tools/stats_log_api_gen/java_writer.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2019, 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 "java_writer.h"
 #include "java_writer_q.h"
 #include "utils.h"

 namespace android {
 namespace stats_log_api_gen {

 static int write_java_q_logger_class(
         FILE* out,
         const map<vector<java_type_t>, FieldNumberToAnnotations>& signatureInfoMap,
         const AtomDecl &attributionDecl) {
     fprintf(out, "\n");
     fprintf(out, "    // Write logging helper methods for statsd in Q and earlier.\n");
     fprintf(out, "    private static class QLogger {\n");

     write_java_q_logging_constants(out, "        ");

     // Print Q write methods.
     fprintf(out, "\n");
     fprintf(out, "        // Write methods.\n");
     write_java_methods_q_schema(
             out, signatureInfoMap, attributionDecl, "        ");

     fprintf(out, "    }\n");
     return 0;
 }

 static void write_annotations(
         FILE* out, int argIndex,
         const FieldNumberToAnnotations& fieldNumberToAnnotations) {
     auto it = fieldNumberToAnnotations.find(argIndex);
     if (it == fieldNumberToAnnotations.end()) {
         return;
     }
     const set<shared_ptr<Annotation>>& annotations = it->second;
     for (auto& annotation: annotations) {
         // TODO(b/151744250): Group annotations for same atoms.
         // TODO(b/151786433): Write atom constant name instead of atom id literal.
         fprintf(out, "        if (code == %d) {\n", annotation->atomId);
         switch(annotation->type) {
             case ANNOTATION_TYPE_INT:
                 // TODO(b/151776731): Check for reset state annotation and only include reset state
                 // when field value == default state annotation value.
                 // TODO(b/151786433): Write annotation constant name instead of
                 // annotation id literal.
                 fprintf(out, "            builder.addIntAnnotation((byte) %d, %d);\n",
                         annotation->annotationId, annotation->value.intValue);
                 break;
             case ANNOTATION_TYPE_BOOL:
                 // TODO(b/151786433): Write annotation constant name instead of
                 // annotation id literal.
                 fprintf(out, "            builder.addBooleanAnnotation((byte) %d, %s);\n",
                         annotation->annotationId,
                         annotation->value.boolValue ? "true" : "false");
                 break;
             default:
                 break;
         }
         fprintf(out, "        }\n");
     }
 }

 static int write_java_methods(
         FILE* out,
         const map<vector<java_type_t>, FieldNumberToAnnotations>& signatureInfoMap,
         const AtomDecl &attributionDecl,
         const bool supportQ
         ) {
     for (auto signatureInfoMapIt = signatureInfoMap.begin();
             signatureInfoMapIt != signatureInfoMap.end(); signatureInfoMapIt++) {
         // Print method signature.
         fprintf(out, "    public static void write(int code");
         const vector<java_type_t>& signature = signatureInfoMapIt->first;
         const FieldNumberToAnnotations& fieldNumberToAnnotations = signatureInfoMapIt->second;
         int argIndex = 1;
         for (vector<java_type_t>::const_iterator arg = signature.begin();
                 arg != signature.end(); arg++) {
             if (*arg == JAVA_TYPE_ATTRIBUTION_CHAIN) {
                 for (auto chainField : attributionDecl.fields) {
                     fprintf(out, ", %s[] %s",
                         java_type_name(chainField.javaType), chainField.name.c_str());
                 }
             } else if (*arg == JAVA_TYPE_KEY_VALUE_PAIR) {
                 fprintf(out, ", android.util.SparseArray<Object> valueMap");
             } else {
                 fprintf(out, ", %s arg%d", java_type_name(*arg), argIndex);
             }
             argIndex++;
         }
         fprintf(out, ") {\n");

         // Print method body.
         string indent("");
         if (supportQ) {
             // TODO(b/146235828): Use just SDK_INT check once it is incremented from Q.
             fprintf(out, "        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.Q\n");
             fprintf(out, "                || (Build.VERSION.SDK_INT == Build.VERSION_CODES.Q\n");
             fprintf(out, "                    && Build.VERSION.PREVIEW_SDK_INT > 0)) {\n");
             indent = "    ";
         }

         // Start StatsEvent.Builder.
         fprintf(out, "%s        final StatsEvent.Builder builder = StatsEvent.newBuilder();\n",
                 indent.c_str());

