core/jni/android_database_CursorWindow.cpp - platform/frameworks/base - Git at Google

 /*
  * Copyright (C) 2007 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.
  */

 #undef LOG_TAG
 #define LOG_TAG "CursorWindow"

 #include <jni.h>
 #include <JNIHelp.h>
 #include <android_runtime/AndroidRuntime.h>

 #include <utils/Log.h>
 #include <utils/String8.h>
 #include <utils/String16.h>
 #include <utils/Unicode.h>

 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>

 #include <androidfw/CursorWindow.h>
 #include "android_os_Parcel.h"
 #include "android_util_Binder.h"
 #include "android_database_SQLiteCommon.h"

 namespace android {

 static struct {
     jfieldID data;
     jfieldID sizeCopied;
 } gCharArrayBufferClassInfo;

 static jstring gEmptyString;

 static void throwExceptionWithRowCol(JNIEnv* env, jint row, jint column) {
     String8 msg;
     msg.appendFormat("Couldn't read row %d, col %d from CursorWindow.  "
             "Make sure the Cursor is initialized correctly before accessing data from it.",
             row, column);
     jniThrowException(env, "java/lang/IllegalStateException", msg.string());
 }

 static void throwUnknownTypeException(JNIEnv * env, jint type) {
     String8 msg;
     msg.appendFormat("UNKNOWN type %d", type);
     jniThrowException(env, "java/lang/IllegalStateException", msg.string());
 }

 static jint nativeCreate(JNIEnv* env, jclass clazz, jstring nameObj, jint cursorWindowSize) {
     String8 name;
     const char* nameStr = env->GetStringUTFChars(nameObj, NULL);
     name.setTo(nameStr);
     env->ReleaseStringUTFChars(nameObj, nameStr);

     CursorWindow* window;
     status_t status = CursorWindow::create(name, cursorWindowSize, &window);
     if (status || !window) {
         ALOGE("Could not allocate CursorWindow '%s' of size %d due to error %d.",
                 name.string(), cursorWindowSize, status);
         return 0;
     }

     LOG_WINDOW("nativeInitializeEmpty: window = %p", window);
     return reinterpret_cast<jint>(window);
 }

 static jint nativeCreateFromParcel(JNIEnv* env, jclass clazz, jobject parcelObj) {
     Parcel* parcel = parcelForJavaObject(env, parcelObj);

     CursorWindow* window;
     status_t status = CursorWindow::createFromParcel(parcel, &window);
     if (status || !window) {
         ALOGE("Could not create CursorWindow from Parcel due to error %d.", status);
         return 0;
     }

     LOG_WINDOW("nativeInitializeFromBinder: numRows = %d, numColumns = %d, window = %p",
             window->getNumRows(), window->getNumColumns(), window);
     return reinterpret_cast<jint>(window);
 }

 static void nativeDispose(JNIEnv* env, jclass clazz, jint windowPtr) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     if (window) {
         LOG_WINDOW("Closing window %p", window);
         delete window;
     }
 }

 static jstring nativeGetName(JNIEnv* env, jclass clazz, jint windowPtr) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     return env->NewStringUTF(window->name().string());
 }

 static void nativeWriteToParcel(JNIEnv * env, jclass clazz, jint windowPtr,
         jobject parcelObj) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     Parcel* parcel = parcelForJavaObject(env, parcelObj);

     status_t status = window->writeToParcel(parcel);
     if (status) {
         String8 msg;
         msg.appendFormat("Could not write CursorWindow to Parcel due to error %d.", status);
         jniThrowRuntimeException(env, msg.string());
     }
 }

 static void nativeClear(JNIEnv * env, jclass clazz, jint windowPtr) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("Clearing window %p", window);
     status_t status = window->clear();
     if (status) {
         LOG_WINDOW("Could not clear window. error=%d", status);
     }
 }

 static jint nativeGetNumRows(JNIEnv* env, jclass clazz, jint windowPtr) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     return window->getNumRows();
 }

 static jboolean nativeSetNumColumns(JNIEnv* env, jclass clazz, jint windowPtr,
         jint columnNum) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     status_t status = window->setNumColumns(columnNum);
     return status == OK;
 }

 static jboolean nativeAllocRow(JNIEnv* env, jclass clazz, jint windowPtr) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     status_t status = window->allocRow();
     return status == OK;
 }

 static void nativeFreeLastRow(JNIEnv* env, jclass clazz, jint windowPtr) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     window->freeLastRow();
 }

 static jint nativeGetType(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("returning column type affinity for %d,%d from %p", row, column, window);

     CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
     if (!fieldSlot) {
         // FIXME: This is really broken but we have CTS tests that depend
         // on this legacy behavior.
         //throwExceptionWithRowCol(env, row, column);
         return CursorWindow::FIELD_TYPE_NULL;
     }
     return window->getFieldSlotType(fieldSlot);
 }

 static jbyteArray nativeGetBlob(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("Getting blob for %d,%d from %p", row, column, window);

     CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
     if (!fieldSlot) {
         throwExceptionWithRowCol(env, row, column);
         return NULL;
     }

     int32_t type = window->getFieldSlotType(fieldSlot);
     if (type == CursorWindow::FIELD_TYPE_BLOB || type == CursorWindow::FIELD_TYPE_STRING) {
         size_t size;
         const void* value = window->getFieldSlotValueBlob(fieldSlot, &size);
         jbyteArray byteArray = env->NewByteArray(size);
         if (!byteArray) {
             env->ExceptionClear();
             throw_sqlite3_exception(env, "Native could not create new byte[]");
             return NULL;
         }
         env->SetByteArrayRegion(byteArray, 0, size, static_cast<const jbyte*>(value));
         return byteArray;
     } else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
         throw_sqlite3_exception(env, "INTEGER data in nativeGetBlob ");
     } else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
         throw_sqlite3_exception(env, "FLOAT data in nativeGetBlob ");
     } else if (type == CursorWindow::FIELD_TYPE_NULL) {
         // do nothing
     } else {
         throwUnknownTypeException(env, type);
     }
     return NULL;
 }

 static jstring nativeGetString(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("Getting string for %d,%d from %p", row, column, window);

     CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
     if (!fieldSlot) {
         throwExceptionWithRowCol(env, row, column);
         return NULL;
     }

     int32_t type = window->getFieldSlotType(fieldSlot);
     if (type == CursorWindow::FIELD_TYPE_STRING) {
         size_t sizeIncludingNull;
         const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
         if (sizeIncludingNull <= 1) {
             return gEmptyString;
         }
         // Convert to UTF-16 here instead of calling NewStringUTF.  NewStringUTF
         // doesn't like UTF-8 strings with high codepoints.  It actually expects
         // Modified UTF-8 with encoded surrogate pairs.
         String16 utf16(value, sizeIncludingNull - 1);
         return env->NewString(reinterpret_cast<const jchar*>(utf16.string()), utf16.size());
     } else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
         int64_t value = window->getFieldSlotValueLong(fieldSlot);
         char buf[32];
         snprintf(buf, sizeof(buf), "%lld", value);
         return env->NewStringUTF(buf);
     } else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
         double value = window->getFieldSlotValueDouble(fieldSlot);
         char buf[32];
         snprintf(buf, sizeof(buf), "%g", value);
         return env->NewStringUTF(buf);
     } else if (type == CursorWindow::FIELD_TYPE_NULL) {
         return NULL;
     } else if (type == CursorWindow::FIELD_TYPE_BLOB) {
         throw_sqlite3_exception(env, "Unable to convert BLOB to string");
         return NULL;
     } else {
         throwUnknownTypeException(env, type);
         return NULL;
     }
 }

 static jcharArray allocCharArrayBuffer(JNIEnv* env, jobject bufferObj, size_t size) {
     jcharArray dataObj = jcharArray(env->GetObjectField(bufferObj,
             gCharArrayBufferClassInfo.data));
     if (dataObj && size) {
         jsize capacity = env->GetArrayLength(dataObj);
         if (size_t(capacity) < size) {
             env->DeleteLocalRef(dataObj);
             dataObj = NULL;
         }
     }
     if (!dataObj) {
         jsize capacity = size;
         if (capacity < 64) {
             capacity = 64;
         }
         dataObj = env->NewCharArray(capacity); // might throw OOM
         if (dataObj) {
             env->SetObjectField(bufferObj, gCharArrayBufferClassInfo.data, dataObj);
         }
     }
     return dataObj;
 }

 static void fillCharArrayBufferUTF(JNIEnv* env, jobject bufferObj,
         const char* str, size_t len) {
     ssize_t size = utf8_to_utf16_length(reinterpret_cast<const uint8_t*>(str), len);
     if (size < 0) {
         size = 0; // invalid UTF8 string
     }
     jcharArray dataObj = allocCharArrayBuffer(env, bufferObj, size);
     if (dataObj) {
         if (size) {
             jchar* data = static_cast<jchar*>(env->GetPrimitiveArrayCritical(dataObj, NULL));
             utf8_to_utf16_no_null_terminator(reinterpret_cast<const uint8_t*>(str), len,
                     reinterpret_cast<char16_t*>(data));
             env->ReleasePrimitiveArrayCritical(dataObj, data, 0);
         }
         env->SetIntField(bufferObj, gCharArrayBufferClassInfo.sizeCopied, size);
     }
 }

 static void clearCharArrayBuffer(JNIEnv* env, jobject bufferObj) {
     jcharArray dataObj = allocCharArrayBuffer(env, bufferObj, 0);
     if (dataObj) {
         env->SetIntField(bufferObj, gCharArrayBufferClassInfo.sizeCopied, 0);
     }
 }

 static void nativeCopyStringToBuffer(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column, jobject bufferObj) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("Copying string for %d,%d from %p", row, column, window);

     CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
     if (!fieldSlot) {
         throwExceptionWithRowCol(env, row, column);
         return;
     }

     int32_t type = window->getFieldSlotType(fieldSlot);
     if (type == CursorWindow::FIELD_TYPE_STRING) {
         size_t sizeIncludingNull;
         const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
         if (sizeIncludingNull > 1) {
             fillCharArrayBufferUTF(env, bufferObj, value, sizeIncludingNull - 1);
         } else {
             clearCharArrayBuffer(env, bufferObj);
         }
     } else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
         int64_t value = window->getFieldSlotValueLong(fieldSlot);
         char buf[32];
         snprintf(buf, sizeof(buf), "%lld", value);
         fillCharArrayBufferUTF(env, bufferObj, buf, strlen(buf));
     } else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
         double value = window->getFieldSlotValueDouble(fieldSlot);
         char buf[32];
         snprintf(buf, sizeof(buf), "%g", value);
         fillCharArrayBufferUTF(env, bufferObj, buf, strlen(buf));
     } else if (type == CursorWindow::FIELD_TYPE_NULL) {
         clearCharArrayBuffer(env, bufferObj);
     } else if (type == CursorWindow::FIELD_TYPE_BLOB) {
         throw_sqlite3_exception(env, "Unable to convert BLOB to string");
     } else {
         throwUnknownTypeException(env, type);
     }
 }

 static jlong nativeGetLong(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("Getting long for %d,%d from %p", row, column, window);

     CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
     if (!fieldSlot) {
         throwExceptionWithRowCol(env, row, column);
         return 0;
     }

     int32_t type = window->getFieldSlotType(fieldSlot);
     if (type == CursorWindow::FIELD_TYPE_INTEGER) {
         return window->getFieldSlotValueLong(fieldSlot);
     } else if (type == CursorWindow::FIELD_TYPE_STRING) {
         size_t sizeIncludingNull;
         const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
         return sizeIncludingNull > 1 ? strtoll(value, NULL, 0) : 0L;
     } else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
         return jlong(window->getFieldSlotValueDouble(fieldSlot));
     } else if (type == CursorWindow::FIELD_TYPE_NULL) {
         return 0;
     } else if (type == CursorWindow::FIELD_TYPE_BLOB) {
         throw_sqlite3_exception(env, "Unable to convert BLOB to long");
         return 0;
     } else {
         throwUnknownTypeException(env, type);
         return 0;
     }
 }

 static jdouble nativeGetDouble(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     LOG_WINDOW("Getting double for %d,%d from %p", row, column, window);

     CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
     if (!fieldSlot) {
         throwExceptionWithRowCol(env, row, column);
         return 0.0;
     }

     int32_t type = window->getFieldSlotType(fieldSlot);
     if (type == CursorWindow::FIELD_TYPE_FLOAT) {
         return window->getFieldSlotValueDouble(fieldSlot);
     } else if (type == CursorWindow::FIELD_TYPE_STRING) {
         size_t sizeIncludingNull;
         const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
         return sizeIncludingNull > 1 ? strtod(value, NULL) : 0.0;
     } else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
         return jdouble(window->getFieldSlotValueLong(fieldSlot));
     } else if (type == CursorWindow::FIELD_TYPE_NULL) {
         return 0.0;
     } else if (type == CursorWindow::FIELD_TYPE_BLOB) {
         throw_sqlite3_exception(env, "Unable to convert BLOB to double");
         return 0.0;
     } else {
         throwUnknownTypeException(env, type);
         return 0.0;
     }
 }

 static jboolean nativePutBlob(JNIEnv* env, jclass clazz, jint windowPtr,
         jbyteArray valueObj, jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     jsize len = env->GetArrayLength(valueObj);

     void* value = env->GetPrimitiveArrayCritical(valueObj, NULL);
     status_t status = window->putBlob(row, column, value, len);
     env->ReleasePrimitiveArrayCritical(valueObj, value, JNI_ABORT);

     if (status) {
         LOG_WINDOW("Failed to put blob. error=%d", status);
         return false;
     }

     LOG_WINDOW("%d,%d is BLOB with %u bytes", row, column, len);
     return true;
 }

 static jboolean nativePutString(JNIEnv* env, jclass clazz, jint windowPtr,
         jstring valueObj, jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);

     size_t sizeIncludingNull = env->GetStringUTFLength(valueObj) + 1;
     const char* valueStr = env->GetStringUTFChars(valueObj, NULL);
     if (!valueStr) {
         LOG_WINDOW("value can't be transferred to UTFChars");
         return false;
     }
     status_t status = window->putString(row, column, valueStr, sizeIncludingNull);
     env->ReleaseStringUTFChars(valueObj, valueStr);

     if (status) {
         LOG_WINDOW("Failed to put string. error=%d", status);
         return false;
     }

