BaseFactBuilder.java

/*
 * Copyright 2015 Red Hat, Inc. and/or its affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * 
 *      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.kie.workbench.common.services.datamodel.backend.server.builder.projects;

import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.drools.workbench.models.commons.backend.oracle.ProjectDataModelOracleImpl;
import org.drools.workbench.models.datamodel.oracle.DataType;
import org.drools.workbench.models.datamodel.oracle.FieldAccessorsAndMutators;
import org.drools.workbench.models.datamodel.oracle.ModelField;
import org.drools.workbench.models.datamodel.oracle.TypeSource;

/**
 * Base FactBuilder containing common code
 */
public abstract class BaseFactBuilder implements FactBuilder {

    protected final ProjectDataModelOracleBuilder builder;

    private final String type;
    private final List<ModelField> fields = new ArrayList<ModelField>();

    private final boolean isCollection;
    private final boolean isEvent;
    protected final TypeSource typeSource;

    public BaseFactBuilder( final ProjectDataModelOracleBuilder builder,
                            final Class<?> clazz,
                            final boolean isEvent,
                            final TypeSource typeSource ) {
        this.builder = builder;
        this.type = getFullClassName( clazz );
        this.isCollection = isCollection( clazz );
        this.isEvent = isEvent;
        this.typeSource = typeSource;

        addField( new ModelField( DataType.TYPE_THIS,
                                  type,
                                  ModelField.FIELD_CLASS_TYPE.REGULAR_CLASS,
                                  ModelField.FIELD_ORIGIN.SELF,
                                  FieldAccessorsAndMutators.ACCESSOR,
                                  DataType.TYPE_THIS ) );
    }

    public BaseFactBuilder( final ProjectDataModelOracleBuilder builder,
                            final String type,
                            final boolean isCollection,
                            final boolean isEvent,
                            final TypeSource typeSource ) {
        this.builder = builder;
        this.type = type;
        this.isCollection = isCollection;
        this.isEvent = isEvent;
        this.typeSource = typeSource;

        addField( new ModelField( DataType.TYPE_THIS,
                                  type,
                                  ModelField.FIELD_CLASS_TYPE.REGULAR_CLASS,
                                  ModelField.FIELD_ORIGIN.SELF,
                                  FieldAccessorsAndMutators.ACCESSOR,
                                  DataType.TYPE_THIS ) );
    }

    private boolean isCollection( final Class<?> clazz ) {
        return ( clazz != null && Collection.class.isAssignableFrom( clazz ) );
    }

    private String getFullClassName( final Class<?> clazz ) {
        return clazz.getName();
    }

    public String getType() {
        return type;
    }

    protected FactBuilder addField( final ModelField field ) {
        this.fields.add( field );
        return this;
    }

    @Override
    public ProjectDataModelOracleBuilder end() {
        return builder;
    }

    @Override
    public void build( final ProjectDataModelOracleImpl oracle ) {
        oracle.addProjectModelFields( buildModelFields() );
        oracle.addProjectCollectionTypes( buildCollectionTypes() );
        oracle.addProjectEventTypes( buildEventTypes() );
        oracle.addProjectTypeSources( buildTypeSources() );
    }

    public ProjectDataModelOracleBuilder getDataModelBuilder() {
        return this.builder;
    }

    private Map<String, ModelField[]> buildModelFields() {
        final Map<String, ModelField[]> loadableFactsAndFields = new HashMap<String, ModelField[]>();
        final ModelField[] loadableFields = new ModelField[ fields.size() ];
        fields.toArray( loadableFields );
        loadableFactsAndFields.put( type,
                                    loadableFields );
        return loadableFactsAndFields;
    }

    private Map<String, Boolean> buildCollectionTypes() {
        final Map<String, Boolean> loadableCollectionTypes = new HashMap<String, Boolean>();
        loadableCollectionTypes.put( type,
                                     isCollection );
        return loadableCollectionTypes;
    }

    private Map<String, Boolean> buildEventTypes() {
        final Map<String, Boolean> loadableEventTypes = new HashMap<String, Boolean>();
        loadableEventTypes.put( type,
                                isEvent );
        return loadableEventTypes;
    }

    private Map<String, TypeSource> buildTypeSources() {
        final Map<String, TypeSource> loadableTypeSources = new HashMap<String, TypeSource>();
        loadableTypeSources.put( type,
                                 typeSource );
        return loadableTypeSources;
    }

}