         // Write atom code.
         fprintf(out, "%s        builder.setAtomId(code);\n", indent.c_str());

         // Write the args.
         argIndex = 1;
         for (vector<java_type_t>::const_iterator arg = signature.begin();
                 arg != signature.end(); arg++) {
             switch (*arg) {
             case JAVA_TYPE_BOOLEAN:
                 fprintf(out, "%s        builder.writeBoolean(arg%d);\n", indent.c_str(), argIndex);
                 break;
             case JAVA_TYPE_INT:
             case JAVA_TYPE_ENUM:
                 fprintf(out, "%s        builder.writeInt(arg%d);\n", indent.c_str(), argIndex);
                 break;
             case JAVA_TYPE_FLOAT:
                 fprintf(out, "%s        builder.writeFloat(arg%d);\n", indent.c_str(), argIndex);
                 break;
             case JAVA_TYPE_LONG:
                 fprintf(out, "%s        builder.writeLong(arg%d);\n", indent.c_str(), argIndex);
                 break;
             case JAVA_TYPE_STRING:
                 fprintf(out, "%s        builder.writeString(arg%d);\n", indent.c_str(), argIndex);
                 break;
             case JAVA_TYPE_BYTE_ARRAY:
                 fprintf(out, "%s        builder.writeByteArray(null == arg%d ? new byte[0] : arg%d);\n",
                         indent.c_str(), argIndex, argIndex);
                 break;
             case JAVA_TYPE_ATTRIBUTION_CHAIN:
             {
                 const char* uidName = attributionDecl.fields.front().name.c_str();
                 const char* tagName = attributionDecl.fields.back().name.c_str();

                 fprintf(out, "%s        builder.writeAttributionChain(\n", indent.c_str());
                 fprintf(out, "%s                null == %s ? new int[0] : %s,\n",
                         indent.c_str(), uidName, uidName);
                 fprintf(out, "%s                null == %s ? new String[0] : %s);\n",
                         indent.c_str(), tagName, tagName);
                 break;
             }
             case JAVA_TYPE_KEY_VALUE_PAIR:
                 fprintf(out, "\n");
                 fprintf(out,
                         "%s        // Write KeyValuePairs.\n", indent.c_str());
                 fprintf(out,
                         "%s        final int count = valueMap.size();\n", indent.c_str());
                 fprintf(out,
                         "%s        android.util.SparseIntArray intMap = null;\n",
                         indent.c_str());
                 fprintf(out,
                         "%s        android.util.SparseLongArray longMap = null;\n",
                         indent.c_str());
                 fprintf(out,
                         "%s        android.util.SparseArray<String> stringMap = null;\n",
                         indent.c_str());
                 fprintf(out,
                         "%s        android.util.SparseArray<Float> floatMap = null;\n",
                         indent.c_str());
                 fprintf(out,
                         "%s        for (int i = 0; i < count; i++) {\n", indent.c_str());
                 fprintf(out,
                         "%s            final int key = valueMap.keyAt(i);\n", indent.c_str());
                 fprintf(out,
                         "%s            final Object value = valueMap.valueAt(i);\n",
                         indent.c_str());
                 fprintf(out,
                         "%s            if (value instanceof Integer) {\n", indent.c_str());
                 fprintf(out,
                         "%s                if (null == intMap) {\n", indent.c_str());
                 fprintf(out,
                         "%s                    intMap = new android.util.SparseIntArray();\n", indent.c_str());
                 fprintf(out,
                         "%s                }\n", indent.c_str());
                 fprintf(out,
                         "%s                intMap.put(key, (Integer) value);\n", indent.c_str());
                 fprintf(out,
                         "%s            } else if (value instanceof Long) {\n", indent.c_str());
                 fprintf(out,
                         "%s                if (null == longMap) {\n", indent.c_str());
                 fprintf(out,
                         "%s                    longMap = new android.util.SparseLongArray();\n", indent.c_str());
                 fprintf(out,
                         "%s                }\n", indent.c_str());
                 fprintf(out,
                         "%s                longMap.put(key, (Long) value);\n", indent.c_str());
                 fprintf(out,
                         "%s            } else if (value instanceof String) {\n", indent.c_str());
                 fprintf(out,
                         "%s                if (null == stringMap) {\n", indent.c_str());
                 fprintf(out,
                         "%s                    stringMap = new android.util.SparseArray<>();\n", indent.c_str());
                 fprintf(out,
                         "%s                }\n", indent.c_str());
                 fprintf(out,
                         "%s                stringMap.put(key, (String) value);\n", indent.c_str());
                 fprintf(out,
                         "%s            } else if (value instanceof Float) {\n", indent.c_str());
                 fprintf(out,
                         "%s                if (null == floatMap) {\n", indent.c_str());
                 fprintf(out,
                         "%s                    floatMap = new android.util.SparseArray<>();\n", indent.c_str());
                 fprintf(out,
                         "%s                }\n", indent.c_str());
                 fprintf(out,
                         "%s                floatMap.put(key, (Float) value);\n", indent.c_str());
                 fprintf(out,
                         "%s            }\n", indent.c_str());
                 fprintf(out,
                         "%s        }\n", indent.c_str());
                 fprintf(out,
                         "%s        builder.writeKeyValuePairs("
                         "intMap, longMap, stringMap, floatMap);\n", indent.c_str());
                 break;
             default:
                 // Unsupported types: OBJECT, DOUBLE.
                 fprintf(stderr, "Encountered unsupported type.");
                 return 1;
             }
             write_annotations(out, argIndex, fieldNumberToAnnotations);
             argIndex++;
         }

