FieldInspector.java

/*
 * Copyright 2016 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.
 * 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.drools.workbench.services.verifier.core.cache.inspectors;

import java.util.Collection;

import org.drools.workbench.services.verifier.api.client.configuration.AnalyzerConfiguration;
import org.drools.workbench.services.verifier.api.client.index.Action;
import org.drools.workbench.services.verifier.api.client.index.Condition;
import org.drools.workbench.services.verifier.api.client.index.Field;
import org.drools.workbench.services.verifier.api.client.index.ObjectField;
import org.drools.workbench.services.verifier.api.client.index.keys.Key;
import org.drools.workbench.services.verifier.api.client.index.keys.UUIDKey;
import org.drools.workbench.services.verifier.api.client.index.select.AllListener;
import org.drools.workbench.services.verifier.api.client.maps.InspectorList;
import org.drools.workbench.services.verifier.api.client.maps.UpdatableInspectorList;
import org.drools.workbench.services.verifier.api.client.maps.util.HasConflicts;
import org.drools.workbench.services.verifier.api.client.maps.util.HasKeys;
import org.drools.workbench.services.verifier.api.client.relations.Conflict;
import org.drools.workbench.services.verifier.api.client.relations.HumanReadable;
import org.drools.workbench.services.verifier.api.client.relations.IsConflicting;
import org.drools.workbench.services.verifier.api.client.relations.IsRedundant;
import org.drools.workbench.services.verifier.api.client.relations.IsSubsuming;
import org.uberfire.commons.validation.PortablePreconditions;
import org.drools.workbench.services.verifier.core.cache.inspectors.action.ActionInspector;
import org.drools.workbench.services.verifier.core.cache.inspectors.action.ActionInspectorFactory;
import org.drools.workbench.services.verifier.core.cache.inspectors.condition.ConditionInspector;
import org.drools.workbench.services.verifier.core.cache.inspectors.condition.ConditionInspectorFactory;

public class FieldInspector
        implements HasConflicts,
                   IsConflicting,
                   IsSubsuming,
                   IsRedundant,
                   HumanReadable,
                   HasKeys {

    private final ObjectField objectField;

    private final UpdatableInspectorList<ActionInspector, Action> actionInspectorList;
    private final UpdatableInspectorList<ConditionInspector, Condition> conditionInspectorList;
    private final UUIDKey uuidKey;
    private final RuleInspectorUpdater ruleInspectorUpdater;

    public FieldInspector( final Field field,
                           final RuleInspectorUpdater ruleInspectorUpdater,
                           final AnalyzerConfiguration configuration ) {
        this( field.getObjectField(),
              ruleInspectorUpdater,
              configuration );

        configuration.getUUID( this );

        updateActionInspectors( field.getActions()
                                        .where( Action.value()
                                                        .any() )
                                        .select()
                                        .all() );
        updateConditionInspectors( field.getConditions()
                                           .where( Condition.value()
                                                           .any() )
                                           .select()
                                           .all() );

        setupActionsListener( field );
        setupConditionsListener( field );
    }

    public FieldInspector( final ObjectField field,
                           final RuleInspectorUpdater ruleInspectorUpdater,
                           final AnalyzerConfiguration configuration ) {
        this.objectField = PortablePreconditions.checkNotNull( "field",
                                                               field );
        this.ruleInspectorUpdater = PortablePreconditions.checkNotNull( "ruleInspectorUpdater",
                                                                        ruleInspectorUpdater );

        uuidKey = configuration.getUUID( this );

        actionInspectorList = new UpdatableInspectorList<>( new ActionInspectorFactory( configuration ),
                                                            configuration );
        conditionInspectorList = new UpdatableInspectorList<>( new ConditionInspectorFactory( configuration ),
                                                               configuration );
    }

    private void setupConditionsListener( final Field field ) {
        field.getConditions()
                .where( Condition.value()
                                .any() )
                .listen()
                .all( new AllListener<Condition>() {
                    @Override
                    public void onAllChanged( final Collection<Condition> all ) {
                        updateConditionInspectors( all );
                        ruleInspectorUpdater.resetConditionsInspectors();
                    }
                } );
    }

    private void setupActionsListener( final Field field ) {
        field.getActions()
                .where( Action.value()
                                .any() )
                .listen()
                .all( new AllListener<Action>() {
                    @Override
                    public void onAllChanged( final Collection<Action> all ) {
                        updateActionInspectors( all );
                        ruleInspectorUpdater.resetActionsInspectors();
                    }
                } );
    }

    public ObjectField getObjectField() {
        return objectField;
    }

    private void updateConditionInspectors( final Collection<Condition> all ) {
        conditionInspectorList.update( all );
    }

    private void updateActionInspectors( final Collection<Action> all ) {
        actionInspectorList.update( all );
    }

    public InspectorList<ActionInspector> getActionInspectorList() {
        return actionInspectorList;
    }

    public InspectorList<ConditionInspector> getConditionInspectorList() {
        return conditionInspectorList;
    }

    @Override
    public Conflict hasConflicts() {
        int index = 1;
        for ( final ConditionInspector conditionInspector : conditionInspectorList ) {
            for ( int j = index; j < conditionInspectorList.size(); j++ ) {
                if ( conditionInspector.conflicts( conditionInspectorList.get( j ) ) ) {
                    return new Conflict( conditionInspector,
                                         conditionInspectorList.get( j ) );
                }
            }
            index++;
        }
        return Conflict.EMPTY;
    }

    @Override
    public boolean conflicts( final Object other ) {
        if ( other instanceof FieldInspector && objectField.equals( ( (FieldInspector) other ).objectField ) ) {

            final boolean conflicting = actionInspectorList.conflicts( ( (FieldInspector) other ).actionInspectorList );
            if ( conflicting ) {
                return true;
            } else {
                return conditionInspectorList.conflicts( ( (FieldInspector) other ).conditionInspectorList );
            }
        } else {
            return false;
        }
    }

    @Override
    public boolean isRedundant( final Object other ) {
        if ( other instanceof FieldInspector && objectField.equals( ( (FieldInspector) other ).objectField ) ) {
            return actionInspectorList.isRedundant( ( (FieldInspector) other ).actionInspectorList )
                    && conditionInspectorList.isRedundant( ( (FieldInspector) other ).conditionInspectorList );
        } else {
            return false;
        }
    }

    @Override
    public boolean subsumes( final Object other ) {
        if ( other instanceof FieldInspector && objectField.equals( ( (FieldInspector) other ).objectField ) ) {
            return actionInspectorList.subsumes( ( (FieldInspector) other ).actionInspectorList )
                    && conditionInspectorList.subsumes( ( (FieldInspector) other ).conditionInspectorList );

        } else {
            return false;
        }
    }

    @Override
    public String toHumanReadableString() {
        return objectField.getName();
    }

    @Override
    public UUIDKey getUuidKey() {
        return uuidKey;
    }

    @Override
    public Key[] keys() {
        return new Key[]{
                uuidKey
        };
    }
}