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Diffstat (limited to 'javanano/src/main/java/com/google/protobuf/nano/InternalNano.java')
| -rw-r--r-- | javanano/src/main/java/com/google/protobuf/nano/InternalNano.java | 547 |
1 files changed, 0 insertions, 547 deletions
diff --git a/javanano/src/main/java/com/google/protobuf/nano/InternalNano.java b/javanano/src/main/java/com/google/protobuf/nano/InternalNano.java deleted file mode 100644 index 278368a0..00000000 --- a/javanano/src/main/java/com/google/protobuf/nano/InternalNano.java +++ /dev/null @@ -1,547 +0,0 @@ -// Protocol Buffers - Google's data interchange format -// Copyright 2008 Google Inc. All rights reserved. -// https://developers.google.com/protocol-buffers/ -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following disclaimer -// in the documentation and/or other materials provided with the -// distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived from -// this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -package com.google.protobuf.nano; - -import com.google.protobuf.nano.MapFactories.MapFactory; - -import java.io.IOException; -import java.nio.charset.Charset; -import java.util.Arrays; -import java.util.Map; -import java.util.Map.Entry; - -/** - * The classes contained within are used internally by the Protocol Buffer - * library and generated message implementations. They are public only because - * those generated messages do not reside in the {@code protobuf} package. - * Others should not use this class directly. - * - * @author kenton@google.com (Kenton Varda) - */ -public final class InternalNano { - - public static final int TYPE_DOUBLE = 1; - public static final int TYPE_FLOAT = 2; - public static final int TYPE_INT64 = 3; - public static final int TYPE_UINT64 = 4; - public static final int TYPE_INT32 = 5; - public static final int TYPE_FIXED64 = 6; - public static final int TYPE_FIXED32 = 7; - public static final int TYPE_BOOL = 8; - public static final int TYPE_STRING = 9; - public static final int TYPE_GROUP = 10; - public static final int TYPE_MESSAGE = 11; - public static final int TYPE_BYTES = 12; - public static final int TYPE_UINT32 = 13; - public static final int TYPE_ENUM = 14; - public static final int TYPE_SFIXED32 = 15; - public static final int TYPE_SFIXED64 = 16; - public static final int TYPE_SINT32 = 17; - public static final int TYPE_SINT64 = 18; - - static final Charset UTF_8 = Charset.forName("UTF-8"); - static final Charset ISO_8859_1 = Charset.forName("ISO-8859-1"); - - private InternalNano() {} - - /** - * An object to provide synchronization when lazily initializing static fields - * of {@link MessageNano} subclasses. - * <p> - * To enable earlier versions of ProGuard to inline short methods from a - * generated MessageNano subclass to the call sites, that class must not have - * a class initializer, which will be created if there is any static variable - * initializers. To lazily initialize the static variables in a thread-safe - * manner, the initialization code will synchronize on this object. - */ - public static final Object LAZY_INIT_LOCK = new Object(); - - /** - * Helper called by generated code to construct default values for string - * fields. - * <p> - * The protocol compiler does not actually contain a UTF-8 decoder -- it - * just pushes UTF-8-encoded text around without touching it. The one place - * where this presents a problem is when generating Java string literals. - * Unicode characters in the string literal would normally need to be encoded - * using a Unicode escape sequence, which would require decoding them. - * To get around this, protoc instead embeds the UTF-8 bytes into the - * generated code and leaves it to the runtime library to decode them. - * <p> - * It gets worse, though. If protoc just generated a byte array, like: - * new byte[] {0x12, 0x34, 0x56, 0x78} - * Java actually generates *code* which allocates an array and then fills - * in each value. This is much less efficient than just embedding the bytes - * directly into the bytecode. To get around this, we need another - * work-around. String literals are embedded directly, so protoc actually - * generates a string literal corresponding to the bytes. The easiest way - * to do this is to use the ISO-8859-1 