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ValueWriter.java
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ValueWriter.java
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/*
* Copyright (c) 2002-2017 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.values.storable;
import java.nio.charset.StandardCharsets;
/**
* Writer of values.
* <p>
* Has functionality to write all supported primitives, as well as arrays and different representations of Strings.
*
* @param <E> type of {@link Exception} thrown from writer methods.
*/
public interface ValueWriter<E extends Exception>
{
enum ArrayType
{
BYTE,
SHORT,
INT,
LONG,
FLOAT,
DOUBLE,
BOOLEAN,
STRING,
CHAR
}
void writeNull() throws E;
void writeBoolean( boolean value ) throws E;
void writeInteger( byte value ) throws E;
void writeInteger( short value ) throws E;
void writeInteger( int value ) throws E;
void writeInteger( long value ) throws E;
void writeFloatingPoint( float value ) throws E;
void writeFloatingPoint( double value ) throws E;
void writeString( String value ) throws E;
void writeString( char value ) throws E;
default void writeUTF8( byte[] bytes, int offset, int length ) throws E
{
writeString( new String( bytes, offset, length, StandardCharsets.UTF_8 ) );
}
default void writeString( char[] value ) throws E
{
writeString( value, 0, value.length );
}
void writeString( char[] value, int offset, int length ) throws E;
void beginArray( int size, ArrayType arrayType ) throws E;
void endArray() throws E;
void writeByteArray( byte[] value ) throws E;
class Adapter<E extends Exception> implements ValueWriter<E>
{
@Override
public void writeNull() throws E
{ // no-op
}
@Override
public void writeBoolean( boolean value ) throws E
{ // no-op
}
@Override
public void writeInteger( byte value ) throws E
{ // no-op
}
@Override
public void writeInteger( short value ) throws E
{ // no-op
}
@Override
public void writeInteger( int value ) throws E
{ // no-op
}
@Override
public void writeInteger( long value ) throws E
{ // no-op
}
@Override
public void writeFloatingPoint( float value ) throws E
{ // no-op
}
@Override
public void writeFloatingPoint( double value ) throws E
{ // no-op
}
@Override
public void writeString( String value ) throws E
{ // no-op
}
@Override
public void writeString( char value ) throws E
{ // no-op
}
@Override
public void writeString( char[] value, int offset, int length ) throws E
{ // no-op
}
@Override
public void beginArray( int size, ArrayType arrayType ) throws E
{ // no-op
}
@Override
public void endArray() throws E
{ // no-opa
}
@Override
public void writeByteArray( byte[] value ) throws E
{ // no-op
}
}
}