kafka Field 源码
kafka Field 代码
文件路径:/clients/src/main/java/org/apache/kafka/common/protocol/types/Field.java
/*
* 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.kafka.common.protocol.types;
public class Field {
public final String name;
public final String docString;
public final Type type;
public final boolean hasDefaultValue;
public final Object defaultValue;
public Field(String name, Type type, String docString, boolean hasDefaultValue, Object defaultValue) {
this.name = name;
this.docString = docString;
this.type = type;
this.hasDefaultValue = hasDefaultValue;
this.defaultValue = defaultValue;
if (hasDefaultValue)
type.validate(defaultValue);
}
public Field(String name, Type type, String docString) {
this(name, type, docString, false, null);
}
public Field(String name, Type type, String docString, Object defaultValue) {
this(name, type, docString, true, defaultValue);
}
public Field(String name, Type type) {
this(name, type, null, false, null);
}
public static class Int8 extends Field {
public Int8(String name, String docString) {
super(name, Type.INT8, docString, false, null);
}
public Int8(String name, String docString, byte defaultValue) {
super(name, Type.INT8, docString, true, defaultValue);
}
}
public static class Int32 extends Field {
public Int32(String name, String docString) {
super(name, Type.INT32, docString, false, null);
}
public Int32(String name, String docString, int defaultValue) {
super(name, Type.INT32, docString, true, defaultValue);
}
}
public static class Int64 extends Field {
public Int64(String name, String docString) {
super(name, Type.INT64, docString, false, null);
}
public Int64(String name, String docString, long defaultValue) {
super(name, Type.INT64, docString, true, defaultValue);
}
}
public static class UUID extends Field {
public UUID(String name, String docString) {
super(name, Type.UUID, docString, false, null);
}
public UUID(String name, String docString, UUID defaultValue) {
super(name, Type.UUID, docString, true, defaultValue);
}
}
public static class Int16 extends Field {
public Int16(String name, String docString) {
super(name, Type.INT16, docString, false, null);
}
}
public static class Uint16 extends Field {
public Uint16(String name, String docString) {
super(name, Type.UINT16, docString, false, null);
}
}
public static class Uint32 extends Field {
public Uint32(String name, String docString) {
super(name, Type.UNSIGNED_INT32, docString, false, null);
}
}
public static class Float64 extends Field {
public Float64(String name, String docString) {
super(name, Type.FLOAT64, docString, false, null);
}
public Float64(String name, String docString, double defaultValue) {
super(name, Type.FLOAT64, docString, true, defaultValue);
}
}
public static class Str extends Field {
public Str(String name, String docString) {
super(name, Type.STRING, docString, false, null);
}
}
public static class CompactStr extends Field {
public CompactStr(String name, String docString) {
super(name, Type.COMPACT_STRING, docString, false, null);
}
}
public static class NullableStr extends Field {
public NullableStr(String name, String docString) {
super(name, Type.NULLABLE_STRING, docString, false, null);
}
}
public static class CompactNullableStr extends Field {
public CompactNullableStr(String name, String docString) {
super(name, Type.COMPACT_NULLABLE_STRING, docString, false, null);
}
}
public static class Bool extends Field {
public Bool(String name, String docString) {
super(name, Type.BOOLEAN, docString, false, null);
}
}
public static class Array extends Field {
public Array(String name, Type elementType, String docString) {
super(name, new ArrayOf(elementType), docString, false, null);
}
}
public static class CompactArray extends Field {
public CompactArray(String name, Type elementType, String docString) {
super(name, new CompactArrayOf(elementType), docString, false, null);
}
}
public static class TaggedFieldsSection extends Field {
private static final String NAME = "_tagged_fields";
private static final String DOC_STRING = "The tagged fields";
/**
* Create a new TaggedFieldsSection with the given tags and fields.
*
* @param fields This is an array containing Integer tags followed
* by associated Field objects.
* @return The new {@link TaggedFieldsSection}
*/
public static TaggedFieldsSection of(Object... fields) {
return new TaggedFieldsSection(TaggedFields.of(fields));
}
public TaggedFieldsSection(Type type) {
super(NAME, type, DOC_STRING, false, null);
}
}
public static class ComplexArray {
public final String name;
public final String docString;
public ComplexArray(String name, String docString) {
this.name = name;
this.docString = docString;
}
public Field withFields(Field... fields) {
Schema elementType = new Schema(fields);
return new Field(name, new ArrayOf(elementType), docString, false, null);
}
public Field nullableWithFields(Field... fields) {
Schema elementType = new Schema(fields);
return new Field(name, ArrayOf.nullable(elementType), docString, false, null);
}
public Field withFields(String docStringOverride, Field... fields) {
Schema elementType = new Schema(fields);
return new Field(name, new ArrayOf(elementType), docStringOverride, false, null);
}
}
}
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