/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.apache.flink.api.common.typeinfo;
import java.util.HashMap;
import java.util.Map;
import java.util.Objects;
import org.apache.flink.annotation.PublicEvolving;
import org.apache.flink.annotation.Public;
import org.apache.flink.api.common.ExecutionConfig;
import org.apache.flink.api.common.typeutils.TypeSerializer;
import org.apache.flink.api.common.typeutils.base.array.StringArraySerializer;
import org.apache.flink.api.common.functions.InvalidTypesException;
import org.apache.flink.api.common.typeutils.base.GenericArraySerializer;
import static org.apache.flink.util.Preconditions.checkNotNull;
@Public
public final class BasicArrayTypeInfo<T, C> extends TypeInformation<T> {
private static final long serialVersionUID = 1L;
public static final BasicArrayTypeInfo<String[], String> STRING_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<String[], String>(String[].class, BasicTypeInfo.STRING_TYPE_INFO);
public static final BasicArrayTypeInfo<Boolean[], Boolean> BOOLEAN_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Boolean[], Boolean>(Boolean[].class, BasicTypeInfo.BOOLEAN_TYPE_INFO);
public static final BasicArrayTypeInfo<Byte[], Byte> BYTE_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Byte[], Byte>(Byte[].class, BasicTypeInfo.BYTE_TYPE_INFO);
public static final BasicArrayTypeInfo<Short[], Short> SHORT_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Short[], Short>(Short[].class, BasicTypeInfo.SHORT_TYPE_INFO);
public static final BasicArrayTypeInfo<Integer[], Integer> INT_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Integer[], Integer>(Integer[].class, BasicTypeInfo.INT_TYPE_INFO);
public static final BasicArrayTypeInfo<Long[], Long> LONG_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Long[], Long>(Long[].class, BasicTypeInfo.LONG_TYPE_INFO);
public static final BasicArrayTypeInfo<Float[], Float> FLOAT_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Float[], Float>(Float[].class, BasicTypeInfo.FLOAT_TYPE_INFO);
public static final BasicArrayTypeInfo<Double[], Double> DOUBLE_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Double[], Double>(Double[].class, BasicTypeInfo.DOUBLE_TYPE_INFO);
public static final BasicArrayTypeInfo<Character[], Character> CHAR_ARRAY_TYPE_INFO = new BasicArrayTypeInfo<Character[], Character>(Character[].class, BasicTypeInfo.CHAR_TYPE_INFO);
// --------------------------------------------------------------------------------------------
private final Class<T> arrayClass;
private final TypeInformation<C> componentInfo;
private BasicArrayTypeInfo(Class<T> arrayClass, BasicTypeInfo<C> componentInfo) {
this.arrayClass = checkNotNull(arrayClass);
this.componentInfo = checkNotNull(componentInfo);
}
// --------------------------------------------------------------------------------------------
@Override
@PublicEvolving
public boolean isBasicType() {
return false;
}
@Override
@PublicEvolving
public boolean isTupleType() {
return false;
}
@Override
@PublicEvolving
public int getArity() {
return 1;
}
@Override
@PublicEvolving
public int getTotalFields() {
return 1;
}
@Override
@PublicEvolving
public Class<T> getTypeClass() {
return this.arrayClass;
}
@PublicEvolving
public Class<C> getComponentTypeClass() {
return this.componentInfo.getTypeClass();
}
@PublicEvolving
public TypeInformation<C> getComponentInfo() {
return componentInfo;
}
@Override
@PublicEvolving
public boolean isKeyType() {
return false;
}
@Override
@SuppressWarnings("unchecked")
@PublicEvolving
public TypeSerializer<T> createSerializer(ExecutionConfig executionConfig) {
// special case the string array
if (componentInfo.getTypeClass().equals(String.class)) {
return (TypeSerializer<T>) StringArraySerializer.INSTANCE;
} else {
return (TypeSerializer<T>) new GenericArraySerializer<C>(
this.componentInfo.getTypeClass(),
this.componentInfo.createSerializer(executionConfig));
}
}
@Override
public boolean equals(Object obj) {
if (obj instanceof BasicArrayTypeInfo) {
BasicArrayTypeInfo<?, ?> other = (BasicArrayTypeInfo<?, ?>) obj;
return other.canEqual(this) &&
arrayClass == other.arrayClass &&
componentInfo.equals(other.componentInfo);
} else {
return false;
}
}
@Override
public int hashCode() {
return Objects.hash(arrayClass, componentInfo);
}
@Override
public boolean canEqual(Object obj) {
return obj instanceof BasicArrayTypeInfo;
}
@Override
public String toString() {
return this.getClass().getSimpleName()+"<"+this.componentInfo+">";
}
// --------------------------------------------------------------------------------------------
@SuppressWarnings("unchecked")
@PublicEvolving
public static <X, C> BasicArrayTypeInfo<X, C> getInfoFor(Class<X> type) {
if (!type.isArray()) {
throw new InvalidTypesException("The given class is no array.");
}
// basic type arrays
return (BasicArrayTypeInfo<X, C>) TYPES.get(type);
}
private static final Map<Class<?>, BasicArrayTypeInfo<?, ?>> TYPES = new HashMap<Class<?>, BasicArrayTypeInfo<?, ?>>();
static {
TYPES.put(String[].class, STRING_ARRAY_TYPE_INFO);
TYPES.put(Boolean[].class, BOOLEAN_ARRAY_TYPE_INFO);
TYPES.put(Byte[].class, BYTE_ARRAY_TYPE_INFO);
TYPES.put(Short[].class, SHORT_ARRAY_TYPE_INFO);
TYPES.put(Integer[].class, INT_ARRAY_TYPE_INFO);
TYPES.put(Long[].class, LONG_ARRAY_TYPE_INFO);
TYPES.put(Float[].class, FLOAT_ARRAY_TYPE_INFO);
TYPES.put(Double[].class, DOUBLE_ARRAY_TYPE_INFO);
TYPES.put(Character[].class, CHAR_ARRAY_TYPE_INFO);
}
}