdent callee = make.Ident(names._this);
    callee.sym = constr;
    callee.type = constr.type;
    md.body =
        make.Block(0, List.of(
            make.Call(
                make.App(
                    callee,
                    make.Idents(md.params.reverse().tail.reverse())))));
    return md;
}
 

/**
 * Translate identifiers within a lambda to the mapped identifier
 * @param tree
 */
@Override
public void visitIdent(JCIdent tree) {
    if (context == null || !analyzer.lambdaIdentSymbolFilter(tree.sym)) {
        super.visitIdent(tree);
    } else {
        int prevPos = make.pos;
        try {
            make.at(tree);

            LambdaTranslationContext lambdaContext = (LambdaTranslationContext) context;
            JCTree ltree = lambdaContext.translate(tree);
            if (ltree != null) {
                result = ltree;
            } else {
                //access to untranslated symbols (i.e. compile-time constants,
                //members defined inside the lambda body, etc.) )
                super.visitIdent(tree);
            }
        } finally {
            make.at(prevPos);
        }
    }
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        Object[] staticArgs = new Object[arity.arity];
        for (int i = 0; i < arity.arity ; i++) {
            staticArgs[i] = saks[i].getValue(syms, names, types);
        }
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, staticArgs);
    }
    return null;
}
 

/**
 * 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)'.
 */
public 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;
}
 

public void visitAnnotation(JCAnnotation tree) {
	try {
		print("@");
		printExpr(tree.annotationType);
		if (tree.args.nonEmpty()) {
			print("(");
			if (tree.args.length() == 1 && tree.args.get(0) instanceof JCAssign) {
				 JCExpression lhs = ((JCAssign)tree.args.get(0)).lhs;
				 if (lhs instanceof JCIdent && ((JCIdent)lhs).name.toString().equals("value")) tree.args = List.of(((JCAssign)tree.args.get(0)).rhs);
			}
			printExprs(tree.args);
			print(")");
		}
	} catch (IOException e) {
		throw new UncheckedIOException(e);
	}
}
 

public static boolean isConstructorCall(final JCStatement statement) {
	if (!(statement instanceof JCExpressionStatement)) return false;
	JCExpression expr = ((JCExpressionStatement) statement).expr;
	if (!(expr instanceof JCMethodInvocation)) return false;
	JCExpression invocation = ((JCMethodInvocation) expr).meth;
	String name;
	if (invocation instanceof JCFieldAccess) {
		name = ((JCFieldAccess) invocation).name.toString();
	} else if (invocation instanceof JCIdent) {
		name = ((JCIdent) invocation).name.toString();
	} else {
		name = "";
	}
	
	return "super".equals(name) || "this".equals(name);
}
 

private static boolean delegatingConstructor(List<JCStatement> stats) {
  if (stats.isEmpty()) {
    return false;
  }
  JCStatement stat = stats.get(0);
  if (stat.getKind() != Kind.EXPRESSION_STATEMENT) {
    return false;
  }
  JCExpression expr = ((JCExpressionStatement) stat).getExpression();
  if (expr.getKind() != Kind.METHOD_INVOCATION) {
    return false;
  }
  JCExpression method = ((JCMethodInvocation) expr).getMethodSelect();
  Name name;
  switch (method.getKind()) {
    case IDENTIFIER:
      name = ((JCIdent) method).getName();
      break;
    case MEMBER_SELECT:
      name = ((JCFieldAccess) method).getIdentifier();
      break;
    default:
      return false;
  }
  return name.contentEquals("this") || name.contentEquals("super");
}
 

