/*
* Copyright (c) 2008-2016 MongoDB, Inc.
*
* Licensed 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.bson;
import static java.lang.String.format;
/**
* Base class for any BSON type.
*
* @since 3.0
*/
public abstract class BsonValue {
/**
* Construct a new instance. This is package-protected so that the BSON type system is closed.
*/
BsonValue() {
}
/**
* Gets the BSON type of this value.
*
* @return the BSON type, which may not be null (but may be BSONType.NULL)
*/
public abstract BsonType getBsonType();
/**
* Gets this value as a BsonDocument if it is one, otherwise throws exception
*
* @return a BsonDocument
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonDocument asDocument() {
throwIfInvalidType(BsonType.DOCUMENT);
return (BsonDocument) this;
}
/**
* Gets this value as a BsonArray if it is one, otherwise throws exception
*
* @return a BsonArray
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonArray asArray() {
throwIfInvalidType(BsonType.ARRAY);
return (BsonArray) this;
}
/**
* Gets this value as a BsonString if it is one, otherwise throws exception
*
* @return a BsonString
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonString asString() {
throwIfInvalidType(BsonType.STRING);
return (BsonString) this;
}
/**
* Gets this value as a BsonNumber if it is one, otherwise throws exception
*
* @return a BsonNumber
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonNumber asNumber() {
if (getBsonType() != BsonType.INT32 && getBsonType() != BsonType.INT64 && getBsonType() != BsonType.DOUBLE) {
throw new BsonInvalidOperationException(format("Value expected to be of a numerical BSON type is of unexpected type %s",
getBsonType()));
}
return (BsonNumber) this;
}
/**
* Gets this value as a BsonInt32 if it is one, otherwise throws exception
*
* @return a BsonInt32
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonInt32 asInt32() {
throwIfInvalidType(BsonType.INT32);
return (BsonInt32) this;
}
/**
* Gets this value as a BsonInt64 if it is one, otherwise throws exception
*
* @return a BsonInt64
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonInt64 asInt64() {
throwIfInvalidType(BsonType.INT64);
return (BsonInt64) this;
}
/**
* Gets this value as a BsonDecimal128 if it is one, otherwise throws exception
*
* @return a BsonDecimal128
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
* @since 3.4
*/
public BsonDecimal128 asDecimal128() {
throwIfInvalidType(BsonType.DECIMAL128);
return (BsonDecimal128) this;
}
/**
* Gets this value as a BsonDouble if it is one, otherwise throws exception
*
* @return a BsonDouble
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonDouble asDouble() {
throwIfInvalidType(BsonType.DOUBLE);
return (BsonDouble) this;
}
/**
* Gets this value as a BsonBoolean if it is one, otherwise throws exception
*
* @return a BsonBoolean
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonBoolean asBoolean() {
throwIfInvalidType(BsonType.BOOLEAN);
return (BsonBoolean) this;
}
/**
* Gets this value as an BsonObjectId if it is one, otherwise throws exception
*
* @return an BsonObjectId
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonObjectId asObjectId() {
throwIfInvalidType(BsonType.OBJECT_ID);
return (BsonObjectId) this;
}
/**
* Gets this value as a BsonDbPointer if it is one, otherwise throws exception
*
* @return an BsonDbPointer
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonDbPointer asDBPointer() {
throwIfInvalidType(BsonType.DB_POINTER);
return (BsonDbPointer) this;
}
/**
* Gets this value as a BsonTimestamp if it is one, otherwise throws exception
*
* @return an BsonTimestamp
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonTimestamp asTimestamp() {
throwIfInvalidType(BsonType.TIMESTAMP);
return (BsonTimestamp) this;
}
/**
* Gets this value as a BsonBinary if it is one, otherwise throws exception
*
* @return an BsonBinary
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonBinary asBinary() {
throwIfInvalidType(BsonType.BINARY);
return (BsonBinary) this;
}
/**
* Gets this value as a BsonDateTime if it is one, otherwise throws exception
*
* @return an BsonDateTime
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonDateTime asDateTime() {
throwIfInvalidType(BsonType.DATE_TIME);
return (BsonDateTime) this;
}
/**
* Gets this value as a BsonSymbol if it is one, otherwise throws exception
*
* @return an BsonSymbol
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonSymbol asSymbol() {
throwIfInvalidType(BsonType.SYMBOL);
return (BsonSymbol) this;
}
/**
* Gets this value as a BsonRegularExpression if it is one, otherwise throws exception
*
* @return an BsonRegularExpression
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonRegularExpression asRegularExpression() {
throwIfInvalidType(BsonType.REGULAR_EXPRESSION);
return (BsonRegularExpression) this;
}
/**
* Gets this value as a {@code BsonJavaScript} if it is one, otherwise throws exception
*
* @return a BsonJavaScript
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonJavaScript asJavaScript() {
throwIfInvalidType(BsonType.JAVASCRIPT);
return (BsonJavaScript) this;
}
/**
* Gets this value as a BsonJavaScriptWithScope if it is one, otherwise throws exception
*
* @return a BsonJavaScriptWithScope
* @throws org.bson.BsonInvalidOperationException if this value is not of the expected type
*/
public BsonJavaScriptWithScope asJavaScriptWithScope() {
throwIfInvalidType(BsonType.JAVASCRIPT_WITH_SCOPE);
return (BsonJavaScriptWithScope) this;
}
/**
* Returns true if this is a BsonNull, false otherwise.