character set, which corresponds to - * the first 256 characters of the Unicode range. Protoc can then use - * good old CEscape to generate the string. - * <p> - * So we have a string literal which represents a set of bytes which - * represents another string. This function -- stringDefaultValue -- - * converts from the generated string to the string we actually want. The - * generated code calls this automatically. - */ - public static String stringDefaultValue(String bytes) { - return new String(bytes.getBytes(ISO_8859_1), InternalNano.UTF_8); - } - - /** - * Helper called by generated code to construct default values for bytes - * fields. - * <p> - * This is a lot like {@link #stringDefaultValue}, but for bytes fields. - * In this case we only need the second of the two hacks -- allowing us to - * embed raw bytes as a string literal with ISO-8859-1 encoding. - */ - public static byte[] bytesDefaultValue(String bytes) { - return bytes.getBytes(ISO_8859_1); - } - - /** - * Helper function to convert a string into UTF-8 while turning the - * UnsupportedEncodingException to a RuntimeException. - */ - public static byte[] copyFromUtf8(final String text) { - return text.getBytes(InternalNano.UTF_8); - } - - /** - * Checks repeated int field equality; null-value and 0-length fields are - * considered equal. - */ - public static boolean equals(int[] field1, int[] field2) { - if (field1 == null || field1.length == 0) { - return field2 == null || field2.length == 0; - } else { - return Arrays.equals(field1, field2); - } - } - - /** - * Checks repeated long field equality; null-value and 0-length fields are - * considered equal. - */ - public static boolean equals(long[] field1, long[] field2) { - if (field1 == null || field1.length == 0) { - return field2 == null || field2.length == 0; - } else { - return Arrays.equals(field1, field2); - } - } - - /** - * Checks repeated float field equality; null-value and 0-length fields are - * considered equal. - */ - public static boolean equals(float[] field1, float[] field2) { - if (field1 == null || field1.length == 0) { - return field2 == null || field2.length == 0; - } else { - return Arrays.equals(field1, field2); - } - } - - /** - * Checks repeated double field equality; null-value and 0-length fields are - * considered equal. - */ - public static boolean equals(double[] field1, double[] field2) { - if (field1 == null || field1.length == 0) { - return field2 == null || field2.length == 0; - } else { - return Arrays.equals(field1, field2); - } - } - - /** - * Checks repeated boolean field equality; null-value and 0-length fields are - * considered equal. - */ - public static boolean equals(boolean[] field1, boolean[] field2) { - if (field1 == null || field1.length == 0) { - return field2 == null || field2.length == 0; - } else { - return Arrays.equals(field1, field2); - } - } - - /** - * Checks repeated bytes field equality. Only non-null elements are tested. - * Returns true if the two fields have the same sequence of non-null - * elements. Null-value fields and fields of any length with only null - * elements are considered equal. - */ - public static boolean equals(byte[][] field1, byte[][] field2) { - int index1 = 0; - int length1 = field1 == null ? 0 : field1.length; - int index2 = 0; - int length2 = field2 == null ? 0 : field2.length; - while (true) { - while (index1 < length1 && field1[index1] == null) { - index1++; - } - while (index2 < length2 && field2[index2] == null) { - index2++; - } - boolean atEndOf1 = index1 >= length1; - boolean atEndOf2 = index2 >= length2; - if (atEndOf1 && atEndOf2) { - // no more non-null elements to test in both arrays - return true; - } else if (atEndOf1 != atEndOf2) { - // one of the arrays have extra non-null elements - return false; - } else if (!Arrays.equals(field1[index1], field2[index2])) { - // element mismatch - return false; - } - index1++; - index2++; - } - } - - /** - * Checks repeated string/message field equality. Only non-null elements are - * tested. Returns true if the two fields have the same sequence of non-null - * elements. Null-value fields and fields of any length with only null - * elements are considered equal. - */ - public static boolean equals(Object[] field1, Object[] field2) { - int index1 = 0; - int length1 = field1 == null ? 