         fprintf(out, "\n");
         fprintf(out, "%s        builder.usePooledBuffer();\n", indent.c_str());
         fprintf(out, "%s        StatsLog.write(builder.build());\n", indent.c_str());

         // Add support for writing using Q schema if this is not the default module.
         if (supportQ) {
             fprintf(out, "        } else {\n");
             fprintf(out, "            QLogger.write(code");
             argIndex = 1;
             for (vector<java_type_t>::const_iterator arg = signature.begin();
                 arg != signature.end(); arg++) {
                 if (*arg == JAVA_TYPE_ATTRIBUTION_CHAIN) {
                     const char* uidName = attributionDecl.fields.front().name.c_str();
                     const char* tagName = attributionDecl.fields.back().name.c_str();
                     fprintf(out, ", %s, %s", uidName, tagName);
                 } else if (*arg == JAVA_TYPE_KEY_VALUE_PAIR) {
                     // Module logging does not yet support key value pair.
                     fprintf(stderr, "Module logging does not yet support key value pair.\n");
                     return 1;
                 } else {
                     fprintf(out, ", arg%d", argIndex);
                 }
                 argIndex++;
             }
             fprintf(out, ");\n");
             fprintf(out, "        }\n"); // if
         }

         fprintf(out, "    }\n"); // method
         fprintf(out, "\n");
     }
     return 0;

 }

 int write_stats_log_java(FILE* out, const Atoms& atoms, const AtomDecl &attributionDecl,
                                     const string& javaClass,
                                     const string& javaPackage, const bool supportQ,
                                     const bool supportWorkSource) {
     // Print prelude
     fprintf(out, "// This file is autogenerated\n");
     fprintf(out, "\n");
     fprintf(out, "package %s;\n", javaPackage.c_str());
     fprintf(out, "\n");
     fprintf(out, "\n");
     if (supportQ) {
         fprintf(out, "import android.os.Build;\n");
         fprintf(out, "import android.os.SystemClock;\n");
     }

     fprintf(out, "import android.util.StatsEvent;\n");
     fprintf(out, "import android.util.StatsLog;\n");

     fprintf(out, "\n");
     fprintf(out, "\n");
     fprintf(out, "/**\n");
     fprintf(out, " * Utility class for logging statistics events.\n");
     fprintf(out, " */\n");
     fprintf(out, "public class %s {\n", javaClass.c_str());

     write_java_atom_codes(out, atoms);
     write_java_enum_values(out, atoms);

     int errors = 0;