*
* @return true if this is a BsonNull, false otherwise
*/
public boolean isNull() {
return this instanceof BsonNull;
}
/**
* Returns true if this is a BsonDocument, false otherwise.
*
* @return true if this is a BsonDocument, false otherwise
*/
public boolean isDocument() {
return this instanceof BsonDocument;
}
/**
* Returns true if this is a BsonArray, false otherwise.
*
* @return true if this is a BsonArray, false otherwise
*/
public boolean isArray() {
return this instanceof BsonArray;
}
/**
* Returns true if this is a BsonString, false otherwise.
*
* @return true if this is a BsonString, false otherwise
*/
public boolean isString() {
return this instanceof BsonString;
}
/**
* Returns true if this is a BsonNumber, false otherwise.
*
* @return true if this is a BsonNumber, false otherwise
*/
public boolean isNumber() {
return isInt32() || isInt64() || isDouble();
}
/**
* Returns true if this is a BsonInt32, false otherwise.
*
* @return true if this is a BsonInt32, false otherwise
*/
public boolean isInt32() {
return this instanceof BsonInt32;
}
/**
* Returns true if this is a BsonInt64, false otherwise.
*
* @return true if this is a BsonInt64, false otherwise
*/
public boolean isInt64() {
return this instanceof BsonInt64;
}
/**
* Returns true if this is a BsonDecimal128, false otherwise.
*
* @return true if this is a BsonDecimal128, false otherwise
* @since 3.4
*/
public boolean isDecimal128() {
return this instanceof BsonDecimal128;
}
/**
* Returns true if this is a BsonDouble, false otherwise.
*
* @return true if this is a BsonDouble, false otherwise
*/
public boolean isDouble() {
return this instanceof BsonDouble;
}
/**
* Returns true if this is a BsonBoolean, false otherwise.
*
* @return true if this is a BsonBoolean, false otherwise
*/
public boolean isBoolean() {
return this instanceof BsonBoolean;
}
/**
* Returns true if this is an BsonObjectId, false otherwise.
*
* @return true if this is an BsonObjectId, false otherwise
*/
public boolean isObjectId() {
return this instanceof BsonObjectId;
}
/**
* Returns true if this is a BsonDbPointer, false otherwise.
*
* @return true if this is a BsonDbPointer, false otherwise
*/
public boolean isDBPointer() {
return this instanceof BsonDbPointer;
}
/**
* Returns true if this is a BsonTimestamp, false otherwise.
*
* @return true if this is a BsonTimestamp, false otherwise
*/
public boolean isTimestamp() {
return this instanceof BsonTimestamp;
}
/**
* Returns true if this is a BsonBinary, false otherwise.
*
* @return true if this is a BsonBinary, false otherwise
*/
public boolean isBinary() {
return this instanceof BsonBinary;
}
/**
* Returns true if this is a BsonDateTime, false otherwise.
*
* @return true if this is a BsonDateTime, false otherwise
*/
public boolean isDateTime() {
return this instanceof BsonDateTime;
}
/**
* Returns true if this is a BsonSymbol, false otherwise.
*
* @return true if this is a BsonSymbol, false otherwise
*/
public boolean isSymbol() {
return this instanceof BsonSymbol;
}
/**
* Returns true if this is a BsonRegularExpression, false otherwise.
*
* @return true if this is a BsonRegularExpression, false otherwise
*/
public boolean isRegularExpression() {
return this instanceof BsonRegularExpression;
}
/**
* Returns true if this is a BsonJavaScript, false otherwise.
*
* @return true if this is a BsonJavaScript, false otherwise
*/
public boolean isJavaScript() {
return this instanceof BsonJavaScript;
}
/**
* Returns true if this is a BsonJavaScriptWithScope, false otherwise.
*
* @return true if this is a BsonJavaScriptWithScope, false otherwise
*/
public boolean isJavaScriptWithScope() {
return this instanceof BsonJavaScriptWithScope;
}
private void throwIfInvalidType(final BsonType expectedType) {
if (getBsonType() != expectedType) {
throw new BsonInvalidOperationException(format("Value expected to be of type %s is of unexpected type %s",
expectedType, getBsonType()));
}
}
}