manifold.tuple.TupleTypeProvider Maven / Gradle / Ivy
/*
* Copyright (c) 2022 - Manifold Systems LLC
*
* 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 manifold.tuple;
import manifold.api.util.fingerprint.Fingerprint;
import manifold.internal.javac.ITupleTypeProvider;
import java.util.*;
import java.util.concurrent.ConcurrentHashMap;
public class TupleTypeProvider implements ITupleTypeProvider
{
static String BASE_NAME = "manifold_tuple_";
private final Map> _nameToFields;
private final Map _fingerprints;
public TupleTypeProvider()
{
_nameToFields = new LinkedHashMap<>();
_fingerprints = new ConcurrentHashMap<>();
}
@Override
public String makeType( String pkg, Map fieldNameToTypeName )
{
Map alphaOrder = new LinkedHashMap<>();
fieldNameToTypeName.keySet().stream()
.sorted( Comparator.naturalOrder() )
.forEach( e -> alphaOrder.put( e, fieldNameToTypeName.get( e ) ) );
String fqn = makeName( pkg, alphaOrder );
_nameToFields.putIfAbsent( fqn, alphaOrder );
return fqn;
}
public Set getTypes()
{
return _nameToFields.keySet();
}
@Override
public Map getFields( String fqn )
{
return _nameToFields.get( fqn );
}
private String makeName( String pkg, Map alphaOrder )
{
StringBuilder sb = new StringBuilder();
alphaOrder.forEach( (a, b) -> sb.append( a ).append( b ) );
String fingerprint = _fingerprints.computeIfAbsent( sb.toString(), str -> {
long rawFingerprint = new Fingerprint( str ).getRawFingerprint();
String fp = String.valueOf( rawFingerprint );
return fp.charAt( 0 ) == '-' ? '_' + fp.substring( 1 ) : fp;
} );
return pkg + '.' + BASE_NAME + fingerprint;
}
}