     // Print write methods.
     fprintf(out, "    // Write methods\n");
     errors += write_java_methods(
             out, atoms.signatureInfoMap, attributionDecl, supportQ);
     errors += write_java_non_chained_methods(
             out, atoms.nonChainedSignatureInfoMap);
     if (supportWorkSource) {
         errors += write_java_work_source_methods(out, atoms.signatureInfoMap);
     }

     if (supportQ) {
         errors += write_java_q_logger_class(
                 out, atoms.signatureInfoMap, attributionDecl);
     }

     fprintf(out, "}\n");

     return errors;
 }

 }  // namespace stats_log_api_gen
 }  // namespace android
	/*
	* Copyright (C) 2019, 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 "java_writer.h"
	#include "java_writer_q.h"
	#include "utils.h"

	namespace android {
	namespace stats_log_api_gen {

	static int write_java_q_logger_class(
	FILE* out,
	const map<vector<java_type_t>, FieldNumberToAnnotations>& signatureInfoMap,
	const AtomDecl &attributionDecl) {
	fprintf(out, "\n");
	fprintf(out, " // Write logging helper methods for statsd in Q and earlier.\n");
	fprintf(out, " private static class QLogger {\n");

	write_java_q_logging_constants(out, " ");

	// Print Q write methods.
	fprintf(out, "\n");
	fprintf(out, " // Write methods.\n");
	write_java_methods_q_schema(
	out, signatureInfoMap, attributionDecl, " ");

	fprintf(out, " }\n");
	return 0;
	}

	static void write_annotations(
	FILE* out, int argIndex,
	const FieldNumberToAnnotations& fieldNumberToAnnotations) {
	auto it = fieldNumberToAnnotations.find(argIndex);
	if (it == fieldNumberToAnnotations.end()) {
	return;
	}
	const set<shared_ptr<Annotation>>& annotations = it->second;
	for (auto& annotation: annotations) {
	// TODO(b/151744250): Group annotations for same atoms.
	// TODO(b/151786433): Write atom constant name instead of atom id literal.
	fprintf(out, " if (code == %d) {\n", annotation->atomId);
	switch(annotation->type) {
	case ANNOTATION_TYPE_INT:
	// TODO(b/151776731): Check for reset state annotation and only include reset state
	// when field value == default state annotation value.
	// TODO(b/151786433): Write annotation constant name instead of
	// annotation id literal.
	fprintf(out, " builder.addIntAnnotation((byte) %d, %d);\n",
	annotation->annotationId, annotation->value.intValue);
	break;
	case ANNOTATION_TYPE_BOOL:
	// TODO(b/151786433): Write annotation constant name instead of
	// annotation id literal.
	fprintf(out, " builder.addBooleanAnnotation((byte) %d, %s);\n",
	annotation->annotationId,
	annotation->value.boolValue ? "true" : "false");
	break;
	default:
	break;
	}
	fprintf(out, " }\n");
	}
	}

	static int write_java_methods(
	FILE* out,
	const map<vector<java_type_t>, FieldNumberToAnnotations>& signatureInfoMap,
	const AtomDecl &attributionDecl,
	const bool supportQ
	) {
	for (auto signatureInfoMapIt = signatureInfoMap.begin();
	signatureInfoMapIt != signatureInfoMap.end(); signatureInfoMapIt++) {
	// Print method signature.
	fprintf(out, " public static void write(int code");
	const vector<java_type_t>& signature = signatureInfoMapIt->first;
	const FieldNumberToAnnotations& fieldNumberToAnnotations = signatureInfoMapIt->second;
	int argIndex = 1;
	for (vector<java_type_t>::const_iterator arg = signature.begin();
	arg != signature.end(); arg++) {
	if (*arg == JAVA_TYPE_ATTRIBUTION_CHAIN) {
	for (auto chainField : attributionDecl.fields) {
	fprintf(out, ", %s[] %s",
	java_type_name(chainField.javaType), chainField.name.c_str());
	}
	} else if (*arg == JAVA_TYPE_KEY_VALUE_PAIR) {
	fprintf(out, ", android.util.SparseArray<Object> valueMap");
	} else {
	fprintf(out, ", %s arg%d", java_type_name(*arg), argIndex);
	}
	argIndex++;
	}
	fprintf(out, ") {\n");

	// Print method body.
	string indent("");
	if (supportQ) {
	// TODO(b/146235828): Use just SDK_INT check once it is incremented from Q.
	fprintf(out, " if (Build.VERSION.SDK_INT > Build.VERSION_CODES.Q\n");
	fprintf(out, " \|\| (Build.VERSION.SDK_INT == Build.VERSION_CODES.Q\n");
	fprintf(out, " && Build.VERSION.PREVIEW_SDK_INT > 0)) {\n");
	indent = " ";
	}

