tools/stats_log_api_gen/Collation.cpp - LeafOS-Project/android_frameworks_base - Gitiles

 /*
  * Copyright (C) 2017, The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "Collation.h"
 #include "frameworks/base/cmds/statsd/src/atoms.pb.h"

 #include <stdio.h>
 #include <map>

 namespace android {
 namespace stats_log_api_gen {

 using google::protobuf::EnumDescriptor;
 using google::protobuf::FieldDescriptor;
 using google::protobuf::FileDescriptor;
 using google::protobuf::SourceLocation;
 using std::map;


 //
 // AtomDecl class
 //

 AtomDecl::AtomDecl()
     :code(0),
      name()
 {
 }

 AtomDecl::AtomDecl(const AtomDecl& that)
     : code(that.code),
       name(that.name),
       message(that.message),
       fields(that.fields),
       primaryFields(that.primaryFields),
       exclusiveField(that.exclusiveField),
       uidField(that.uidField) {}

 AtomDecl::AtomDecl(int c, const string& n, const string& m)
     :code(c),
      name(n),
      message(m)
 {
 }

 AtomDecl::~AtomDecl()
 {
 }


 /**
  * Print an error message for a FieldDescriptor, including the file name and line number.
  */
 static void
 print_error(const FieldDescriptor* field, const char* format, ...)
 {
     const Descriptor* message = field->containing_type();
     const FileDescriptor* file = message->file();

     SourceLocation loc;
     if (field->GetSourceLocation(&loc)) {
         // TODO: this will work if we can figure out how to pass --include_source_info to protoc
         fprintf(stderr, "%s:%d: ", file->name().c_str(), loc.start_line);
     } else {
         fprintf(stderr, "%s: ", file->name().c_str());
     }
     va_list args;
     va_start(args, format);
     vfprintf(stderr, format, args);
     va_end (args);
 }

 /**
  * Convert a protobuf type into a java type.
  */
 static java_type_t
 java_type(const FieldDescriptor* field)
 {
     int protoType = field->type();
     switch (protoType) {
         case FieldDescriptor::TYPE_DOUBLE:
             return JAVA_TYPE_DOUBLE;
         case FieldDescriptor::TYPE_FLOAT:
             return JAVA_TYPE_FLOAT;
         case FieldDescriptor::TYPE_INT64:
             return JAVA_TYPE_LONG;
         case FieldDescriptor::TYPE_UINT64:
             return JAVA_TYPE_LONG;
         case FieldDescriptor::TYPE_INT32:
             return JAVA_TYPE_INT;
         case FieldDescriptor::TYPE_FIXED64:
             return JAVA_TYPE_LONG;
         case FieldDescriptor::TYPE_FIXED32:
             return JAVA_TYPE_INT;
         case FieldDescriptor::TYPE_BOOL:
             return JAVA_TYPE_BOOLEAN;
         case FieldDescriptor::TYPE_STRING:
             return JAVA_TYPE_STRING;
         case FieldDescriptor::TYPE_GROUP:
             return JAVA_TYPE_UNKNOWN;
         case FieldDescriptor::TYPE_MESSAGE:
             // TODO: not the final package name
             if (field->message_type()->full_name() ==
                 "android.os.statsd.AttributionNode") {
               return JAVA_TYPE_ATTRIBUTION_CHAIN;
             } else if (field->message_type()->full_name() ==
                        "android.os.statsd.KeyValuePair") {
               return JAVA_TYPE_KEY_VALUE_PAIR;
             } else {
                 return JAVA_TYPE_OBJECT;
             }
         case FieldDescriptor::TYPE_BYTES:
             return JAVA_TYPE_BYTE_ARRAY;
         case FieldDescriptor::TYPE_UINT32:
             return JAVA_TYPE_INT;
         case FieldDescriptor::TYPE_ENUM:
             return JAVA_TYPE_ENUM;
         case FieldDescriptor::TYPE_SFIXED32:
             return JAVA_TYPE_INT;
         case FieldDescriptor::TYPE_SFIXED64:
             return JAVA_TYPE_LONG;
         case FieldDescriptor::TYPE_SINT32:
             return JAVA_TYPE_INT;
         case FieldDescriptor::TYPE_SINT64:
             return JAVA_TYPE_LONG;
         default:
             return JAVA_TYPE_UNKNOWN;
     }
 }

