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RulesJvmModelInferrer.xtend
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RulesJvmModelInferrer.xtend
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/**
* Copyright (c) 2010-2020 Contributors to the openHAB project
*
* See the NOTICE file(s) distributed with this work for additional
* information.
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Public License 2.0 which is available at
* http://www.eclipse.org/legal/epl-2.0
*
* SPDX-License-Identifier: EPL-2.0
*/
package org.openhab.core.model.rule.jvmmodel
import com.google.inject.Inject
import java.util.Set
import org.openhab.core.items.Item
import org.openhab.core.items.ItemRegistry
import org.openhab.core.thing.ThingRegistry
import org.openhab.core.thing.events.ChannelTriggeredEvent
import org.openhab.core.types.Command
import org.openhab.core.types.State
import org.openhab.core.model.rule.rules.ChangedEventTrigger
import org.openhab.core.model.rule.rules.CommandEventTrigger
import org.openhab.core.model.rule.rules.EventEmittedTrigger
import org.openhab.core.model.rule.rules.EventTrigger
import org.openhab.core.model.rule.rules.GroupMemberChangedEventTrigger
import org.openhab.core.model.rule.rules.GroupMemberCommandEventTrigger
import org.openhab.core.model.rule.rules.GroupMemberUpdateEventTrigger
import org.openhab.core.model.rule.rules.Rule
import org.openhab.core.model.rule.rules.RuleModel
import org.openhab.core.model.rule.rules.ThingStateChangedEventTrigger
import org.openhab.core.model.rule.rules.UpdateEventTrigger
import org.openhab.core.model.script.jvmmodel.ScriptJvmModelInferrer
import org.openhab.core.model.script.scoping.StateAndCommandProvider
import org.eclipse.xtext.naming.IQualifiedNameProvider
import org.eclipse.xtext.xbase.jvmmodel.IJvmDeclaredTypeAcceptor
import org.eclipse.xtext.xbase.jvmmodel.JvmTypesBuilder
import org.slf4j.Logger
import org.slf4j.LoggerFactory
import org.eclipse.xtext.common.types.JvmFormalParameter
import org.eclipse.emf.common.util.EList
import org.openhab.core.events.Event
/**
* <p>Infers a JVM model from the source model.</p>
*
* <p>The JVM model should contain all elements that would appear in the Java code
* which is generated from the source model. Other models link against the JVM model rather than the source model.</p>
*
* @author Oliver Libutzki - Xtext 2.5.0 migration
*
*/
class RulesJvmModelInferrer extends ScriptJvmModelInferrer {
private final Logger logger = LoggerFactory.getLogger(RulesJvmModelInferrer)
/**
* conveninence API to build and initialize JvmTypes and their members.
*/
@Inject extension JvmTypesBuilder
@Inject extension IQualifiedNameProvider
@Inject
ItemRegistry itemRegistry
@Inject
ThingRegistry thingRegistry
@Inject
StateAndCommandProvider stateAndCommandProvider
/**
* Is called for each instance of the first argument's type contained in a resource.
*
* @param element - the model to create one or more JvmDeclaredTypes from.
* @param acceptor - each created JvmDeclaredType without a container should be passed to the acceptor in order get attached to the
* current resource.
