jp.co.yahoo.yosegi.message.design.java.JavaObjectToField Maven / Gradle / Ivy
/**
* 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 jp.co.yahoo.yosegi.message.design.java;
import jp.co.yahoo.yosegi.message.design.ArrayContainerField;
import jp.co.yahoo.yosegi.message.design.BooleanField;
import jp.co.yahoo.yosegi.message.design.ByteField;
import jp.co.yahoo.yosegi.message.design.BytesField;
import jp.co.yahoo.yosegi.message.design.DoubleField;
import jp.co.yahoo.yosegi.message.design.FloatField;
import jp.co.yahoo.yosegi.message.design.IField;
import jp.co.yahoo.yosegi.message.design.IntegerField;
import jp.co.yahoo.yosegi.message.design.LongField;
import jp.co.yahoo.yosegi.message.design.MapContainerField;
import jp.co.yahoo.yosegi.message.design.NullField;
import jp.co.yahoo.yosegi.message.design.Properties;
import jp.co.yahoo.yosegi.message.design.ShortField;
import jp.co.yahoo.yosegi.message.design.StringField;
import jp.co.yahoo.yosegi.message.design.StructContainerField;
import jp.co.yahoo.yosegi.message.design.UnionField;
import java.io.IOException;
import java.util.List;
import java.util.Map;
public final class JavaObjectToField {
private JavaObjectToField() {}
/**
* Create an IField from a Java object representing the schema structure.
*/
public static IField get( final Map javaObject ) throws IOException {
String type = javaObject.get( "type" ).toString();
Properties properties = new Properties();
Map propertiesObj = (Map)javaObject.get( "properties" );
for ( Map.Entry entry : propertiesObj.entrySet() ) {
properties.set( entry.getKey().toString() , entry.getValue().toString() );
}
String name = javaObject.get( "name" ).toString();
List> child = (List>)javaObject.get( "child" );
switch ( type ) {
case "ARRAY":
IField arrayChild = get( child.get(0) );
return new ArrayContainerField( name , arrayChild , properties );
case "UNION":
UnionField union = new UnionField( name , properties );
for ( Map childObj : child ) {
union.set( get( childObj ) );
}
return union;
case "MAP":
IField defaultField = get( (Map)javaObject.get( "default" ) );
MapContainerField map = new MapContainerField( name , defaultField , properties );
for ( Map childObj : child ) {
map.set( get( childObj ) );
}
return map;
case "STRUCT":
StructContainerField struct = new StructContainerField( name , properties );
for ( Map childObj : child ) {
struct.set( get( childObj ) );
}
return struct;
case "BOOLEN":
return new BooleanField( name , properties );
case "BYTE":
return new ByteField( name , properties );
case "BYTES":
return new BytesField( name , properties );
case "DOUBLE":
return new DoubleField( name , properties );
case "FLOAT":
return new FloatField( name , properties );
case "INTEGER":
return new IntegerField( name , properties );
case "LONG":
return new LongField( name , properties );
case "SHORT":
return new ShortField( name , properties );
case "STRING":
return new StringField( name , properties );
case "NULL":
return new NullField( name , properties );
default:
throw new IOException( "Invalid schema type." );
}
}
}