@Override
public String next() {
    Name name;
    if (next instanceof JCIdent) {
        name = ((JCIdent) next).name;
        next = null;
    } else {
        JCFieldAccess fa = (JCFieldAccess) next;
        name = fa.name;
        next = fa.selected;
    }
    return name.toString();
}
 

private static boolean isThisExpression(JCExpression expression) {
  if (expression instanceof JCIdent) {
    JCIdent ident = (JCIdent) expression;
    return ident.getName().contentEquals("this");
  }
  return false;
}
 

private static MethodSymbol getMemberSymbol(JCTree.JCExpression node) {
  switch (node.getKind()) {
    case IDENTIFIER:
      return (MethodSymbol) ((JCTree.JCIdent) node).sym.baseSymbol();
    case MEMBER_SELECT:
      return (MethodSymbol) ((JCTree.JCFieldAccess) node).sym;
    default:
      throw new AssertionError("Unexpected tree kind: " + node.getKind());
  }
}
 

public void checkModuleName (JCModuleDecl tree) {
    Name moduleName = tree.sym.name;
    Assert.checkNonNull(moduleName);
    if (lint.isEnabled(LintCategory.MODULE)) {
        JCExpression qualId = tree.qualId;
        while (qualId != null) {
            Name componentName;
            DiagnosticPosition pos;
            switch (qualId.getTag()) {
                case SELECT:
                    JCFieldAccess selectNode = ((JCFieldAccess) qualId);
                    componentName = selectNode.name;
                    pos = selectNode.pos();
                    qualId = selectNode.selected;
                    break;
                case IDENT:
                    componentName = ((JCIdent) qualId).name;
                    pos = qualId.pos();
                    qualId = null;
                    break;
                default:
                    throw new AssertionError("Unexpected qualified identifier: " + qualId.toString());
            }
            if (componentName != null) {
                String moduleNameComponentString = componentName.toString();
                int nameLength = moduleNameComponentString.length();
                if (nameLength > 0 && Character.isDigit(moduleNameComponentString.charAt(nameLength - 1))) {
                    log.warning(Lint.LintCategory.MODULE, pos, Warnings.PoorChoiceForModuleName(componentName));
                }
            }
        }
    }
}
 

public void visitIdent(JCIdent tree) {
	try {
		print(tree.name);
	} catch (IOException e) {
		throw new UncheckedIOException(e);
	}
}
 

private boolean isNoArgsSuperCall(JCExpression expr) {
	if (!(expr instanceof JCMethodInvocation)) return false;
	JCMethodInvocation tree = (JCMethodInvocation) expr;
	if (!tree.typeargs.isEmpty() || !tree.args.isEmpty()) return false;
	if (!(tree.meth instanceof JCIdent)) return false;
	return ((JCIdent) tree.meth).name.toString().equals("super");
}
 

@Override
public Void visitMethodInvocation(MethodInvocationTree node, Void p) {
    super.visitMethodInvocation(node, p);
    JCMethodInvocation apply = (JCMethodInvocation)node;
    JCIdent ident = (JCIdent)apply.meth;
    Symbol oldSym = ident.sym;
    if (!oldSym.isConstructor()) {
        ident.sym = new Symbol.DynamicMethodSymbol(oldSym.name,
                oldSym.owner, REF_invokeStatic, bsm, oldSym.type, new Object[0]);
    }
    return null;
}
 

private static boolean isSuperExpression(JCExpression expression) {
  if (expression instanceof JCIdent) {
    JCIdent ident = (JCIdent) expression;
    return ident.getName().contentEquals("super");
  }
  return false;
}
 

private Expression convertIdent(JCIdent identifier) {
  if (isThisExpression(identifier)) {
    return new ThisReference(getCurrentType().getTypeDescriptor());
  }
  if (isSuperExpression(identifier)) {
    return new SuperReference(getCurrentType().getTypeDescriptor());
  }
  Symbol symbol = identifier.sym;
  if (symbol instanceof ClassSymbol) {
    return new JavaScriptConstructorReference(
        environment.createDeclarationForType((ClassSymbol) identifier.sym));
  }
  if (symbol instanceof MethodSymbol) {
    return NullLiteral.get().withComment(identifier.toString());
  }

  VarSymbol varSymbol = (VarSymbol) symbol;
  if (symbol.getKind() == ElementKind.LOCAL_VARIABLE
      || symbol.getKind() == ElementKind.RESOURCE_VARIABLE
      || symbol.getKind() == ElementKind.PARAMETER
      || symbol.getKind() == ElementKind.EXCEPTION_PARAMETER) {
    Variable variable = variableByVariableElement.get(symbol);
    return resolveVariableReference(variable);
  }