* @param isPreLinkingPhase - whether the method is called in a pre linking phase, i.e. when the global index isn't fully updated. You
* must not rely on linking using the index if iPrelinkingPhase is <code>true</code>
*/
def dispatch void infer(RuleModel ruleModel, IJvmDeclaredTypeAcceptor acceptor, boolean isPreIndexingPhase) {
val className = ruleModel.eResource.URI.lastSegment.split("\\.").head.toFirstUpper + "Rules"
acceptor.accept(ruleModel.toClass(className)).initializeLater [
members += ruleModel.variables.map [
toField(name, type?.cloneWithProxies) => [ field |
field.static = true
field.final = !writeable
field.initializer = right
]
]
val Set<String> fieldNames = newHashSet()
val types = stateAndCommandProvider.allTypes
types.forEach [ type |
val name = type.toString
if (fieldNames.add(name)) {
members += ruleModel.toField(name, ruleModel.newTypeRef(type.class)) [
static = true
]
} else {
logger.warn("Duplicate field: '{}'. Ignoring '{}'.", name, type.class.name)
}
]
itemRegistry?.items?.forEach [ item |
val name = item.name
if (fieldNames.add(name)) {
members += ruleModel.toField(item.name, ruleModel.newTypeRef(item.class)) [
static = true
]
} else {
logger.warn("Duplicate field: '{}'. Ignoring '{}'.", item.name, item.class.name)
}
]
val things = thingRegistry?.getAll()
things?.forEach [ thing |
val name = thing.getUID().toString()
if (fieldNames.add(name)) {
members += ruleModel.toField(name, ruleModel.newTypeRef(thing.class)) [
static = true
]
} else {
logger.warn("Duplicate field: '{}'. Ignoring '{}'.", name, thing.class.name)
}
]
members += ruleModel.rules.map [ rule |
rule.toMethod("_" + rule.name, ruleModel.newTypeRef(Void.TYPE)) [
static = true
if ((containsCommandTrigger(rule)) || (containsStateChangeTrigger(rule)) || (containsStateUpdateTrigger(rule))) {
val itemTypeRef = ruleModel.newTypeRef(Item)
parameters += rule.toParameter(VAR_TRIGGERING_ITEM, itemTypeRef)
val itemNameRef = ruleModel.newTypeRef(String)
parameters += rule.toParameter(VAR_TRIGGERING_ITEM_NAME, itemNameRef)
}
if (containsCommandTrigger(rule)) {
val commandTypeRef = ruleModel.newTypeRef(Command)
parameters += rule.toParameter(VAR_RECEIVED_COMMAND, commandTypeRef)
}
if (containsStateChangeTrigger(rule) && !containsParam(parameters, VAR_PREVIOUS_STATE)) {
val stateTypeRef = ruleModel.newTypeRef(State)
parameters += rule.toParameter(VAR_PREVIOUS_STATE, stateTypeRef)
}
if (containsEventTrigger(rule)) {
val eventTypeRef = ruleModel.newTypeRef(String)
parameters += rule.toParameter(VAR_RECEIVED_EVENT, eventTypeRef)
}
if (containsThingStateChangedEventTrigger(rule) && !containsParam(parameters, VAR_PREVIOUS_STATE)) {
val stateTypeRef = ruleModel.newTypeRef(State)
parameters += rule.toParameter(VAR_PREVIOUS_STATE, stateTypeRef)
}
if ((containsStateChangeTrigger(rule) || containsStateUpdateTrigger(rule)) && !containsParam(parameters, VAR_NEW_STATE)) {
val stateTypeRef = ruleModel.newTypeRef(State)
parameters += rule.toParameter(VAR_NEW_STATE, stateTypeRef)
}
body = rule.script
]
]
]
}
def private boolean containsParam(EList<JvmFormalParameter> params, String param) {
return params.map[name].contains(param);
}
def private boolean containsCommandTrigger(Rule rule) {
for (EventTrigger trigger : rule.getEventtrigger()) {
if (trigger instanceof CommandEventTrigger) {
return true;
}
if (trigger instanceof GroupMemberCommandEventTrigger) {
return true;
}
}
return false;
}
def private boolean containsStateChangeTrigger(Rule rule) {
for (EventTrigger trigger : rule.getEventtrigger()) {
if (trigger instanceof ChangedEventTrigger) {
return true;
}
if (trigger instanceof GroupMemberChangedEventTrigger) {
return true;
}
}
return false;
}
def private boolean containsStateUpdateTrigger(Rule rule) {
for (EventTrigger trigger : rule.getEventtrigger()) {
if (trigger instanceof UpdateEventTrigger) {
return true;
}
if (trigger instanceof GroupMemberUpdateEventTrigger) {
return true;
}
}
return false;
}
def private boolean containsEventTrigger(Rule rule) {
for (EventTrigger trigger : rule.getEventtrigger()) {
if (trigger instanceof EventEmittedTrigger) {
return true;
}
}
return false;
}
def private boolean containsThingStateChangedEventTrigger(Rule rule) {
for (EventTrigger trigger : rule.getEventtrigger()) {
if (trigger instanceof ThingStateChangedEventTrigger) {
return true;
}
}
return false;
}
}