 /**
  * Gather the enums info.
  */
 void collate_enums(const EnumDescriptor &enumDescriptor, AtomField *atomField) {
     for (int i = 0; i < enumDescriptor.value_count(); i++) {
         atomField->enumValues[enumDescriptor.value(i)->number()] =
             enumDescriptor.value(i)->name().c_str();
     }
 }

 /**
  * Gather the info about an atom proto.
  */
 int collate_atom(const Descriptor *atom, AtomDecl *atomDecl,
                  vector<java_type_t> *signature) {

   int errorCount = 0;
   // Build a sorted list of the fields. Descriptor has them in source file
   // order.
   map<int, const FieldDescriptor *> fields;
   for (int j = 0; j < atom->field_count(); j++) {
     const FieldDescriptor *field = atom->field(j);
     fields[field->number()] = field;
   }

   // Check that the parameters start at 1 and go up sequentially.
   int expectedNumber = 1;
   for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
        it != fields.end(); it++) {
     const int number = it->first;
     const FieldDescriptor *field = it->second;
     if (number != expectedNumber) {
       print_error(field,
                   "Fields must be numbered consecutively starting at 1:"
                   " '%s' is %d but should be %d\n",
                   field->name().c_str(), number, expectedNumber);
       errorCount++;
       expectedNumber = number;
       continue;
     }
     expectedNumber++;
   }

   // Check that only allowed types are present. Remove any invalid ones.
   for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
        it != fields.end(); it++) {
     const FieldDescriptor *field = it->second;

     java_type_t javaType = java_type(field);

     if (javaType == JAVA_TYPE_UNKNOWN) {
       print_error(field, "Unkown type for field: %s\n", field->name().c_str());
       errorCount++;
       continue;
     } else if (javaType == JAVA_TYPE_OBJECT &&
                atomDecl->code < PULL_ATOM_START_ID) {
       // Allow attribution chain, but only at position 1.
       print_error(field,
                   "Message type not allowed for field in pushed atoms: %s\n",
                   field->name().c_str());
       errorCount++;
       continue;
     } else if (javaType == JAVA_TYPE_BYTE_ARRAY) {
       print_error(field, "Raw bytes type not allowed for field: %s\n",
                   field->name().c_str());
       errorCount++;
       continue;
     }
   }

   // Check that if there's an attribution chain, it's at position 1.
   for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
        it != fields.end(); it++) {
     int number = it->first;
     if (number != 1) {
       const FieldDescriptor *field = it->second;
       java_type_t javaType = java_type(field);
       if (javaType == JAVA_TYPE_ATTRIBUTION_CHAIN) {
         print_error(
             field,
             "AttributionChain fields must have field id 1, in message: '%s'\n",
             atom->name().c_str());
         errorCount++;
       }
     }
   }

   // Build the type signature and the atom data.
   for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
        it != fields.end(); it++) {
     const FieldDescriptor *field = it->second;
     java_type_t javaType = java_type(field);

     AtomField atField(field->name(), javaType);
     // Generate signature for pushed atoms
     if (atomDecl->code < PULL_ATOM_START_ID) {
       if (javaType == JAVA_TYPE_ENUM) {
         // All enums are treated as ints when it comes to function signatures.
         signature->push_back(JAVA_TYPE_INT);
         collate_enums(*field->enum_type(), &atField);
       } else {
         signature->push_back(javaType);
       }
     }
     if (javaType == JAVA_TYPE_ENUM) {
       // All enums are treated as ints when it comes to function signatures.
       collate_enums(*field->enum_type(), &atField);
     }
     atomDecl->fields.push_back(atField);

     if (field->options().GetExtension(os::statsd::stateFieldOption).option() ==
         os::statsd::StateField::PRIMARY) {
         if (javaType == JAVA_TYPE_UNKNOWN ||
             javaType == JAVA_TYPE_ATTRIBUTION_CHAIN ||
             javaType == JAVA_TYPE_OBJECT || javaType == JAVA_TYPE_BYTE_ARRAY) {
             errorCount++;
         }
         atomDecl->primaryFields.push_back(it->first);
     }

     if (field->options().GetExtension(os::statsd::stateFieldOption).option() ==
         os::statsd::StateField::EXCLUSIVE) {
         if (javaType == JAVA_TYPE_UNKNOWN ||
             javaType == JAVA_TYPE_ATTRIBUTION_CHAIN ||
             javaType == JAVA_TYPE_OBJECT || javaType == JAVA_TYPE_BYTE_ARRAY) {
             errorCount++;
         }