     LOG_WINDOW("%d,%d is TEXT with %u bytes", row, column, sizeIncludingNull);
     return true;
 }

 static jboolean nativePutLong(JNIEnv* env, jclass clazz, jint windowPtr,
         jlong value, jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     status_t status = window->putLong(row, column, value);

     if (status) {
         LOG_WINDOW("Failed to put long. error=%d", status);
         return false;
     }

     LOG_WINDOW("%d,%d is INTEGER 0x%016llx", row, column, value);
     return true;
 }

 static jboolean nativePutDouble(JNIEnv* env, jclass clazz, jint windowPtr,
         jdouble value, jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     status_t status = window->putDouble(row, column, value);

     if (status) {
         LOG_WINDOW("Failed to put double. error=%d", status);
         return false;
     }

     LOG_WINDOW("%d,%d is FLOAT %lf", row, column, value);
     return true;
 }

 static jboolean nativePutNull(JNIEnv* env, jclass clazz, jint windowPtr,
         jint row, jint column) {
     CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
     status_t status = window->putNull(row, column);

     if (status) {
         LOG_WINDOW("Failed to put null. error=%d", status);
         return false;
     }

     LOG_WINDOW("%d,%d is NULL", row, column);
     return true;
 }

 static JNINativeMethod sMethods[] =
 {
     /* name, signature, funcPtr */
     { "nativeCreate", "(Ljava/lang/String;I)I",
             (void*)nativeCreate },
     { "nativeCreateFromParcel", "(Landroid/os/Parcel;)I",
             (void*)nativeCreateFromParcel },
     { "nativeDispose", "(I)V",
             (void*)nativeDispose },
     { "nativeWriteToParcel", "(ILandroid/os/Parcel;)V",
             (void*)nativeWriteToParcel },
     { "nativeGetName", "(I)Ljava/lang/String;",
             (void*)nativeGetName },
     { "nativeClear", "(I)V",
             (void*)nativeClear },
     { "nativeGetNumRows", "(I)I",
             (void*)nativeGetNumRows },
     { "nativeSetNumColumns", "(II)Z",
             (void*)nativeSetNumColumns },
     { "nativeAllocRow", "(I)Z",
             (void*)nativeAllocRow },
     { "nativeFreeLastRow", "(I)V",
             (void*)nativeFreeLastRow },
     { "nativeGetType", "(III)I",
             (void*)nativeGetType },
     { "nativeGetBlob", "(III)[B",
             (void*)nativeGetBlob },
     { "nativeGetString", "(III)Ljava/lang/String;",
             (void*)nativeGetString },
     { "nativeGetLong", "(III)J",
             (void*)nativeGetLong },
     { "nativeGetDouble", "(III)D",
             (void*)nativeGetDouble },
     { "nativeCopyStringToBuffer", "(IIILandroid/database/CharArrayBuffer;)V",
             (void*)nativeCopyStringToBuffer },
     { "nativePutBlob", "(I[BII)Z",
             (void*)nativePutBlob },
     { "nativePutString", "(ILjava/lang/String;II)Z",
             (void*)nativePutString },
     { "nativePutLong", "(IJII)Z",
             (void*)nativePutLong },
     { "nativePutDouble", "(IDII)Z",
             (void*)nativePutDouble },
     { "nativePutNull", "(III)Z",
             (void*)nativePutNull },
 };

 #define FIND_CLASS(var, className) \
         var = env->FindClass(className); \
         LOG_FATAL_IF(! var, "Unable to find class " className);

 #define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
         var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
         LOG_FATAL_IF(! var, "Unable to find field " fieldName);

 int register_android_database_CursorWindow(JNIEnv * env)
 {
     jclass clazz;
     FIND_CLASS(clazz, "android/database/CharArrayBuffer");

     GET_FIELD_ID(gCharArrayBufferClassInfo.data, clazz,
             "data", "[C");
     GET_FIELD_ID(gCharArrayBufferClassInfo.sizeCopied, clazz,
             "sizeCopied", "I");

     gEmptyString = jstring(env->NewGlobalRef(env->NewStringUTF("")));
     LOG_FATAL_IF(!gEmptyString, "Unable to create empty string");

     return AndroidRuntime::registerNativeMethods(env, "android/database/CursorWindow",
             sMethods, NELEM(sMethods));
 }

 } // namespace android
	/*
	* Copyright (C) 2007 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.
	*/

	#undef LOG_TAG
	#define LOG_TAG "CursorWindow"

	#include <jni.h>
	#include <JNIHelp.h>
	#include <android_runtime/AndroidRuntime.h>

