D4Attributes.cc

// -*- mode: c++; c-basic-offset:4 -*-
 
// This file is part of libdap, A C++ implementation of the OPeNDAP Data
// Access Protocol.
 
// Copyright (c) 2013 OPeNDAP, Inc.
// Author: James Gallagher <jgallagher@opendap.org>
//
// This library 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 2.1 of the License, or (at your option) any later version.
//
// This library 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 library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//
// You can contact OPeNDAP, Inc. at PO Box 112, Saunderstown, RI. 02874-0112.
 
#include "config.h"
 
//#define DODS_DEBUG
 
#include "D4Attributes.h"
#include "D4AttributeType.h"
#include "InternalErr.h"
 
#include "AttrTable.h"
 
#include "util.h"
#include "debug.h"
 
namespace libdap {
 
string D4AttributeTypeToString(D4AttributeType at)
{
    switch(at) {
        case attr_null_c:
            return "null";
 
        case attr_byte_c:
            return "Byte";
 
        case attr_int16_c:
            return "Int16";
 
        case attr_uint16_c:
            return "UInt16";
 
        case attr_int32_c:
            return "Int32";
 
        case attr_uint32_c:
            return "UInt32";
 
        case attr_float32_c:
            return "Float32";
 
        case attr_float64_c:
            return "Float64";
 
        case attr_str_c:
            return "String";
 
        case attr_url_c:
            return "Url";
 
        // Added for DAP4
        case attr_int8_c:
            return "Int8";
 
        case attr_uint8_c:
            return "UInt8";
 
        case attr_int64_c:
            return "Int64";
 
        case attr_uint64_c:
            return "UInt64";
 
        case attr_enum_c:
            return "Enum";
 
        case attr_opaque_c:
            return "Opaque";
 
        // These are specific to attributes while the other types are
        // also supported by the variables. jhrg 4/17/13
        case attr_container_c:
            return "Container";
 
        case attr_otherxml_c:
            return "OtherXML";
 
        default:
            throw InternalErr(__FILE__, __LINE__, "Unsupported attribute type");
    }
}
 
D4AttributeType StringToD4AttributeType(string s)
{
    downcase(s);
 
    if (s == "container")
        return attr_container_c;
 
    else if (s == "byte")
        return attr_byte_c;
    else if (s == "int8")
        return attr_int8_c;
    else if (s == "uint8")
        return attr_uint8_c;
    else if (s == "int16")
        return attr_int16_c;
    else if (s == "uint16")
        return attr_uint16_c;
    else if (s == "int32")
        return attr_int32_c;
    else if (s == "uint32")
        return attr_uint32_c;
    else if (s == "int64")
        return attr_int64_c;
    else if (s == "uint64")
        return attr_uint64_c;
 
    else if (s == "float32")
        return attr_float32_c;
    else if (s == "float64")
        return attr_float64_c;
 
    else if (s == "string")
        return attr_str_c;
    else if (s == "url")
        return attr_url_c;
    else if (s == "otherxml")
        return attr_otherxml_c;
    else
        return attr_null_c;
}
 
void
D4Attribute::m_duplicate(const D4Attribute &src)
{
    d_name = src.d_name;
    d_type = src.d_type;
    d_values = src.d_values;
    if (src.d_attributes)
        d_attributes = new D4Attributes(*src.d_attributes);
    else
        d_attributes = 0;
}
 
D4Attribute::D4Attribute(const D4Attribute &src)
{
    m_duplicate(src);
}
 
D4Attribute::~D4Attribute()
{
    delete d_attributes;
}
 
D4Attribute &
D4Attribute::operator=(const D4Attribute &rhs)
{
    if (this == &rhs) return *this;
    m_duplicate(rhs);
    return *this;
}
 
D4Attributes *
D4Attribute::attributes()
{
    if (!d_attributes) d_attributes = new D4Attributes();
    return d_attributes;
}
 
void
D4Attributes::transform_to_dap4(AttrTable &at)
{
        // for every attribute in at, copy it to this.
        for (AttrTable::Attr_iter i = at.attr_begin(), e = at.attr_end(); i != e; ++i) {
                string name = at.get_name(i);
                AttrType type = at.get_attr_type(i);
 
                switch (type) {
                case Attr_container: {
                        D4Attribute *a = new D4Attribute(name, attr_container_c);
                        D4Attributes *attributes = a->attributes(); // allocates a new object
                        attributes->transform_to_dap4(*at.get_attr_table(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_byte: {
                        D4Attribute *a = new D4Attribute(name, attr_byte_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_int16: {
                        D4Attribute *a = new D4Attribute(name, attr_int16_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_uint16: {
                        D4Attribute *a = new D4Attribute(name, attr_uint16_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_int32: {
                        D4Attribute *a = new D4Attribute(name, attr_int32_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_uint32: {
                        D4Attribute *a = new D4Attribute(name, attr_uint32_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_float32: {
                        D4Attribute *a = new D4Attribute(name, attr_float32_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_float64: {
                        D4Attribute *a = new D4Attribute(name, attr_float64_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_string: {
                        D4Attribute *a = new D4Attribute(name, attr_str_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_url: {
                        D4Attribute *a = new D4Attribute(name, attr_url_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                case Attr_other_xml: {
                        D4Attribute *a = new D4Attribute(name, attr_otherxml_c);
                        a->add_value_vector(*at.get_attr_vector(i));
                        add_attribute_nocopy(a);
                        break;
                }
                default:
                        throw InternalErr(__FILE__, __LINE__, "Unknown DAP2 attribute type in D4Attributes::copy_from_dap2()");
                }
        }
}
 