         if (atomDecl->exclusiveField == 0) {
             atomDecl->exclusiveField = it->first;
         } else {
             errorCount++;
         }
     }

     if (field->options().GetExtension(os::statsd::is_uid) == true) {
         if (javaType != JAVA_TYPE_INT) {
             errorCount++;
         }

         if (atomDecl->uidField == 0) {
             atomDecl->uidField = it->first;
         } else {
             errorCount++;
         }
     }
   }

   return errorCount;
 }

 // This function flattens the fields of the AttributionNode proto in an Atom proto and generates
 // the corresponding atom decl and signature.
 bool get_non_chained_node(const Descriptor *atom, AtomDecl *atomDecl,
                           vector<java_type_t> *signature) {
     // Build a sorted list of the fields. Descriptor has them in source file
     // order.
     map<int, const FieldDescriptor *> fields;
     for (int j = 0; j < atom->field_count(); j++) {
         const FieldDescriptor *field = atom->field(j);
         fields[field->number()] = field;
     }

     AtomDecl attributionDecl;
     vector<java_type_t> attributionSignature;
     collate_atom(android::os::statsd::AttributionNode::descriptor(),
                  &attributionDecl, &attributionSignature);

     // Build the type signature and the atom data.
     bool has_attribution_node = false;
     for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
         it != fields.end(); it++) {
         const FieldDescriptor *field = it->second;
         java_type_t javaType = java_type(field);
         if (javaType == JAVA_TYPE_ATTRIBUTION_CHAIN) {
             atomDecl->fields.insert(
                 atomDecl->fields.end(),
                 attributionDecl.fields.begin(), attributionDecl.fields.end());
             signature->insert(
                 signature->end(),
                 attributionSignature.begin(), attributionSignature.end());
             has_attribution_node = true;

         } else {
             AtomField atField(field->name(), javaType);
             if (javaType == JAVA_TYPE_ENUM) {
                 // All enums are treated as ints when it comes to function signatures.
                 signature->push_back(JAVA_TYPE_INT);
                 collate_enums(*field->enum_type(), &atField);
             } else {
                 signature->push_back(javaType);
             }
             atomDecl->fields.push_back(atField);
         }
     }
     return has_attribution_node;
 }

 /**
  * Gather the info about the atoms.
  */
 int collate_atoms(const Descriptor *descriptor, Atoms *atoms) {
   int errorCount = 0;
   const bool dbg = false;

   for (int i = 0; i < descriptor->field_count(); i++) {
     const FieldDescriptor *atomField = descriptor->field(i);

     if (dbg) {
       printf("   %s (%d)\n", atomField->name().c_str(), atomField->number());
     }

     // StatsEvent only has one oneof, which contains only messages. Don't allow
     // other types.
     if (atomField->type() != FieldDescriptor::TYPE_MESSAGE) {
       print_error(atomField,
                   "Bad type for atom. StatsEvent can only have message type "
                   "fields: %s\n",
                   atomField->name().c_str());
       errorCount++;
       continue;
     }

     const Descriptor *atom = atomField->message_type();
     AtomDecl atomDecl(atomField->number(), atomField->name(), atom->name());
     vector<java_type_t> signature;
     errorCount += collate_atom(atom, &atomDecl, &signature);
     if (atomDecl.primaryFields.size() != 0 && atomDecl.exclusiveField == 0) {
         errorCount++;
     }
     atoms->signatures.insert(signature);
     atoms->decls.insert(atomDecl);

     AtomDecl nonChainedAtomDecl(atomField->number(), atomField->name(), atom->name());
     vector<java_type_t> nonChainedSignature;
     if (get_non_chained_node(atom, &nonChainedAtomDecl, &nonChainedSignature)) {
         atoms->non_chained_signatures.insert(nonChainedSignature);
         atoms->non_chained_decls.insert(nonChainedAtomDecl);
     }
   }

   if (dbg) {
     printf("signatures = [\n");
     for (set<vector<java_type_t>>::const_iterator it =
              atoms->signatures.begin();
          it != atoms->signatures.end(); it++) {
       printf("   ");
       for (vector<java_type_t>::const_iterator jt = it->begin();
            jt != it->end(); jt++) {
         printf(" %d", (int)*jt);
       }
       printf("\n");
     }
     printf("]\n");
   }

   return errorCount;
 }

 }  // namespace stats_log_api_gen
 }  // namespace android
	/*
	* Copyright (C) 2017, The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "Collation.h"
	#include "frameworks/base/cmds/statsd/src/atoms.pb.h"

