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use cassandra::data_type::ConstDataType;
use cassandra::iterator::FieldIterator;
use cassandra::util::Protected;
use cassandra::value::Value;
use cassandra_sys::CassColumnMeta as _CassColumnMeta;
use cassandra_sys::CassColumnType as _CassColumnType;
use cassandra_sys::cass_column_meta_data_type;
use cassandra_sys::cass_column_meta_field_by_name;
use cassandra_sys::cass_column_meta_name;
use cassandra_sys::cass_column_meta_type;
use cassandra_sys::cass_iterator_fields_from_column_meta;
#[derive(Debug)]
pub struct ColumnMeta(*const _CassColumnMeta);
use std::ffi::CString;
use std::mem;
use std::slice;
use std::str;
impl Protected<*const _CassColumnMeta> for ColumnMeta {
fn inner(&self) -> *const _CassColumnMeta { self.0 }
fn build(inner: *const _CassColumnMeta) -> Self { ColumnMeta(inner) }
}
impl ColumnMeta {
pub fn field_iter(&mut self) -> FieldIterator {
unsafe { FieldIterator::build(cass_iterator_fields_from_column_meta(self.0)) }
}
#[allow(cast_possible_truncation)]
pub fn name(&self) -> String {
unsafe {
let mut name = mem::zeroed();
let mut name_length = mem::zeroed();
cass_column_meta_name(self.0, &mut name, &mut name_length);
let slice = slice::from_raw_parts(name as *const u8, name_length as usize);
str::from_utf8(slice).expect("must be utf8").to_owned()
}
}
pub fn get_type(&self) -> _CassColumnType { unsafe { cass_column_meta_type(self.0) } }
pub fn data_type(&self) -> ConstDataType { unsafe { ConstDataType(cass_column_meta_data_type(self.0)) } }
pub fn field_by_name(&self, name: &str) -> Option<Value> {
unsafe {
let field = cass_column_meta_field_by_name(self.0, CString::new(name).expect("must be utf8").as_ptr());
if field.is_null() {
None
} else {
Some(Value::build(field))
}
}
}
}