	#include <utils/Log.h>
	#include <utils/String8.h>
	#include <utils/String16.h>
	#include <utils/Unicode.h>

	#include <stdio.h>
	#include <string.h>
	#include <unistd.h>

	#include <androidfw/CursorWindow.h>
	#include "android_os_Parcel.h"
	#include "android_util_Binder.h"
	#include "android_database_SQLiteCommon.h"

	namespace android {

	static struct {
	jfieldID data;
	jfieldID sizeCopied;
	} gCharArrayBufferClassInfo;

	static jstring gEmptyString;

	static void throwExceptionWithRowCol(JNIEnv* env, jint row, jint column) {
	String8 msg;
	msg.appendFormat("Couldn't read row %d, col %d from CursorWindow. "
	"Make sure the Cursor is initialized correctly before accessing data from it.",
	row, column);
	jniThrowException(env, "java/lang/IllegalStateException", msg.string());
	}

	static void throwUnknownTypeException(JNIEnv * env, jint type) {
	String8 msg;
	msg.appendFormat("UNKNOWN type %d", type);
	jniThrowException(env, "java/lang/IllegalStateException", msg.string());
	}

	static jint nativeCreate(JNIEnv* env, jclass clazz, jstring nameObj, jint cursorWindowSize) {
	String8 name;
	const char* nameStr = env->GetStringUTFChars(nameObj, NULL);
	name.setTo(nameStr);
	env->ReleaseStringUTFChars(nameObj, nameStr);

	CursorWindow* window;
	status_t status = CursorWindow::create(name, cursorWindowSize, &window);
	if (status \|\| !window) {
	ALOGE("Could not allocate CursorWindow '%s' of size %d due to error %d.",
	name.string(), cursorWindowSize, status);
	return 0;
	}

	LOG_WINDOW("nativeInitializeEmpty: window = %p", window);
	return reinterpret_cast<jint>(window);
	}

	static jint nativeCreateFromParcel(JNIEnv* env, jclass clazz, jobject parcelObj) {
	Parcel* parcel = parcelForJavaObject(env, parcelObj);

	CursorWindow* window;
	status_t status = CursorWindow::createFromParcel(parcel, &window);
	if (status \|\| !window) {
	ALOGE("Could not create CursorWindow from Parcel due to error %d.", status);
	return 0;
	}

	LOG_WINDOW("nativeInitializeFromBinder: numRows = %d, numColumns = %d, window = %p",
	window->getNumRows(), window->getNumColumns(), window);
	return reinterpret_cast<jint>(window);
	}

	static void nativeDispose(JNIEnv* env, jclass clazz, jint windowPtr) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	if (window) {
	LOG_WINDOW("Closing window %p", window);
	delete window;
	}
	}

	static jstring nativeGetName(JNIEnv* env, jclass clazz, jint windowPtr) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	return env->NewStringUTF(window->name().string());
	}

	static void nativeWriteToParcel(JNIEnv * env, jclass clazz, jint windowPtr,
	jobject parcelObj) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	Parcel* parcel = parcelForJavaObject(env, parcelObj);

	status_t status = window->writeToParcel(parcel);
	if (status) {
	String8 msg;
	msg.appendFormat("Could not write CursorWindow to Parcel due to error %d.", status);
	jniThrowRuntimeException(env, msg.string());
	}
	}

	static void nativeClear(JNIEnv * env, jclass clazz, jint windowPtr) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("Clearing window %p", window);
	status_t status = window->clear();
	if (status) {
	LOG_WINDOW("Could not clear window. error=%d", status);
	}
	}

	static jint nativeGetNumRows(JNIEnv* env, jclass clazz, jint windowPtr) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	return window->getNumRows();
	}

	static jboolean nativeSetNumColumns(JNIEnv* env, jclass clazz, jint windowPtr,
	jint columnNum) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	status_t status = window->setNumColumns(columnNum);
	return status == OK;
	}

	static jboolean nativeAllocRow(JNIEnv* env, jclass clazz, jint windowPtr) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	status_t status = window->allocRow();
	return status == OK;
	}

	static void nativeFreeLastRow(JNIEnv* env, jclass clazz, jint windowPtr) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	window->freeLastRow();
	}

	static jint nativeGetType(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("returning column type affinity for %d,%d from %p", row, column, window);

	CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
	if (!fieldSlot) {
	// FIXME: This is really broken but we have CTS tests that depend
	// on this legacy behavior.
	//throwExceptionWithRowCol(env, row, column);
	return CursorWindow::FIELD_TYPE_NULL;
	}
	return window->getFieldSlotType(fieldSlot);
	}

	static jbyteArray nativeGetBlob(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("Getting blob for %d,%d from %p", row, column, window);

	CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
	if (!fieldSlot) {
	throwExceptionWithRowCol(env, row, column);
	return NULL;
	}

	int32_t type = window->getFieldSlotType(fieldSlot);
	if (type == CursorWindow::FIELD_TYPE_BLOB \|\| type == CursorWindow::FIELD_TYPE_STRING) {
	size_t size;
	const void* value = window->getFieldSlotValueBlob(fieldSlot, &size);
	jbyteArray byteArray = env->NewByteArray(size);
	if (!byteArray) {
	env->ExceptionClear();
	throw_sqlite3_exception(env, "Native could not create new byte[]");
	return NULL;
	}
	env->SetByteArrayRegion(byteArray, 0, size, static_cast<const jbyte*>(value));
	return byteArray;
	} else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
	throw_sqlite3_exception(env, "INTEGER data in nativeGetBlob ");
	} else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
	throw_sqlite3_exception(env, "FLOAT data in nativeGetBlob ");
	} else if (type == CursorWindow::FIELD_TYPE_NULL) {
	// do nothing
	} else {
	throwUnknownTypeException(env, type);
	}
	return NULL;
	}

	static jstring nativeGetString(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("Getting string for %d,%d from %p", row, column, window);

	CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
	if (!fieldSlot) {
	throwExceptionWithRowCol(env, row, column);
	return NULL;
	}

	int32_t type = window->getFieldSlotType(fieldSlot);
	if (type == CursorWindow::FIELD_TYPE_STRING) {
	size_t sizeIncludingNull;
	const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
	if (sizeIncludingNull <= 1) {
	return gEmptyString;
	}
	// Convert to UTF-16 here instead of calling NewStringUTF. NewStringUTF
	// doesn't like UTF-8 strings with high codepoints. It actually expects
	// Modified UTF-8 with encoded surrogate pairs.
	String16 utf16(value, sizeIncludingNull - 1);
	return env->NewString(reinterpret_cast<const jchar*>(utf16.string()), utf16.size());
	} else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
	int64_t value = window->getFieldSlotValueLong(fieldSlot);
	char buf[32];
	snprintf(buf, sizeof(buf), "%lld", value);
	return env->NewStringUTF(buf);
	} else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
	double value = window->getFieldSlotValueDouble(fieldSlot);
	char buf[32];
	snprintf(buf, sizeof(buf), "%g", value);
	return env->NewStringUTF(buf);
	} else if (type == CursorWindow::FIELD_TYPE_NULL) {
	return NULL;
	} else if (type == CursorWindow::FIELD_TYPE_BLOB) {
	throw_sqlite3_exception(env, "Unable to convert BLOB to string");
	return NULL;
	} else {
	throwUnknownTypeException(env, type);
	return NULL;
	}
	}

	static jcharArray allocCharArrayBuffer(JNIEnv* env, jobject bufferObj, size_t size) {
	jcharArray dataObj = jcharArray(env->GetObjectField(bufferObj,
	gCharArrayBufferClassInfo.data));
	if (dataObj && size) {
	jsize capacity = env->GetArrayLength(dataObj);
	if (size_t(capacity) < size) {
	env->DeleteLocalRef(dataObj);
	dataObj = NULL;
	}
	}
	if (!dataObj) {
	jsize capacity = size;
	if (capacity < 64) {
	capacity = 64;
	}
	dataObj = env->NewCharArray(capacity); // might throw OOM
	if (dataObj) {
	env->SetObjectField(bufferObj, gCharArrayBufferClassInfo.data, dataObj);
	}
	}
	return dataObj;
	}

	static void fillCharArrayBufferUTF(JNIEnv* env, jobject bufferObj,
	const char* str, size_t len) {
	ssize_t size = utf8_to_utf16_length(reinterpret_cast<const uint8_t*>(str), len);
	if (size < 0) {
	size = 0; // invalid UTF8 string
	}
	jcharArray dataObj = allocCharArrayBuffer(env, bufferObj, size);
	if (dataObj) {
	if (size) {
	jchar* data = static_cast<jchar*>(env->GetPrimitiveArrayCritical(dataObj, NULL));
	utf8_to_utf16_no_null_terminator(reinterpret_cast<const uint8_t*>(str), len,
	reinterpret_cast<char16_t*>(data));
	env->ReleasePrimitiveArrayCritical(dataObj, data, 0);
	}
	env->SetIntField(bufferObj, gCharArrayBufferClassInfo.sizeCopied, size);
	}
	}

	static void clearCharArrayBuffer(JNIEnv* env, jobject bufferObj) {
	jcharArray dataObj = allocCharArrayBuffer(env, bufferObj, 0);
	if (dataObj) {
	env->SetIntField(bufferObj, gCharArrayBufferClassInfo.sizeCopied, 0);
	}
	}

	static void nativeCopyStringToBuffer(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column, jobject bufferObj) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("Copying string for %d,%d from %p", row, column, window);

	CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
	if (!fieldSlot) {
	throwExceptionWithRowCol(env, row, column);
	return;
	}

	int32_t type = window->getFieldSlotType(fieldSlot);
	if (type == CursorWindow::FIELD_TYPE_STRING) {
	size_t sizeIncludingNull;
	const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
	if (sizeIncludingNull > 1) {
	fillCharArrayBufferUTF(env, bufferObj, value, sizeIncludingNull - 1);
	} else {
	clearCharArrayBuffer(env, bufferObj);
	}
	} else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
	int64_t value = window->getFieldSlotValueLong(fieldSlot);
	char buf[32];
	snprintf(buf, sizeof(buf), "%lld", value);
	fillCharArrayBufferUTF(env, bufferObj, buf, strlen(buf));
	} else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
	double value = window->getFieldSlotValueDouble(fieldSlot);
	char buf[32];
	snprintf(buf, sizeof(buf), "%g", value);
	fillCharArrayBufferUTF(env, bufferObj, buf, strlen(buf));
	} else if (type == CursorWindow::FIELD_TYPE_NULL) {
	clearCharArrayBuffer(env, bufferObj);
	} else if (type == CursorWindow::FIELD_TYPE_BLOB) {
	throw_sqlite3_exception(env, "Unable to convert BLOB to string");
	} else {
	throwUnknownTypeException(env, type);
	}
	}

	static jlong nativeGetLong(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("Getting long for %d,%d from %p", row, column, window);

	CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
	if (!fieldSlot) {
	throwExceptionWithRowCol(env, row, column);
	return 0;
	}

	int32_t type = window->getFieldSlotType(fieldSlot);
	if (type == CursorWindow::FIELD_TYPE_INTEGER) {
	return window->getFieldSlotValueLong(fieldSlot);
	} else if (type == CursorWindow::FIELD_TYPE_STRING) {
	size_t sizeIncludingNull;
	const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
	return sizeIncludingNull > 1 ? strtoll(value, NULL, 0) : 0L;
	} else if (type == CursorWindow::FIELD_TYPE_FLOAT) {
	return jlong(window->getFieldSlotValueDouble(fieldSlot));
	} else if (type == CursorWindow::FIELD_TYPE_NULL) {
	return 0;
	} else if (type == CursorWindow::FIELD_TYPE_BLOB) {
	throw_sqlite3_exception(env, "Unable to convert BLOB to long");
	return 0;
	} else {
	throwUnknownTypeException(env, type);
	return 0;
	}
	}

	static jdouble nativeGetDouble(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	LOG_WINDOW("Getting double for %d,%d from %p", row, column, window);

	CursorWindow::FieldSlot* fieldSlot = window->getFieldSlot(row, column);
	if (!fieldSlot) {
	throwExceptionWithRowCol(env, row, column);
	return 0.0;
	}

	int32_t type = window->getFieldSlotType(fieldSlot);
	if (type == CursorWindow::FIELD_TYPE_FLOAT) {
	return window->getFieldSlotValueDouble(fieldSlot);
	} else if (type == CursorWindow::FIELD_TYPE_STRING) {
	size_t sizeIncludingNull;
	const char* value = window->getFieldSlotValueString(fieldSlot, &sizeIncludingNull);
	return sizeIncludingNull > 1 ? strtod(value, NULL) : 0.0;
	} else if (type == CursorWindow::FIELD_TYPE_INTEGER) {
	return jdouble(window->getFieldSlotValueLong(fieldSlot));
	} else if (type == CursorWindow::FIELD_TYPE_NULL) {
	return 0.0;
	} else if (type == CursorWindow::FIELD_TYPE_BLOB) {
	throw_sqlite3_exception(env, "Unable to convert BLOB to double");
	return 0.0;
	} else {
	throwUnknownTypeException(env, type);
	return 0.0;
	}
	}

	static jboolean nativePutBlob(JNIEnv* env, jclass clazz, jint windowPtr,
	jbyteArray valueObj, jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	jsize len = env->GetArrayLength(valueObj);

	void* value = env->GetPrimitiveArrayCritical(valueObj, NULL);
	status_t status = window->putBlob(row, column, value, len);
	env->ReleasePrimitiveArrayCritical(valueObj, value, JNI_ABORT);

	if (status) {
	LOG_WINDOW("Failed to put blob. error=%d", status);
	return false;
	}

	LOG_WINDOW("%d,%d is BLOB with %u bytes", row, column, len);
	return true;
	}

	static jboolean nativePutString(JNIEnv* env, jclass clazz, jint windowPtr,
	jstring valueObj, jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);

	size_t sizeIncludingNull = env->GetStringUTFLength(valueObj) + 1;
	const char* valueStr = env->GetStringUTFChars(valueObj, NULL);
	if (!valueStr) {
	LOG_WINDOW("value can't be transferred to UTFChars");
	return false;
	}
	status_t status = window->putString(row, column, valueStr, sizeIncludingNull);
	env->ReleaseStringUTFChars(valueObj, valueStr);

	if (status) {
	LOG_WINDOW("Failed to put string. error=%d", status);
	return false;
	}

