/*
* Copyright 2003-2014 JetBrains s.r.o.
*
* 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 jetbrains.mps.persistence;
import jetbrains.mps.extapi.model.SModelData;
import jetbrains.mps.smodel.adapter.ids.SConceptId;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.mps.openapi.model.SModelReference;
import org.jetbrains.mps.openapi.model.SNodeId;
import org.jetbrains.mps.openapi.persistence.ModelFactory;
import java.io.IOException;
import java.io.InputStream;
/**
* PROVISIONAL API
*
* Extension to model factory to distinguish model persistence that cares about (usually platform) indexing support and knows ho to extract
* appropriate pieces from actual model persistence state.
*
* @author Artem Tikhomirov
* @author danilla
*/
public interface IndexAwareModelFactory extends ModelFactory {
/**
* Captures references to concepts/nodes/model from a model. API might change if we find certain parameters ineffective
* (e.g. excessive translation or more information is needed).
*
* Preferably, works faster than regular model read.
*/
void index(@NotNull InputStream input, @NotNull Callback callback) throws IOException;
/**
* Return either all or part of model data contained in the given input stream for the purpose of indexing.
* For multiple file model formats it will be a subset of all model data.
*
* The return type may change to a more general {code}ModelFragment{code} of which
* {@link SModelData} will be a special case, applicable in situations when persistence is able
* to return not only (a subset of) root nodes but also a model reference from the single stream given.
*
* @param name Name of the stream, to help model factory decide which part of data source it is.
* @param input An input stream which is a part of a data source accepted by this model factory
* @return (A subset of) model data contained in the given input stream
*
* @see org.jetbrains.mps.openapi.persistence.MultiStreamDataSource
*/
SModelData parseSingleStream(@NotNull String name, @NotNull InputStream input) throws IOException;
/**
* Callback implementation shall tolerate duplicated notifications
*/
interface Callback {
/**
* Report indexed model has instances of the concept specified
*/
void instances(@NotNull SConceptId concept);
/**
* Report indexed model imports some other model
*/
void imports(@NotNull SModelReference modelRef);
/**
* Report indexed model references node with a given id from some external model
*/
void externalNodeRef(@NotNull SNodeId node);
/**
* Report indexed model references node with a given id that resides in the indexed model
*/
void localNodeRef(@NotNull SNodeId node);
}
}