	#include <stdio.h>
	#include <map>

	namespace android {
	namespace stats_log_api_gen {

	using google::protobuf::EnumDescriptor;
	using google::protobuf::FieldDescriptor;
	using google::protobuf::FileDescriptor;
	using google::protobuf::SourceLocation;
	using std::map;


	//
	// AtomDecl class
	//

	AtomDecl::AtomDecl()
	:code(0),
	name()
	{
	}

	AtomDecl::AtomDecl(const AtomDecl& that)
	: code(that.code),
	name(that.name),
	message(that.message),
	fields(that.fields),
	primaryFields(that.primaryFields),
	exclusiveField(that.exclusiveField),
	uidField(that.uidField) {}

	AtomDecl::AtomDecl(int c, const string& n, const string& m)
	:code(c),
	name(n),
	message(m)
	{
	}

	AtomDecl::~AtomDecl()
	{
	}


	/**
	* Print an error message for a FieldDescriptor, including the file name and line number.
	*/
	static void
	print_error(const FieldDescriptor* field, const char* format, ...)
	{
	const Descriptor* message = field->containing_type();
	const FileDescriptor* file = message->file();

	SourceLocation loc;
	if (field->GetSourceLocation(&loc)) {
	// TODO: this will work if we can figure out how to pass --include_source_info to protoc
	fprintf(stderr, "%s:%d: ", file->name().c_str(), loc.start_line);
	} else {
	fprintf(stderr, "%s: ", file->name().c_str());
	}
	va_list args;
	va_start(args, format);
	vfprintf(stderr, format, args);
	va_end (args);
	}

	/**
	* Convert a protobuf type into a java type.
	*/
	static java_type_t
	java_type(const FieldDescriptor* field)
	{
	int protoType = field->type();
	switch (protoType) {
	case FieldDescriptor::TYPE_DOUBLE:
	return JAVA_TYPE_DOUBLE;
	case FieldDescriptor::TYPE_FLOAT:
	return JAVA_TYPE_FLOAT;
	case FieldDescriptor::TYPE_INT64:
	return JAVA_TYPE_LONG;
	case FieldDescriptor::TYPE_UINT64:
	return JAVA_TYPE_LONG;
	case FieldDescriptor::TYPE_INT32:
	return JAVA_TYPE_INT;
	case FieldDescriptor::TYPE_FIXED64:
	return JAVA_TYPE_LONG;
	case FieldDescriptor::TYPE_FIXED32:
	return JAVA_TYPE_INT;
	case FieldDescriptor::TYPE_BOOL:
	return JAVA_TYPE_BOOLEAN;
	case FieldDescriptor::TYPE_STRING:
	return JAVA_TYPE_STRING;
	case FieldDescriptor::TYPE_GROUP:
	return JAVA_TYPE_UNKNOWN;
	case FieldDescriptor::TYPE_MESSAGE:
	// TODO: not the final package name
	if (field->message_type()->full_name() ==
	"android.os.statsd.AttributionNode") {
	return JAVA_TYPE_ATTRIBUTION_CHAIN;
	} else if (field->message_type()->full_name() ==
	"android.os.statsd.KeyValuePair") {
	return JAVA_TYPE_KEY_VALUE_PAIR;
	} else {
	return JAVA_TYPE_OBJECT;
	}
	case FieldDescriptor::TYPE_BYTES:
	return JAVA_TYPE_BYTE_ARRAY;
	case FieldDescriptor::TYPE_UINT32:
	return JAVA_TYPE_INT;
	case FieldDescriptor::TYPE_ENUM:
	return JAVA_TYPE_ENUM;
	case FieldDescriptor::TYPE_SFIXED32:
	return JAVA_TYPE_INT;
	case FieldDescriptor::TYPE_SFIXED64:
	return JAVA_TYPE_LONG;
	case FieldDescriptor::TYPE_SINT32:
	return JAVA_TYPE_INT;
	case FieldDescriptor::TYPE_SINT64:
	return JAVA_TYPE_LONG;
	default:
	return JAVA_TYPE_UNKNOWN;
	}
	}