0 : field1.length; - int index2 = 0; - int length2 = field2 == null ? 0 : field2.length; - while (true) { - while (index1 < length1 && field1[index1] == null) { - index1++; - } - while (index2 < length2 && field2[index2] == null) { - index2++; - } - boolean atEndOf1 = index1 >= length1; - boolean atEndOf2 = index2 >= length2; - if (atEndOf1 && atEndOf2) { - // no more non-null elements to test in both arrays - return true; - } else if (atEndOf1 != atEndOf2) { - // one of the arrays have extra non-null elements - return false; - } else if (!field1[index1].equals(field2[index2])) { - // element mismatch - return false; - } - index1++; - index2++; - } - } - - /** - * Computes the hash code of a repeated int field. Null-value and 0-length - * fields have the same hash code. - */ - public static int hashCode(int[] field) { - return field == null || field.length == 0 ? 0 : Arrays.hashCode(field); - } - - /** - * Computes the hash code of a repeated long field. Null-value and 0-length - * fields have the same hash code. - */ - public static int hashCode(long[] field) { - return field == null || field.length == 0 ? 0 : Arrays.hashCode(field); - } - - /** - * Computes the hash code of a repeated float field. Null-value and 0-length - * fields have the same hash code. - */ - public static int hashCode(float[] field) { - return field == null || field.length == 0 ? 0 : Arrays.hashCode(field); - } - - /** - * Computes the hash code of a repeated double field. Null-value and 0-length - * fields have the same hash code. - */ - public static int hashCode(double[] field) { - return field == null || field.length == 0 ? 0 : Arrays.hashCode(field); - } - - /** - * Computes the hash code of a repeated boolean field. Null-value and 0-length - * fields have the same hash code. - */ - public static int hashCode(boolean[] field) { - return field == null || field.length == 0 ? 0 : Arrays.hashCode(field); - } - - /** - * Computes the hash code of a repeated bytes field. Only the sequence of all - * non-null elements are used in the computation. Null-value fields and fields - * of any length with only null elements have the same hash code. - */ - public static int hashCode(byte[][] field) { - int result = 0; - for (int i = 0, size = field == null ? 0 : field.length; i < size; i++) { - byte[] element = field[i]; - if (element != null) { - result = 31 * result + Arrays.hashCode(element); - } - } - return result; - } - - /** - * Computes the hash code of a repeated string/message field. Only the - * sequence of all non-null elements are used in the computation. Null-value - * fields and fields of any length with only null elements have the same hash - * code. - */ - public static int hashCode(Object[] field) { - int result = 0; - for (int i = 0, size = field == null ? 0 : field.length; i < size; i++) { - Object element = field[i]; - if (element != null) { - result = 31 * result + element.hashCode(); - } - } - return result; - } - private static Object primitiveDefaultValue(int type) { - switch (type) { - case TYPE_BOOL: - return Boolean.FALSE; - case TYPE_BYTES: - return WireFormatNano.EMPTY_BYTES; - case TYPE_STRING: - return ""; - case TYPE_FLOAT: - return Float.valueOf(0); - case TYPE_DOUBLE: - return Double.valueOf(0); - case TYPE_ENUM: - case TYPE_FIXED32: - case TYPE_INT32: - case TYPE_UINT32: - case TYPE_SINT32: - case TYPE_SFIXED32: - return Integer.valueOf(0); - case TYPE_INT64: - case TYPE_UINT64: - case TYPE_SINT64: - case TYPE_FIXED64: - case TYPE_SFIXED64: - return Long.valueOf(0L); - case TYPE_MESSAGE: - case TYPE_GROUP: - default: - throw new IllegalArgumentException( - "Type: " + type + " is not a primitive type."); - } - } - - /** - * Merges the map entry into the map field. Note this is only supposed to - * be called by generated messages. - * - * @param map the map field; may be null, in which case a map will be - * instantiated using the {@link MapFactories.MapFactory} - * @param input the input byte buffer - * @param keyType key type, as defined in InternalNano.TYPE_* - * @param valueType value type, as defined in InternalNano.TYPE_* - * @param value an new instance of the value, if the value is a TYPE_MESSAGE; - * otherwise this parameter can be null and will be ignored. - * @param keyTag wire tag for the