FieldTypeInfo.java
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上传日期:2018-01-08
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文件大小:3k
- /**
- * 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.hadoop.record.meta;
- import java.io.IOException;
- import org.apache.hadoop.record.RecordOutput;
- /**
- * Represents a type information for a field, which is made up of its
- * ID (name) and its type (a TypeID object).
- */
- public class FieldTypeInfo
- {
- private String fieldID;
- private TypeID typeID;
- /**
- * Construct a FiledTypeInfo with the given field name and the type
- */
- FieldTypeInfo(String fieldID, TypeID typeID) {
- this.fieldID = fieldID;
- this.typeID = typeID;
- }
- /**
- * get the field's TypeID object
- */
- public TypeID getTypeID() {
- return typeID;
- }
-
- /**
- * get the field's id (name)
- */
- public String getFieldID() {
- return fieldID;
- }
-
- void write(RecordOutput rout, String tag) throws IOException {
- rout.writeString(fieldID, tag);
- typeID.write(rout, tag);
- }
-
- /**
- * Two FieldTypeInfos are equal if ach of their fields matches
- */
- public boolean equals(Object o) {
- if (this == o)
- return true;
- if (!(o instanceof FieldTypeInfo))
- return false;
- FieldTypeInfo fti = (FieldTypeInfo) o;
- // first check if fieldID matches
- if (!this.fieldID.equals(fti.fieldID)) {
- return false;
- }
- // now see if typeID matches
- return (this.typeID.equals(fti.typeID));
- }
-
- /**
- * We use a basic hashcode implementation, since this class will likely not
- * be used as a hashmap key
- */
- public int hashCode() {
- return 37*17+typeID.hashCode() + 37*17+fieldID.hashCode();
- }
-
- public boolean equals(FieldTypeInfo ti) {
- // first check if fieldID matches
- if (!this.fieldID.equals(ti.fieldID)) {
- return false;
- }
- // now see if typeID matches
- return (this.typeID.equals(ti.typeID));
- }
- }