| // Protocol Buffers - Google's data interchange format |
| // Copyright 2014 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 java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| /** |
| * Stores unknown fields. These might be extensions or fields that the generated API doesn't |
| * know about yet. |
| */ |
| class FieldData implements Cloneable { |
| private Extension<?, ?> cachedExtension; |
| private Object value; |
| /** The serialised values for this object. Will be cleared if getValue is called */ |
| private List<UnknownFieldData> unknownFieldData; |
| |
| <T> FieldData(Extension<?, T> extension, T newValue) { |
| cachedExtension = extension; |
| value = newValue; |
| } |
| |
| FieldData() { |
| unknownFieldData = new ArrayList<UnknownFieldData>(); |
| } |
| |
| void addUnknownField(UnknownFieldData unknownField) { |
| unknownFieldData.add(unknownField); |
| } |
| |
| UnknownFieldData getUnknownField(int index) { |
| if (unknownFieldData == null) { |
| return null; |
| } |
| if (index < unknownFieldData.size()) { |
| return unknownFieldData.get(index); |
| } |
| return null; |
| } |
| |
| int getUnknownFieldSize() { |
| if (unknownFieldData == null) { |
| return 0; |
| } |
| return unknownFieldData.size(); |
| } |
| |
| <T> T getValue(Extension<?, T> extension) { |
| if (value != null){ |
| if (cachedExtension != extension) { // Extension objects are singletons. |
| throw new IllegalStateException( |
| "Tried to getExtension with a differernt Extension."); |
| } |
| } else { |
| cachedExtension = extension; |
| value = extension.getValueFrom(unknownFieldData); |
| unknownFieldData = null; |
| } |
| return (T) value; |
| } |
| |
| <T> void setValue(Extension<?, T> extension, T newValue) { |
| cachedExtension = extension; |
| value = newValue; |
| unknownFieldData = null; |
| } |
| |
| int computeSerializedSize() { |
| int size = 0; |
| if (value != null) { |
| size = cachedExtension.computeSerializedSize(value); |
| } else { |
| for (UnknownFieldData unknownField : unknownFieldData) { |
| size += unknownField.computeSerializedSize(); |
| } |
| } |
| return size; |
| } |
| |
| void writeTo(CodedOutputByteBufferNano output) throws IOException { |
| if (value != null) { |
| cachedExtension.writeTo(value, output); |
| } else { |
| for (UnknownFieldData unknownField : unknownFieldData) { |
| unknownField.writeTo(output); |
| } |
| } |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o == this) { |
| return true; |
| } |
| if (!(o instanceof FieldData)) { |
| return false; |
| } |
| |
| FieldData other = (FieldData) o; |
| if (value != null && other.value != null) { |
| // If both objects have deserialized values, compare those. |
| // Since unknown fields are only compared if messages have generated equals methods |
| // we know this will be a meaningful comparison (not identity) for all values. |
| if (cachedExtension != other.cachedExtension) { // Extension objects are singletons. |
| return false; |
| } |
| if (!cachedExtension.clazz.isArray()) { |
| // Can't test (!cachedExtension.repeated) due to 'bytes' -> 'byte[]' |
| return value.equals(other.value); |
| } |
| if (value instanceof byte[]) { |
| return Arrays.equals((byte[]) value, (byte[]) other.value); |
| } else if (value instanceof int[]) { |
| return Arrays.equals((int[]) value, (int[]) other.value); |
| } else if (value instanceof long[]) { |
| return Arrays.equals((long[]) value, (long[]) other.value); |
| } else if (value instanceof float[]) { |
| return Arrays.equals((float[]) value, (float[]) other.value); |
| } else if (value instanceof double[]) { |
| return Arrays.equals((double[]) value, (double[]) other.value); |
| } else if (value instanceof boolean[]) { |
| return Arrays.equals((boolean[]) value, (boolean[]) other.value); |
| } else { |
| return Arrays.deepEquals((Object[]) value, (Object[]) other.value); |
| } |
| } |
| if (unknownFieldData != null && other.unknownFieldData != null) { |
| // If both objects have byte arrays compare those directly. |
| return unknownFieldData.equals(other.unknownFieldData); |
| } |
| try { |
| // As a last resort, serialize and compare the resulting byte arrays. |
| return Arrays.equals(toByteArray(), other.toByteArray()); |
| } catch (IOException e) { |
| // Should not happen. |
| throw new IllegalStateException(e); |
| } |
| } |
| |
| @Override |
| public int hashCode() { |
| int result = 17; |
| try { |
| // The only way to generate a consistent hash is to use the serialized form. |
| result = 31 * result + Arrays.hashCode(toByteArray()); |
| } catch (IOException e) { |
| // Should not happen. |
| throw new IllegalStateException(e); |
| } |
| return result; |
| } |
| |
| private byte[] toByteArray() throws IOException { |
| byte[] result = new byte[computeSerializedSize()]; |
| CodedOutputByteBufferNano output = CodedOutputByteBufferNano.newInstance(result); |
| writeTo(output); |
| return result; |
| } |
| |
| @Override |
| public final FieldData clone() { |
| FieldData clone = new FieldData(); |
| try { |
| clone.cachedExtension = cachedExtension; |
| if (unknownFieldData == null) { |
| clone.unknownFieldData = null; |
| } else { |
| clone.unknownFieldData.addAll(unknownFieldData); |
| } |
| |
| // Whether we need to deep clone value depends on its type. Primitive reference types |
| // (e.g. Integer, Long etc.) are ok, since they're immutable. We need to clone arrays |
| // and messages. |
| if (value == null) { |
| // No cloning required. |
| } else if (value instanceof MessageNano) { |
| clone.value = ((MessageNano) value).clone(); |
| } else if (value instanceof byte[]) { |
| clone.value = ((byte[]) value).clone(); |
| } else if (value instanceof byte[][]) { |
| byte[][] valueArray = (byte[][]) value; |
| byte[][] cloneArray = new byte[valueArray.length][]; |
| clone.value = cloneArray; |
| for (int i = 0; i < valueArray.length; i++) { |
| cloneArray[i] = valueArray[i].clone(); |
| } |
| } else if (value instanceof boolean[]) { |
| clone.value = ((boolean[]) value).clone(); |
| } else if (value instanceof int[]) { |
| clone.value = ((int[]) value).clone(); |
| } else if (value instanceof long[]) { |
| clone.value = ((long[]) value).clone(); |
| } else if (value instanceof float[]) { |
| clone.value = ((float[]) value).clone(); |
| } else if (value instanceof double[]) { |
| clone.value = ((double[]) value).clone(); |
| } else if (value instanceof MessageNano[]) { |
| MessageNano[] valueArray = (MessageNano[]) value; |
| MessageNano[] cloneArray = new MessageNano[valueArray.length]; |
| clone.value = cloneArray; |
| for (int i = 0; i < valueArray.length; i++) { |
| cloneArray[i] = valueArray[i].clone(); |
| } |
| } |
| return clone; |
| } catch (CloneNotSupportedException e) { |
| throw new AssertionError(e); |
| } |
| } |
| } |