  FieldDescriptor fieldDescriptor = environment.createFieldDescriptor(varSymbol, identifier.type);
  Expression qualifier =
      fieldDescriptor.isStatic()
          ? null
          : resolveOuterClassReference(fieldDescriptor.getEnclosingTypeDescriptor(), false);
  return FieldAccess.newBuilder()
      .setQualifier(qualifier)
      .setTargetFieldDescriptor(fieldDescriptor)
      .build();
}
 

public void doAssignmentCheck0(JavacNode node, JCTree statement, Name name) {
	if (statement instanceof JCAssign) doAssignmentCheck0(node, ((JCAssign)statement).rhs, name);
	if (statement instanceof JCExpressionStatement) doAssignmentCheck0(node,
			((JCExpressionStatement)statement).expr, name);
	if (statement instanceof JCVariableDecl) doAssignmentCheck0(node, ((JCVariableDecl)statement).init, name);
	if (statement instanceof JCTypeCast) doAssignmentCheck0(node, ((JCTypeCast)statement).expr, name);
	if (statement instanceof JCIdent) {
		if (((JCIdent)statement).name.contentEquals(name)) {
			JavacNode problemNode = node.getNodeFor(statement);
			if (problemNode != null) problemNode.addWarning(
			"You're assigning an auto-cleanup variable to something else. This is a bad idea.");
		}
	}
}
 

private VariableDeclarationExpression toResource(JCIdent ident) {
  // Create temporary variables for resources declared outside of the try statement.
  Expression expression = convertIdent(ident);
  return VariableDeclarationExpression.newBuilder()
      .addVariableDeclaration(
          Variable.newBuilder()
              .setName("$resource")
              .setTypeDescriptor(expression.getTypeDescriptor())
              .setFinal(true)
              .build(),
          expression)
      .build();
}
 

/**
 * Checks if the statement is of the form 'if (x == null) {throw WHATEVER;},
 * where the block braces are optional. If it is of this form, returns "x".
 * If it is not of this form, returns null.
 */
public String returnVarNameIfNullCheck(JCStatement stat) {
	if (!(stat instanceof JCIf)) return null;
	
	/* Check that the if's statement is a throw statement, possibly in a block. */ {
		JCStatement then = ((JCIf) stat).thenpart;
		if (then instanceof JCBlock) {
			List<JCStatement> stats = ((JCBlock) then).stats;
			if (stats.length() == 0) return null;
			then = stats.get(0);
		}
		if (!(then instanceof JCThrow)) return null;
	}
	
	/* Check that the if's conditional is like 'x == null'. Return from this method (don't generate
	   a nullcheck) if 'x' is equal to our own variable's name: There's already a nullcheck here. */ {
		JCExpression cond = ((JCIf) stat).cond;
		while (cond instanceof JCParens) cond = ((JCParens) cond).expr;
		if (!(cond instanceof JCBinary)) return null;
		JCBinary bin = (JCBinary) cond;
		if (!CTC_EQUAL.equals(treeTag(bin))) return null;
		if (!(bin.lhs instanceof JCIdent)) return null;
		if (!(bin.rhs instanceof JCLiteral)) return null;
		if (!CTC_BOT.equals(typeTag(bin.rhs))) return null;
		return ((JCIdent) bin.lhs).name.toString();
	}
}
 

private VariableDeclarationExpression toResource(JCTree resourceTree) {
  if (resourceTree.getTag() == Tag.VARDEF) {
    return createVariableDeclarationExpression((JCVariableDecl) resourceTree);
  }
  checkArgument(resourceTree.getTag() == Tag.IDENT);
  return toResource((JCIdent) resourceTree);
}
 

private String methodNameOf(final JCMethodInvocation methodCall) {
	if (methodCall.meth instanceof JCIdent) {
		return ((JCIdent) methodCall.meth).name.toString();
	} else {
		return ((JCFieldAccess) methodCall.meth).name.toString();
	}
}