1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package android.hardware.camera2.marshal.impl; 17 18 import android.hardware.camera2.marshal.Marshaler; 19 import android.hardware.camera2.marshal.MarshalQueryable; 20 import android.hardware.camera2.marshal.MarshalRegistry; 21 import android.hardware.camera2.utils.TypeReference; 22 import android.util.Pair; 23 24 import java.lang.reflect.Constructor; 25 import java.lang.reflect.InvocationTargetException; 26 import java.lang.reflect.ParameterizedType; 27 import java.lang.reflect.Type; 28 import java.nio.ByteBuffer; 29 30 /** 31 * Marshal {@link Pair} to/from any native type 32 */ 33 public class MarshalQueryablePair<T1, T2> 34 implements MarshalQueryable<Pair<T1, T2>> { 35 36 private class MarshalerPair extends Marshaler<Pair<T1, T2>> { 37 private final Class<? super Pair<T1, T2>> mClass; 38 private final Constructor<Pair<T1, T2>> mConstructor; 39 /** Marshal the {@code T1} inside of {@code Pair<T1, T2>} */ 40 private final Marshaler<T1> mNestedTypeMarshalerFirst; 41 /** Marshal the {@code T1} inside of {@code Pair<T1, T2>} */ 42 private final Marshaler<T2> mNestedTypeMarshalerSecond; 43 44 @SuppressWarnings("unchecked") MarshalerPair(TypeReference<Pair<T1, T2>> typeReference, int nativeType)45 protected MarshalerPair(TypeReference<Pair<T1, T2>> typeReference, 46 int nativeType) { 47 super(MarshalQueryablePair.this, typeReference, nativeType); 48 49 mClass = typeReference.getRawType(); 50 51 /* 52 * Lookup the actual type arguments, e.g. Pair<Integer, Float> --> [Integer, Float] 53 * and then get the marshalers for that managed type. 54 */ 55 ParameterizedType paramType; 56 try { 57 paramType = (ParameterizedType) typeReference.getType(); 58 } catch (ClassCastException e) { 59 throw new AssertionError("Raw use of Pair is not supported", e); 60 } 61 62 // Get type marshaler for T1 63 { 64 Type actualTypeArgument = paramType.getActualTypeArguments()[0]; 65 66 TypeReference<?> actualTypeArgToken = 67 TypeReference.createSpecializedTypeReference(actualTypeArgument); 68 69 mNestedTypeMarshalerFirst = (Marshaler<T1>)MarshalRegistry.getMarshaler( 70 actualTypeArgToken, mNativeType); 71 } 72 // Get type marshaler for T2 73 { 74 Type actualTypeArgument = paramType.getActualTypeArguments()[1]; 75 76 TypeReference<?> actualTypeArgToken = 77 TypeReference.createSpecializedTypeReference(actualTypeArgument); 78 79 mNestedTypeMarshalerSecond = (Marshaler<T2>)MarshalRegistry.getMarshaler( 80 actualTypeArgToken, mNativeType); 81 } 82 try { 83 mConstructor = (Constructor<Pair<T1, T2>>)mClass.getConstructor( 84 Object.class, Object.class); 85 } catch (NoSuchMethodException e) { 86 throw new AssertionError(e); 87 } 88 } 89 90 @Override marshal(Pair<T1, T2> value, ByteBuffer buffer)91 public void marshal(Pair<T1, T2> value, ByteBuffer buffer) { 92 if (value.first == null) { 93 throw new UnsupportedOperationException("Pair#first must not be null"); 94 } else if (value.second == null) { 95 throw new UnsupportedOperationException("Pair#second must not be null"); 96 } 97 98 mNestedTypeMarshalerFirst.marshal(value.first, buffer); 99 mNestedTypeMarshalerSecond.marshal(value.second, buffer); 100 } 101 102 @Override unmarshal(ByteBuffer buffer)103 public Pair<T1, T2> unmarshal(ByteBuffer buffer) { 104 T1 first = mNestedTypeMarshalerFirst.unmarshal(buffer); 105 T2 second = mNestedTypeMarshalerSecond.unmarshal(buffer); 106 107 try { 108 return mConstructor.newInstance(first, second); 109 } catch (InstantiationException e) { 110 throw new AssertionError(e); 111 } catch (IllegalAccessException e) { 112 throw new AssertionError(e); 113 } catch (IllegalArgumentException e) { 114 throw new AssertionError(e); 115 } catch (InvocationTargetException e) { 116 throw new AssertionError(e); 117 } 118 } 119 120 @Override getNativeSize()121 public int getNativeSize() { 122 int firstSize = mNestedTypeMarshalerFirst.getNativeSize(); 123 int secondSize = mNestedTypeMarshalerSecond.getNativeSize(); 124 125 if (firstSize != NATIVE_SIZE_DYNAMIC && secondSize != NATIVE_SIZE_DYNAMIC) { 126 return firstSize + secondSize; 127 } else { 128 return NATIVE_SIZE_DYNAMIC; 129 } 130 } 131 132 @Override calculateMarshalSize(Pair<T1, T2> value)133 public int calculateMarshalSize(Pair<T1, T2> value) { 134 int nativeSize = getNativeSize(); 135 136 if (nativeSize != NATIVE_SIZE_DYNAMIC) { 137 return nativeSize; 138 } else { 139 int firstSize = mNestedTypeMarshalerFirst.calculateMarshalSize(value.first); 140 int secondSize = mNestedTypeMarshalerSecond.calculateMarshalSize(value.second); 141 142 return firstSize + secondSize; 143 } 144 } 145 } 146 147 @Override createMarshaler(TypeReference<Pair<T1, T2>> managedType, int nativeType)148 public Marshaler<Pair<T1, T2>> createMarshaler(TypeReference<Pair<T1, T2>> managedType, 149 int nativeType) { 150 return new MarshalerPair(managedType, nativeType); 151 } 152 153 @Override isTypeMappingSupported(TypeReference<Pair<T1, T2>> managedType, int nativeType)154 public boolean isTypeMappingSupported(TypeReference<Pair<T1, T2>> managedType, int nativeType) { 155 return (Pair.class.equals(managedType.getRawType())); 156 } 157 158 } 159