D4Attribute *
D4Attributes::find_depth_first(const string &name, D4AttributesIter i)
{
    if (i == attribute_end())
        return 0;
    else if ((*i)->name() == name)
        return *i;
    else if ((*i)->type() == attr_container_c)
        return find_depth_first(name, (*i)->attributes()->attribute_begin());
    else
        return find_depth_first(name, ++i);
}
 
D4Attribute *
D4Attributes::find(const string &name)
{
    return find_depth_first(name, attribute_begin());
}
 
D4Attribute *
D4Attributes::get(const string &fqn)
{
    // name1.name2.name3
    // name1
    // name1.name2
    size_t pos = fqn.find('.');
    string part = fqn.substr(0, pos);
    string rest= "";
 
    if (pos != string::npos)
        rest = fqn.substr(pos + 1);
 
    DBG(cerr << "part: '" << part << "'; rest: '" << rest << "'" << endl);
 
    if (!part.empty()) {
        if (!rest.empty()) {
            D4AttributesIter i = attribute_begin();
            while (i != attribute_end()) {
                if ((*i)->name() == part && (*i)->type() == attr_container_c)
                    return (*i)->attributes()->get(rest);
                ++i;
            }
        }
        else {
            D4AttributesIter i = attribute_begin();
            while (i != attribute_end()) {
                if ((*i)->name() == part)
                    return (*i);
                ++i;
            }
        }
    }
 
    return 0;
}
 
void
D4Attribute::print_dap4(XMLWriter &xml) const
{
    if (xmlTextWriterStartElement(xml.get_writer(), (const xmlChar*) "Attribute") < 0)
        throw InternalErr(__FILE__, __LINE__, "Could not write Attribute element");
    if (xmlTextWriterWriteAttribute(xml.get_writer(), (const xmlChar*) "name", (const xmlChar*)name().c_str()) < 0)
        throw InternalErr(__FILE__, __LINE__, "Could not write attribute for name");
    if (xmlTextWriterWriteAttribute(xml.get_writer(), (const xmlChar*) "type", (const xmlChar*) D4AttributeTypeToString(type()).c_str()) < 0)
        throw InternalErr(__FILE__, __LINE__, "Could not write attribute for type");
 
    switch (type()) {
        case attr_container_c:
            if (!d_attributes)
                throw InternalErr(__FILE__, __LINE__, "Null Attribute container");
            d_attributes->print_dap4(xml);
            break;
 
        case attr_otherxml_c:
            if (num_values() != 1)
                throw Error("OtherXML attributes cannot be vector-valued.");
            if (xmlTextWriterWriteRaw(xml.get_writer(), (const xmlChar*) value(0).c_str()) < 0)
                throw InternalErr(__FILE__, __LINE__, "Could not write OtherXML value");
            break;
 
        default: {
            // Assume only valid types make it into instances
            D4AttributeCIter i = d_values.begin();//value_begin();
            while (i != d_values.end()) {
                if (xmlTextWriterStartElement(xml.get_writer(), (const xmlChar*) "Value") < 0)
                    throw InternalErr(__FILE__, __LINE__, "Could not write value element");
 
                if (xmlTextWriterWriteString(xml.get_writer(), (const xmlChar*) (*i++).c_str()) < 0)
                    throw InternalErr(__FILE__, __LINE__, "Could not write attribute value");
 
                if (xmlTextWriterEndElement(xml.get_writer()) < 0)
                    throw InternalErr(__FILE__, __LINE__, "Could not end value element");
            }
 
            break;
        }
    }
 
    if (xmlTextWriterEndElement(xml.get_writer()) < 0)
        throw InternalErr(__FILE__, __LINE__, "Could not end Attribute element");
}
 
void
D4Attribute::dump(ostream &strm) const
{
    strm << DapIndent::LMarg << "D4Attribute::dump - (" << (void *)this << ")" << endl;
 
    DapIndent::Indent() ;
 
    XMLWriter xml;
    print_dap4(xml);
    strm << DapIndent::LMarg << xml.get_doc() << flush;
 
    DapIndent::UnIndent() ;
}
 
 
void
D4Attributes::print_dap4(XMLWriter &xml) const
{
    if (empty())
        return;
 
    D4AttributesCIter i = d_attrs.begin();
    while (i != d_attrs.end()) {
        (*i++)->print_dap4(xml);
    }
}
 
void
D4Attributes::dump(ostream &strm) const
{
    strm << DapIndent::LMarg << "D4Attributes::dump - (" << (void *)this << ")" << endl;
 
    DapIndent::Indent() ;
 
    XMLWriter xml;
    print_dap4(xml);
    strm << DapIndent::LMarg << xml.get_doc() << flush;
 
    DapIndent::UnIndent() ;
}
 
 
} // namespace libdap