	LOG_WINDOW("%d,%d is TEXT with %u bytes", row, column, sizeIncludingNull);
	return true;
	}

	static jboolean nativePutLong(JNIEnv* env, jclass clazz, jint windowPtr,
	jlong value, jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	status_t status = window->putLong(row, column, value);

	if (status) {
	LOG_WINDOW("Failed to put long. error=%d", status);
	return false;
	}

	LOG_WINDOW("%d,%d is INTEGER 0x%016llx", row, column, value);
	return true;
	}

	static jboolean nativePutDouble(JNIEnv* env, jclass clazz, jint windowPtr,
	jdouble value, jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	status_t status = window->putDouble(row, column, value);

	if (status) {
	LOG_WINDOW("Failed to put double. error=%d", status);
	return false;
	}

	LOG_WINDOW("%d,%d is FLOAT %lf", row, column, value);
	return true;
	}

	static jboolean nativePutNull(JNIEnv* env, jclass clazz, jint windowPtr,
	jint row, jint column) {
	CursorWindow* window = reinterpret_cast<CursorWindow*>(windowPtr);
	status_t status = window->putNull(row, column);

	if (status) {
	LOG_WINDOW("Failed to put null. error=%d", status);
	return false;
	}

	LOG_WINDOW("%d,%d is NULL", row, column);
	return true;
	}

	static JNINativeMethod sMethods[] =
	{
	/* name, signature, funcPtr */
	{ "nativeCreate", "(Ljava/lang/String;I)I",
	(void*)nativeCreate },
	{ "nativeCreateFromParcel", "(Landroid/os/Parcel;)I",
	(void*)nativeCreateFromParcel },
	{ "nativeDispose", "(I)V",
	(void*)nativeDispose },
	{ "nativeWriteToParcel", "(ILandroid/os/Parcel;)V",
	(void*)nativeWriteToParcel },
	{ "nativeGetName", "(I)Ljava/lang/String;",
	(void*)nativeGetName },
	{ "nativeClear", "(I)V",
	(void*)nativeClear },
	{ "nativeGetNumRows", "(I)I",
	(void*)nativeGetNumRows },
	{ "nativeSetNumColumns", "(II)Z",
	(void*)nativeSetNumColumns },
	{ "nativeAllocRow", "(I)Z",
	(void*)nativeAllocRow },
	{ "nativeFreeLastRow", "(I)V",
	(void*)nativeFreeLastRow },
	{ "nativeGetType", "(III)I",
	(void*)nativeGetType },
	{ "nativeGetBlob", "(III)[B",
	(void*)nativeGetBlob },
	{ "nativeGetString", "(III)Ljava/lang/String;",
	(void*)nativeGetString },
	{ "nativeGetLong", "(III)J",
	(void*)nativeGetLong },
	{ "nativeGetDouble", "(III)D",
	(void*)nativeGetDouble },
	{ "nativeCopyStringToBuffer", "(IIILandroid/database/CharArrayBuffer;)V",
	(void*)nativeCopyStringToBuffer },
	{ "nativePutBlob", "(I[BII)Z",
	(void*)nativePutBlob },
	{ "nativePutString", "(ILjava/lang/String;II)Z",
	(void*)nativePutString },
	{ "nativePutLong", "(IJII)Z",
	(void*)nativePutLong },
	{ "nativePutDouble", "(IDII)Z",
	(void*)nativePutDouble },
	{ "nativePutNull", "(III)Z",
	(void*)nativePutNull },
	};

	#define FIND_CLASS(var, className) \
	var = env->FindClass(className); \
	LOG_FATAL_IF(! var, "Unable to find class " className);

	#define GET_FIELD_ID(var, clazz, fieldName, fieldDescriptor) \
	var = env->GetFieldID(clazz, fieldName, fieldDescriptor); \
	LOG_FATAL_IF(! var, "Unable to find field " fieldName);

	int register_android_database_CursorWindow(JNIEnv * env)
	{
	jclass clazz;
	FIND_CLASS(clazz, "android/database/CharArrayBuffer");

	GET_FIELD_ID(gCharArrayBufferClassInfo.data, clazz,
	"data", "[C");
	GET_FIELD_ID(gCharArrayBufferClassInfo.sizeCopied, clazz,
	"sizeCopied", "I");

	gEmptyString = jstring(env->NewGlobalRef(env->NewStringUTF("")));
	LOG_FATAL_IF(!gEmptyString, "Unable to create empty string");

	return AndroidRuntime::registerNativeMethods(env, "android/database/CursorWindow",
	sMethods, NELEM(sMethods));
	}

	} // namespace android