	/**
	* Gather the enums info.
	*/
	void collate_enums(const EnumDescriptor &enumDescriptor, AtomField *atomField) {
	for (int i = 0; i < enumDescriptor.value_count(); i++) {
	atomField->enumValues[enumDescriptor.value(i)->number()] =
	enumDescriptor.value(i)->name().c_str();
	}
	}

	/**
	* Gather the info about an atom proto.
	*/
	int collate_atom(const Descriptor atom, AtomDecl atomDecl,
	vector<java_type_t> *signature) {

	int errorCount = 0;
	// Build a sorted list of the fields. Descriptor has them in source file
	// order.
	map<int, const FieldDescriptor *> fields;
	for (int j = 0; j < atom->field_count(); j++) {
	const FieldDescriptor *field = atom->field(j);
	fields[field->number()] = field;
	}

	// Check that the parameters start at 1 and go up sequentially.
	int expectedNumber = 1;
	for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
	it != fields.end(); it++) {
	const int number = it->first;
	const FieldDescriptor *field = it->second;
	if (number != expectedNumber) {
	print_error(field,
	"Fields must be numbered consecutively starting at 1:"
	" '%s' is %d but should be %d\n",
	field->name().c_str(), number, expectedNumber);
	errorCount++;
	expectedNumber = number;
	continue;
	}
	expectedNumber++;
	}

	// Check that only allowed types are present. Remove any invalid ones.
	for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
	it != fields.end(); it++) {
	const FieldDescriptor *field = it->second;

	java_type_t javaType = java_type(field);

	if (javaType == JAVA_TYPE_UNKNOWN) {
	print_error(field, "Unkown type for field: %s\n", field->name().c_str());
	errorCount++;
	continue;
	} else if (javaType == JAVA_TYPE_OBJECT &&
	atomDecl->code < PULL_ATOM_START_ID) {
	// Allow attribution chain, but only at position 1.
	print_error(field,
	"Message type not allowed for field in pushed atoms: %s\n",
	field->name().c_str());
	errorCount++;
	continue;
	} else if (javaType == JAVA_TYPE_BYTE_ARRAY) {
	print_error(field, "Raw bytes type not allowed for field: %s\n",
	field->name().c_str());
	errorCount++;
	continue;
	}
	}

	// Check that if there's an attribution chain, it's at position 1.
	for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
	it != fields.end(); it++) {
	int number = it->first;
	if (number != 1) {
	const FieldDescriptor *field = it->second;
	java_type_t javaType = java_type(field);
	if (javaType == JAVA_TYPE_ATTRIBUTION_CHAIN) {
	print_error(
	field,
	"AttributionChain fields must have field id 1, in message: '%s'\n",
	atom->name().c_str());
	errorCount++;
	}
	}
	}

	// Build the type signature and the atom data.
	for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
	it != fields.end(); it++) {
	const FieldDescriptor *field = it->second;
	java_type_t javaType = java_type(field);

	AtomField atField(field->name(), javaType);
	// Generate signature for pushed atoms
	if (atomDecl->code < PULL_ATOM_START_ID) {
	if (javaType == JAVA_TYPE_ENUM) {
	// All enums are treated as ints when it comes to function signatures.
	signature->push_back(JAVA_TYPE_INT);
	collate_enums(*field->enum_type(), &atField);
	} else {
	signature->push_back(javaType);
	}
	}
	if (javaType == JAVA_TYPE_ENUM) {
	// All enums are treated as ints when it comes to function signatures.
	collate_enums(*field->enum_type(), &atField);
	}
	atomDecl->fields.push_back(atField);

	if (field->options().GetExtension(os::statsd::stateFieldOption).option() ==
	os::statsd::StateField::PRIMARY) {
	if (javaType == JAVA_TYPE_UNKNOWN \|\|
	javaType == JAVA_TYPE_ATTRIBUTION_CHAIN \|\|
	javaType == JAVA_TYPE_OBJECT \|\| javaType == JAVA_TYPE_BYTE_ARRAY) {
	errorCount++;
	}
	atomDecl->primaryFields.push_back(it->first);
	}

	if (field->options().GetExtension(os::statsd::stateFieldOption).option() ==
	os::statsd::StateField::EXCLUSIVE) {
	if (javaType == JAVA_TYPE_UNKNOWN \|\|
	javaType == JAVA_TYPE_ATTRIBUTION_CHAIN \|\|
	javaType == JAVA_TYPE_OBJECT \|\| javaType == JAVA_TYPE_BYTE_ARRAY) {
	errorCount++;
	}

