1 // Protocol Buffers - Google's data interchange format 2 // Copyright 2008 Google Inc. All rights reserved. 3 // 4 // Use of this source code is governed by a BSD-style 5 // license that can be found in the LICENSE file or at 6 // https://developers.google.com/open-source/licenses/bsd 7 8 package com.google.protobuf; 9 10 import com.google.protobuf.MapEntryLite.Metadata; 11 import java.util.Map; 12 13 @CheckReturnValue 14 final class MapFieldSchemaLite implements MapFieldSchema { 15 16 @Override forMutableMapData(Object mapField)17 public Map<?, ?> forMutableMapData(Object mapField) { 18 return (MapFieldLite<?, ?>) mapField; 19 } 20 21 @Override forMapMetadata(Object mapDefaultEntry)22 public Metadata<?, ?> forMapMetadata(Object mapDefaultEntry) { 23 return ((MapEntryLite<?, ?>) mapDefaultEntry).getMetadata(); 24 } 25 26 @Override forMapData(Object mapField)27 public Map<?, ?> forMapData(Object mapField) { 28 return (MapFieldLite<?, ?>) mapField; 29 } 30 31 @Override isImmutable(Object mapField)32 public boolean isImmutable(Object mapField) { 33 return !((MapFieldLite<?, ?>) mapField).isMutable(); 34 } 35 36 @Override toImmutable(Object mapField)37 public Object toImmutable(Object mapField) { 38 ((MapFieldLite<?, ?>) mapField).makeImmutable(); 39 return mapField; 40 } 41 42 @Override newMapField(Object unused)43 public Object newMapField(Object unused) { 44 return MapFieldLite.emptyMapField().mutableCopy(); 45 } 46 47 @Override mergeFrom(Object destMapField, Object srcMapField)48 public Object mergeFrom(Object destMapField, Object srcMapField) { 49 return mergeFromLite(destMapField, srcMapField); 50 } 51 52 @SuppressWarnings("unchecked") mergeFromLite(Object destMapField, Object srcMapField)53 private static <K, V> MapFieldLite<K, V> mergeFromLite(Object destMapField, Object srcMapField) { 54 MapFieldLite<K, V> mine = (MapFieldLite<K, V>) destMapField; 55 MapFieldLite<K, V> other = (MapFieldLite<K, V>) srcMapField; 56 if (!other.isEmpty()) { 57 if (!mine.isMutable()) { 58 mine = mine.mutableCopy(); 59 } 60 mine.mergeFrom(other); 61 } 62 return mine; 63 } 64 65 @Override getSerializedSize(int fieldNumber, Object mapField, Object mapDefaultEntry)66 public int getSerializedSize(int fieldNumber, Object mapField, Object mapDefaultEntry) { 67 return getSerializedSizeLite(fieldNumber, mapField, mapDefaultEntry); 68 } 69 70 @SuppressWarnings("unchecked") getSerializedSizeLite( int fieldNumber, Object mapField, Object defaultEntry)71 private static <K, V> int getSerializedSizeLite( 72 int fieldNumber, Object mapField, Object defaultEntry) { 73 MapFieldLite<K, V> mapFieldLite = (MapFieldLite<K, V>) mapField; 74 MapEntryLite<K, V> defaultEntryLite = (MapEntryLite<K, V>) defaultEntry; 75 76 if (mapFieldLite.isEmpty()) { 77 return 0; 78 } 79 int size = 0; 80 for (Map.Entry<K, V> entry : mapFieldLite.entrySet()) { 81 size += defaultEntryLite.computeMessageSize(fieldNumber, entry.getKey(), entry.getValue()); 82 } 83 return size; 84 } 85 } 86