Examples with ExpressionTree com.sun.source.tree.ExpressionTree used on opensource projects

Example 16 with ExpressionTree

use of com.sun.source.tree.ExpressionTree in project error-prone by google.

the class SelfAssignment method matchVariable.

@Override
public Description matchVariable(VariableTree tree, VisitorState state) {
    ExpressionTree initializer = stripCheckNotNull(tree.getInitializer(), state);
    Tree parent = state.getPath().getParentPath().getLeaf();
    // must be a static class variable with member select initializer
    if (initializer == null || initializer.getKind() != MEMBER_SELECT || parent.getKind() != CLASS || !tree.getModifiers().getFlags().contains(STATIC)) {
        return Description.NO_MATCH;
    }
    MemberSelectTree rhs = (MemberSelectTree) initializer;
    Symbol rhsClass = ASTHelpers.getSymbol(rhs.getExpression());
    Symbol lhsClass = ASTHelpers.getSymbol(parent);
    if (rhsClass != null && lhsClass != null && rhsClass.equals(lhsClass) && rhs.getIdentifier().contentEquals(tree.getName())) {
        return describeForVarDecl(tree, state);
    }
    return Description.NO_MATCH;
}

Example 17 with ExpressionTree

use of com.sun.source.tree.ExpressionTree in project error-prone by google.

the class SelfEquals method matchMethodInvocation.

@Override
public Description matchMethodInvocation(MethodInvocationTree tree, VisitorState state) {
    if (ASSERTION.matches(state.getPath().getParentPath().getLeaf(), state)) {
        return NO_MATCH;
    }
    List<? extends ExpressionTree> args = tree.getArguments();
    ExpressionTree toReplace;
    if (INSTANCE_MATCHER.matches(tree, state)) {
        toReplace = args.get(0);
    } else if (STATIC_MATCHER.matches(tree, state)) {
        if (args.get(0).getKind() == Kind.IDENTIFIER && args.get(1).getKind() != Kind.IDENTIFIER) {
            toReplace = args.get(0);
        } else {
            toReplace = args.get(1);
        }
    } else {
        return NO_MATCH;
    }
    Description.Builder description = buildDescription(tree);
    Fix fix = fieldFix(toReplace, state);
    if (fix != null) {
        description.addFix(fix);
    }
    return description.build();
}

Example 18 with ExpressionTree

use of com.sun.source.tree.ExpressionTree in project error-prone by google.

the class JUnit3FloatingPointComparisonWithoutDelta method getArgumentTypesWithoutMessage.

/**
   * Gets the argument types, excluding the message argument if present.
   */
private List<Type> getArgumentTypesWithoutMessage(MethodInvocationTree methodInvocationTree, VisitorState state) {
    List<Type> argumentTypes = new ArrayList<>();
    for (ExpressionTree argument : methodInvocationTree.getArguments()) {
        JCTree tree = (JCTree) argument;
        argumentTypes.add(tree.type);
    }
    removeMessageArgumentIfPresent(state, argumentTypes);
    return argumentTypes;
}

Example 19 with ExpressionTree

use of com.sun.source.tree.ExpressionTree in project error-prone by google.

the class ProtoFieldNullComparison method isGetListMethodInvocation.

private static boolean isGetListMethodInvocation(ExpressionTree tree, VisitorState state) {
    if (tree.getKind() == Tree.Kind.METHOD_INVOCATION) {
        MethodInvocationTree method = (MethodInvocationTree) tree;
        if (!method.getArguments().isEmpty()) {
            return false;
        }
        if (!returnsListMatcher.matches(method, state)) {
            return false;
        }
        ExpressionTree expressionTree = method.getMethodSelect();
        if (expressionTree instanceof JCFieldAccess) {
            JCFieldAccess access = (JCFieldAccess) expressionTree;
            String methodName = access.sym.getQualifiedName().toString();
            return isFieldGetMethod(methodName);
        }
        return true;
    }
    return false;
}

Example 20 with ExpressionTree

use of com.sun.source.tree.ExpressionTree in project error-prone by google.

the class ProtoFieldNullComparison method createReplacement.

/**
   * Creates replacements for the following comparisons:
   * <pre>
   * proto.getField() == null --> !proto.hasField()
   * proto.getField() != null --> proto.hasField()
   * proto.getList() == null  --> proto.getList().isEmpty()
   * proto.getList() != null  --> !proto.getList().isEmpty()
   * <pre>
   * Also creates replacements for the Yoda style version of them.
   */
@Nullable
private static String createReplacement(BinaryTree tree, VisitorState state) {
    ExpressionTree leftOperand = tree.getLeftOperand();
    ExpressionTree rightOperand = tree.getRightOperand();
    ExpressionTree methodInvocation;
    if (isNull(leftOperand)) {
        methodInvocation = rightOperand;
    } else {
        methodInvocation = leftOperand;
    }
    if (isGetMethodInvocation(methodInvocation, state)) {
        String methodName = getMethodName(methodInvocation);
        String hasMethod = methodName.replaceFirst("get", "has");
        // proto3 does not generate has methods for scalar types, e.g. ByteString and String.
        // Do not provide a replacement in these cases.
        Set<MethodSymbol> hasMethods = ASTHelpers.findMatchingMethods(state.getName(hasMethod), NO_ARGS, ASTHelpers.getType(ASTHelpers.getReceiver(methodInvocation)), state.getTypes());
        if (hasMethods.isEmpty()) {
            return null;
        }
        String replacement = replaceLast(methodInvocation.toString(), methodName, hasMethod);
        replacement = tree.getKind() == Kind.EQUAL_TO ? "!" + replacement : replacement;
        return replacement;
    } else {
        String replacement = methodInvocation + ".isEmpty()";
        return tree.getKind() == Kind.EQUAL_TO ? replacement : "!" + replacement;
    }
}