	if (atomDecl->exclusiveField == 0) {
	atomDecl->exclusiveField = it->first;
	} else {
	errorCount++;
	}
	}

	if (field->options().GetExtension(os::statsd::is_uid) == true) {
	if (javaType != JAVA_TYPE_INT) {
	errorCount++;
	}

	if (atomDecl->uidField == 0) {
	atomDecl->uidField = it->first;
	} else {
	errorCount++;
	}
	}
	}

	return errorCount;
	}

	// This function flattens the fields of the AttributionNode proto in an Atom proto and generates
	// the corresponding atom decl and signature.
	bool get_non_chained_node(const Descriptor atom, AtomDecl atomDecl,
	vector<java_type_t> *signature) {
	// Build a sorted list of the fields. Descriptor has them in source file
	// order.
	map<int, const FieldDescriptor *> fields;
	for (int j = 0; j < atom->field_count(); j++) {
	const FieldDescriptor *field = atom->field(j);
	fields[field->number()] = field;
	}

	AtomDecl attributionDecl;
	vector<java_type_t> attributionSignature;
	collate_atom(android::os::statsd::AttributionNode::descriptor(),
	&attributionDecl, &attributionSignature);

	// Build the type signature and the atom data.
	bool has_attribution_node = false;
	for (map<int, const FieldDescriptor *>::const_iterator it = fields.begin();
	it != fields.end(); it++) {
	const FieldDescriptor *field = it->second;
	java_type_t javaType = java_type(field);
	if (javaType == JAVA_TYPE_ATTRIBUTION_CHAIN) {
	atomDecl->fields.insert(
	atomDecl->fields.end(),
	attributionDecl.fields.begin(), attributionDecl.fields.end());
	signature->insert(
	signature->end(),
	attributionSignature.begin(), attributionSignature.end());
	has_attribution_node = true;

	} else {
	AtomField atField(field->name(), javaType);
	if (javaType == JAVA_TYPE_ENUM) {
	// All enums are treated as ints when it comes to function signatures.
	signature->push_back(JAVA_TYPE_INT);
	collate_enums(*field->enum_type(), &atField);
	} else {
	signature->push_back(javaType);
	}
	atomDecl->fields.push_back(atField);
	}
	}
	return has_attribution_node;
	}

	/**
	* Gather the info about the atoms.
	*/
	int collate_atoms(const Descriptor descriptor, Atoms atoms) {
	int errorCount = 0;
	const bool dbg = false;

	for (int i = 0; i < descriptor->field_count(); i++) {
	const FieldDescriptor *atomField = descriptor->field(i);

	if (dbg) {
	printf(" %s (%d)\n", atomField->name().c_str(), atomField->number());
	}

	// StatsEvent only has one oneof, which contains only messages. Don't allow
	// other types.
	if (atomField->type() != FieldDescriptor::TYPE_MESSAGE) {
	print_error(atomField,
	"Bad type for atom. StatsEvent can only have message type "
	"fields: %s\n",
	atomField->name().c_str());
	errorCount++;
	continue;
	}

	const Descriptor *atom = atomField->message_type();
	AtomDecl atomDecl(atomField->number(), atomField->name(), atom->name());
	vector<java_type_t> signature;
	errorCount += collate_atom(atom, &atomDecl, &signature);
	if (atomDecl.primaryFields.size() != 0 && atomDecl.exclusiveField == 0) {
	errorCount++;
	}
	atoms->signatures.insert(signature);
	atoms->decls.insert(atomDecl);

	AtomDecl nonChainedAtomDecl(atomField->number(), atomField->name(), atom->name());
	vector<java_type_t> nonChainedSignature;
	if (get_non_chained_node(atom, &nonChainedAtomDecl, &nonChainedSignature)) {
	atoms->non_chained_signatures.insert(nonChainedSignature);
	atoms->non_chained_decls.insert(nonChainedAtomDecl);
	}
	}

	if (dbg) {
	printf("signatures = [\n");
	for (set<vector<java_type_t>>::const_iterator it =
	atoms->signatures.begin();
	it != atoms->signatures.end(); it++) {
	printf(" ");
	for (vector<java_type_t>::const_iterator jt = it->begin();
	jt != it->end(); jt++) {
	printf(" %d", (int)*jt);
	}
	printf("\n");
	}
	printf("]\n");
	}

	return errorCount;
	}

	} // namespace stats_log_api_gen
	} // namespace android