key - * @param valueTag wire tag for the value - * @return the map field - * @throws IOException - */ - @SuppressWarnings("unchecked") - public static final <K, V> Map<K, V> mergeMapEntry( - CodedInputByteBufferNano input, - Map<K, V> map, - MapFactory mapFactory, - int keyType, - int valueType, - V value, - int keyTag, - int valueTag) throws IOException { - map = mapFactory.forMap(map); - final int length = input.readRawVarint32(); - final int oldLimit = input.pushLimit(length); - K key = null; - while (true) { - int tag = input.readTag(); - if (tag == 0) { - break; - } - if (tag == keyTag) { - key = (K) input.readPrimitiveField(keyType); - } else if (tag == valueTag) { - if (valueType == TYPE_MESSAGE) { - input.readMessage((MessageNano) value); - } else { - value = (V) input.readPrimitiveField(valueType); - } - } else { - if (!input.skipField(tag)) { - break; - } - } - } - input.checkLastTagWas(0); - input.popLimit(oldLimit); - - if (key == null) { - // key can only be primitive types. - key = (K) primitiveDefaultValue(keyType); - } - - if (value == null) { - // message type value will be initialized by code-gen. - value = (V) primitiveDefaultValue(valueType); - } - - map.put(key, value); - return map; - } - - public static <K, V> void serializeMapField( - CodedOutputByteBufferNano output, - Map<K, V> map, int number, int keyType, int valueType) - throws IOException { - for (Entry<K, V> entry: map.entrySet()) { - K key = entry.getKey(); - V value = entry.getValue(); - if (key == null || value == null) { - throw new IllegalStateException( - "keys and values in maps cannot be null"); - } - int entrySize = - CodedOutputByteBufferNano.computeFieldSize(1, keyType, key) + - CodedOutputByteBufferNano.computeFieldSize(2, valueType, value); - output.writeTag(number, WireFormatNano.WIRETYPE_LENGTH_DELIMITED); - output.writeRawVarint32(entrySize); - output.writeField(1, keyType, key); - output.writeField(2, valueType, value); - } - } - - public static <K, V> int computeMapFieldSize( - Map<K, V> map, int number, int keyType, int valueType) { - int size = 0; - int tagSize = CodedOutputByteBufferNano.computeTagSize(number); - for (Entry<K, V> entry: map.entrySet()) { - K key = entry.getKey(); - V value = entry.getValue(); - if (key == null || value == null) { - throw new IllegalStateException( - "keys and values in maps cannot be null"); - } - int entrySize = - CodedOutputByteBufferNano.computeFieldSize(1, keyType, key) + - CodedOutputByteBufferNano.computeFieldSize(2, valueType, value); - size += tagSize + entrySize - + CodedOutputByteBufferNano.computeRawVarint32Size(entrySize); - } - return size; - } - - /** - * Checks whether two {@link Map} are equal. We don't use the default equals - * method of {@link Map} because it compares by identity not by content for - * byte arrays. - */ - public static <K, V> boolean equals(Map<K, V> a, Map<K, V> b) { - if (a == b) { - return true; - } - if (a == null) { - return b.size() == 0; - } - if (b == null) { - return a.size() == 0; - } - if (a.size() != b.size()) { - return false; - } - for (Entry<K, V> entry : a.entrySet()) { - if (!b.containsKey(entry.getKey())) { - return false; - } - if (!equalsMapValue(entry.getValue(), b.get(entry.getKey()))) { - return false; - } - } - return true; - } - - private static boolean equalsMapValue(Object a, Object b) { - if (a == null || b == null) { - throw new IllegalStateException( - "keys and values in maps cannot be null"); - } - if (a instanceof byte[] && b instanceof byte[]) { - return Arrays.equals((byte[]) a, (byte[]) b); - } - return a.equals(b); - } - - public static <K, V> int hashCode(Map<K, V> map) { - if (map == null) { - return 0; - } - int result = 0; - for (Entry<K, V> entry : map.entrySet()) { - result += hashCodeForMap(entry.getKey()) - ^ hashCodeForMap(entry.getValue()); - } - return result; - } - - private static int hashCodeForMap(Object o) { - if (o instanceof byte[]) { - return Arrays.hashCode((byte[]) o); - } - return o.hashCode(); - } - - // This avoids having to make FieldArray public. - public static void cloneUnknownFieldData(ExtendableMessageNano original, - ExtendableMessageNano cloned) { - if (original.unknownFieldData != null) { - cloned.unknownFieldData = (FieldArray) original.unknownFieldData.clone(); - } - } -} |