	// Start StatsEvent.Builder.
	fprintf(out, "%s final StatsEvent.Builder builder = StatsEvent.newBuilder();\n",
	indent.c_str());

	// Write atom code.
	fprintf(out, "%s builder.setAtomId(code);\n", indent.c_str());

	// Write the args.
	argIndex = 1;
	for (vector<java_type_t>::const_iterator arg = signature.begin();
	arg != signature.end(); arg++) {
	switch (*arg) {
	case JAVA_TYPE_BOOLEAN:
	fprintf(out, "%s builder.writeBoolean(arg%d);\n", indent.c_str(), argIndex);
	break;
	case JAVA_TYPE_INT:
	case JAVA_TYPE_ENUM:
	fprintf(out, "%s builder.writeInt(arg%d);\n", indent.c_str(), argIndex);
	break;
	case JAVA_TYPE_FLOAT:
	fprintf(out, "%s builder.writeFloat(arg%d);\n", indent.c_str(), argIndex);
	break;
	case JAVA_TYPE_LONG:
	fprintf(out, "%s builder.writeLong(arg%d);\n", indent.c_str(), argIndex);
	break;
	case JAVA_TYPE_STRING:
	fprintf(out, "%s builder.writeString(arg%d);\n", indent.c_str(), argIndex);
	break;
	case JAVA_TYPE_BYTE_ARRAY:
	fprintf(out, "%s builder.writeByteArray(null == arg%d ? new byte[0] : arg%d);\n",
	indent.c_str(), argIndex, argIndex);
	break;
	case JAVA_TYPE_ATTRIBUTION_CHAIN:
	{
	const char* uidName = attributionDecl.fields.front().name.c_str();
	const char* tagName = attributionDecl.fields.back().name.c_str();

	fprintf(out, "%s builder.writeAttributionChain(\n", indent.c_str());
	fprintf(out, "%s null == %s ? new int[0] : %s,\n",
	indent.c_str(), uidName, uidName);
	fprintf(out, "%s null == %s ? new String[0] : %s);\n",
	indent.c_str(), tagName, tagName);
	break;
	}
	case JAVA_TYPE_KEY_VALUE_PAIR:
	fprintf(out, "\n");
	fprintf(out,
	"%s // Write KeyValuePairs.\n", indent.c_str());
	fprintf(out,
	"%s final int count = valueMap.size();\n", indent.c_str());
	fprintf(out,
	"%s android.util.SparseIntArray intMap = null;\n",
	indent.c_str());
	fprintf(out,
	"%s android.util.SparseLongArray longMap = null;\n",
	indent.c_str());
	fprintf(out,
	"%s android.util.SparseArray<String> stringMap = null;\n",
	indent.c_str());
	fprintf(out,
	"%s android.util.SparseArray<Float> floatMap = null;\n",
	indent.c_str());
	fprintf(out,
	"%s for (int i = 0; i < count; i++) {\n", indent.c_str());
	fprintf(out,
	"%s final int key = valueMap.keyAt(i);\n", indent.c_str());
	fprintf(out,
	"%s final Object value = valueMap.valueAt(i);\n",
	indent.c_str());
	fprintf(out,
	"%s if (value instanceof Integer) {\n", indent.c_str());
	fprintf(out,
	"%s if (null == intMap) {\n", indent.c_str());
	fprintf(out,
	"%s intMap = new android.util.SparseIntArray();\n", indent.c_str());
	fprintf(out,
	"%s }\n", indent.c_str());
	fprintf(out,
	"%s intMap.put(key, (Integer) value);\n", indent.c_str());
	fprintf(out,
	"%s } else if (value instanceof Long) {\n", indent.c_str());
	fprintf(out,
	"%s if (null == longMap) {\n", indent.c_str());
	fprintf(out,
	"%s longMap = new android.util.SparseLongArray();\n", indent.c_str());
	fprintf(out,
	"%s }\n", indent.c_str());
	fprintf(out,
	"%s longMap.put(key, (Long) value);\n", indent.c_str());
	fprintf(out,
	"%s } else if (value instanceof String) {\n", indent.c_str());
	fprintf(out,
	"%s if (null == stringMap) {\n", indent.c_str());
	fprintf(out,
	"%s stringMap = new android.util.SparseArray<>();\n", indent.c_str());
	fprintf(out,
	"%s }\n", indent.c_str());
	fprintf(out,
	"%s stringMap.put(key, (String) value);\n", indent.c_str());
	fprintf(out,
	"%s } else if (value instanceof Float) {\n", indent.c_str());
	fprintf(out,
	"%s if (null == floatMap) {\n", indent.c_str());
	fprintf(out,
	"%s floatMap = new android.util.SparseArray<>();\n", indent.c_str());
	fprintf(out,
	"%s }\n", indent.c_str());
	fprintf(out,
	"%s floatMap.put(key, (Float) value);\n", indent.c_str());
	fprintf(out,
	"%s }\n", indent.c_str());
	fprintf(out,
	"%s }\n", indent.c_str());
	fprintf(out,
	"%s builder.writeKeyValuePairs("
	"intMap, longMap, stringMap, floatMap);\n", indent.c_str());
	break;
	default:
	// Unsupported types: OBJECT, DOUBLE.
	fprintf(stderr, "Encountered unsupported type.");
	return 1;
	}
	write_annotations(out, argIndex, fieldNumberToAnnotations);
	argIndex++;
	}

