| /* |
| * Copyright (C) 2016 The Android Open Source Project |
| * |
| * 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 android.databinding.tool.expr; |
| |
| import android.databinding.tool.processing.Scope; |
| import android.databinding.tool.reflection.ModelAnalyzer; |
| import android.databinding.tool.reflection.ModelClass; |
| import android.databinding.tool.reflection.ModelMethod; |
| import android.databinding.tool.solver.ExecutionPath; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public abstract class MethodBaseExpr extends Expr { |
| String mName; |
| |
| MethodBaseExpr(Expr parent, String name) { |
| super(parent); |
| mName = name; |
| } |
| |
| public Expr getTarget() { |
| return getChildren().get(0); |
| } |
| |
| @Override |
| public List<ExecutionPath> toExecutionPath(List<ExecutionPath> paths) { |
| final List<ExecutionPath> targetPaths = getTarget().toExecutionPath(paths); |
| // after this, we need a null check. |
| List<ExecutionPath> result = new ArrayList<ExecutionPath>(); |
| if (getTarget() instanceof StaticIdentifierExpr) { |
| result.addAll(toExecutionPathInOrder(paths, getTarget())); |
| } else { |
| for (ExecutionPath path : targetPaths) { |
| final ComparisonExpr cmp = getModel() |
| .comparison("!=", getTarget(), getModel().symbol("null", Object.class)); |
| path.addPath(cmp); |
| final ExecutionPath subPath = path.addBranch(cmp, true); |
| if (subPath != null) { |
| subPath.addPath(this); |
| result.add(subPath); |
| } |
| } |
| } |
| return result; |
| } |
| |
| protected Expr resolveListenersAsMethodReference(ModelClass listener, Expr parent) { |
| final Expr target = getTarget(); |
| final ModelClass childType = target.getResolvedType(); |
| if (listener == null) { |
| throw new IllegalStateException( |
| String.format("Could not resolve %s as a listener.", this)); |
| } |
| |
| List<ModelMethod> abstractMethods = listener.getAbstractMethods(); |
| int numberOfAbstractMethods = abstractMethods == null ? 0 : abstractMethods.size(); |
| if (numberOfAbstractMethods != 1) { |
| throw new IllegalStateException(String.format( |
| "Could not find accessor %s.%s and %s has %d abstract methods, so is" + |
| " not resolved as a listener", |
| childType.getCanonicalName(), mName, |
| listener.getCanonicalName(), numberOfAbstractMethods)); |
| } |
| |
| // Look for a signature matching the abstract method |
| final ModelMethod listenerMethod = abstractMethods.get(0); |
| final ModelClass[] listenerParameters = listenerMethod.getParameterTypes(); |
| boolean isStatic = getTarget() instanceof StaticIdentifierExpr; |
| List<ModelMethod> methods = childType.findMethods(mName, isStatic); |
| for (ModelMethod method : methods) { |
| if (acceptsParameters(method, listenerParameters) && |
| method.getReturnType(null).equals(listenerMethod.getReturnType(null))) { |
| target.getParents().remove(this); |
| resetResolvedType(); |
| // replace this with ListenerExpr in parent |
| Expr listenerExpr = getModel().listenerExpr(getTarget(), mName, listener, |
| listenerMethod); |
| if (parent != null) { |
| int index; |
| while ((index = parent.getChildren().indexOf(this)) != -1) { |
| parent.getChildren().set(index, listenerExpr); |
| } |
| } |
| if (getModel().mBindingExpressions.contains(this)) { |
| getModel().bindingExpr(listenerExpr); |
| } |
| getParents().remove(parent); |
| if (getParents().isEmpty()) { |
| getModel().removeExpr(this); |
| } |
| return listenerExpr; |
| } |
| } |
| |
| throw new IllegalStateException(String.format( |
| "Listener class %s with method %s did not match signature of any method %s", |
| listener.getCanonicalName(), listenerMethod.getName(), this)); |
| } |
| |
| private boolean acceptsParameters(ModelMethod method, ModelClass[] listenerParameters) { |
| ModelClass[] parameters = method.getParameterTypes(); |
| if (parameters.length != listenerParameters.length) { |
| return false; |
| } |
| for (int i = 0; i < parameters.length; i++) { |
| if (!parameters[i].isAssignableFrom(listenerParameters[i])) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| @Override |
| protected List<Dependency> constructDependencies() { |
| final List<Dependency> dependencies = constructDynamicChildrenDependencies(); |
| for (Dependency dependency : dependencies) { |
| if (dependency.getOther() == getTarget()) { |
| dependency.setMandatory(true); |
| } |
| } |
| return dependencies; |
| } |
| |
| public String getName() { |
| return mName; |
| } |
| |
| @Override |
| public void updateExpr(ModelAnalyzer modelAnalyzer) { |
| try { |
| Scope.enter(this); |
| resolveType(modelAnalyzer); |
| super.updateExpr(modelAnalyzer); |
| } finally { |
| Scope.exit(); |
| } |
| } |
| } |