/** {@inheritDoc} */
@Override
public boolean isValidOn(final DetailAST ast) {
final int type = ast.getType();
return type == TokenTypes.PACKAGE_DEF
|| type == TokenTypes.CLASS_DEF
|| type == TokenTypes.INTERFACE_DEF
|| type == TokenTypes.ENUM_DEF
|| type == TokenTypes.ANNOTATION_DEF
|| type == TokenTypes.METHOD_DEF
|| type == TokenTypes.CTOR_DEF
|| type == TokenTypes.VARIABLE_DEF && !ScopeUtils.isLocalVariableDef(ast);
}
@Override
public void visitToken(DetailAST ast) {
// do not check local variables and
// fields declared in interface/annotations
if (ScopeUtils.isLocalVariableDef(ast) || ScopeUtils.inInterfaceOrAnnotationBlock(ast)) {
return;
}
final DetailAST assign = ast.findFirstToken(TokenTypes.ASSIGN);
if (assign == null) {
// no assign - no check
return;
}
final DetailAST modifiers = ast.findFirstToken(TokenTypes.MODIFIERS);
if (modifiers != null && modifiers.branchContains(TokenTypes.FINAL)) {
// do not check final variables
return;
}
final DetailAST type = ast.findFirstToken(TokenTypes.TYPE);
final DetailAST ident = ast.findFirstToken(TokenTypes.IDENT);
final DetailAST exprStart = assign.getFirstChild().getFirstChild();
if (isObjectType(type) && exprStart.getType() == TokenTypes.LITERAL_NULL) {
log(ident, MSG_KEY, ident.getText(), "null");
}
final int primitiveType = type.getFirstChild().getType();
if (primitiveType == TokenTypes.LITERAL_BOOLEAN
&& exprStart.getType() == TokenTypes.LITERAL_FALSE) {
log(ident, MSG_KEY, ident.getText(), "false");
}
if (isNumericType(primitiveType) && isZero(exprStart)) {
log(ident, MSG_KEY, ident.getText(), "0");
}
if (primitiveType == TokenTypes.LITERAL_CHAR
&& (isZero(exprStart)
|| exprStart.getType() == TokenTypes.CHAR_LITERAL
&& "'\\0'".equals(exprStart.getText()))) {
log(ident, MSG_KEY, ident.getText(), "\\0");
}
}
/** {@inheritDoc} */
@Override
public boolean isValidOn(final DetailAST ast) {
final int type = ast.getType();
return type == TokenTypes.VARIABLE_DEF && !ScopeUtils.isLocalVariableDef(ast);
}