	fprintf(out, "\n");
	fprintf(out, "%s builder.usePooledBuffer();\n", indent.c_str());
	fprintf(out, "%s StatsLog.write(builder.build());\n", indent.c_str());

	// Add support for writing using Q schema if this is not the default module.
	if (supportQ) {
	fprintf(out, " } else {\n");
	fprintf(out, " QLogger.write(code");
	argIndex = 1;
	for (vector<java_type_t>::const_iterator arg = signature.begin();
	arg != signature.end(); arg++) {
	if (*arg == JAVA_TYPE_ATTRIBUTION_CHAIN) {
	const char* uidName = attributionDecl.fields.front().name.c_str();
	const char* tagName = attributionDecl.fields.back().name.c_str();
	fprintf(out, ", %s, %s", uidName, tagName);
	} else if (*arg == JAVA_TYPE_KEY_VALUE_PAIR) {
	// Module logging does not yet support key value pair.
	fprintf(stderr, "Module logging does not yet support key value pair.\n");
	return 1;
	} else {
	fprintf(out, ", arg%d", argIndex);
	}
	argIndex++;
	}
	fprintf(out, ");\n");
	fprintf(out, " }\n"); // if
	}

	fprintf(out, " }\n"); // method
	fprintf(out, "\n");
	}
	return 0;

	}

	int write_stats_log_java(FILE* out, const Atoms& atoms, const AtomDecl &attributionDecl,
	const string& javaClass,
	const string& javaPackage, const bool supportQ,
	const bool supportWorkSource) {
	// Print prelude
	fprintf(out, "// This file is autogenerated\n");
	fprintf(out, "\n");
	fprintf(out, "package %s;\n", javaPackage.c_str());
	fprintf(out, "\n");
	fprintf(out, "\n");
	if (supportQ) {
	fprintf(out, "import android.os.Build;\n");
	fprintf(out, "import android.os.SystemClock;\n");
	}

	fprintf(out, "import android.util.StatsEvent;\n");
	fprintf(out, "import android.util.StatsLog;\n");

	fprintf(out, "\n");
	fprintf(out, "\n");
	fprintf(out, "/**\n");
	fprintf(out, " * Utility class for logging statistics events.\n");
	fprintf(out, " */\n");
	fprintf(out, "public class %s {\n", javaClass.c_str());

	write_java_atom_codes(out, atoms);
	write_java_enum_values(out, atoms);

	int errors = 0;

	// Print write methods.
	fprintf(out, " // Write methods\n");
	errors += write_java_methods(
	out, atoms.signatureInfoMap, attributionDecl, supportQ);
	errors += write_java_non_chained_methods(
	out, atoms.nonChainedSignatureInfoMap);
	if (supportWorkSource) {
	errors += write_java_work_source_methods(out, atoms.signatureInfoMap);
	}

	if (supportQ) {
	errors += write_java_q_logger_class(
	out, atoms.signatureInfoMap, attributionDecl);
	}

	fprintf(out, "}\n");

	return errors;
	}

	} // namespace stats_log_api_gen
	} // namespace android