| /* |
| * Copyright (C) 2015 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.Callable; |
| import android.databinding.tool.reflection.Callable.Type; |
| 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 android.databinding.tool.util.L; |
| import android.databinding.tool.writer.KCode; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import static android.databinding.tool.reflection.Callable.DYNAMIC; |
| import static android.databinding.tool.reflection.Callable.STATIC; |
| |
| |
| public class MethodCallExpr extends Expr { |
| final String mName; |
| Callable mGetter; |
| // Allow protected calls -- only used for ViewDataBinding methods. |
| private boolean mAllowProtected; |
| |
| static List<Expr> concat(Expr e, List<Expr> list) { |
| List<Expr> merged = new ArrayList<Expr>(); |
| merged.add(e); |
| merged.addAll(list); |
| return merged; |
| } |
| |
| MethodCallExpr(Expr target, String name, List<Expr> args) { |
| super(concat(target, args)); |
| mName = name; |
| } |
| |
| @SuppressWarnings("Duplicates") |
| @Override |
| public void updateExpr(ModelAnalyzer modelAnalyzer) { |
| try { |
| Scope.enter(this); |
| resolveType(modelAnalyzer); |
| super.updateExpr(modelAnalyzer); |
| } finally { |
| Scope.exit(); |
| } |
| } |
| |
| @Override |
| protected KCode generateCode() { |
| KCode code = new KCode() |
| .app("", getTarget().toCode()) |
| .app(".") |
| .app(getGetter().name) |
| .app("("); |
| appendArgs(code); |
| code.app(")"); |
| return code; |
| } |
| |
| @Override |
| public Expr cloneToModel(ExprModel model) { |
| return model.methodCall(getTarget().cloneToModel(model), mName, |
| cloneToModel(model, getArgs())); |
| } |
| |
| private void appendArgs(KCode code) { |
| boolean first = true; |
| for (Expr arg : getArgs()) { |
| if (first) { |
| first = false; |
| } else { |
| code.app(", "); |
| } |
| code.app("", arg.toCode()); |
| } |
| } |
| |
| @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, getArgs())); |
| } else { |
| for (ExecutionPath path : targetPaths) { |
| Expr cmp = getModel() |
| .comparison("!=", getTarget(), getModel().symbol("null", Object.class)); |
| path.addPath(cmp); |
| final ExecutionPath subPath = path.addBranch(cmp, true); |
| if (subPath != null) { |
| result.addAll(toExecutionPathInOrder(subPath, getArgs())); |
| } |
| } |
| } |
| return result; |
| } |
| |
| private List<ExecutionPath> toExecutionPathInOrder(ExecutionPath path, List<Expr> args) { |
| return toExecutionPathInOrder(Arrays.asList(path), args); |
| } |
| |
| @Override |
| protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { |
| if (mGetter == null) { |
| List<ModelClass> args = new ArrayList<ModelClass>(); |
| for (Expr expr : getArgs()) { |
| args.add(expr.getResolvedType()); |
| } |
| |
| Expr target = getTarget(); |
| boolean isStatic = target instanceof StaticIdentifierExpr; |
| ModelMethod method = target.getResolvedType().getMethod(mName, args, isStatic, |
| mAllowProtected); |
| if (method == null) { |
| StringBuilder argTypes = new StringBuilder(); |
| for (ModelClass arg : args) { |
| if (argTypes.length() != 0) { |
| argTypes.append(", "); |
| } |
| argTypes.append(arg.toJavaCode()); |
| } |
| String message = "cannot find method '" + mName + "(" + argTypes + ")' in class " + |
| target.getResolvedType().toJavaCode(); |
| IllegalArgumentException e = new IllegalArgumentException(message); |
| L.e(e, "cannot find method %s(%s) in class %s", mName, argTypes, |
| target.getResolvedType().toJavaCode()); |
| throw e; |
| } |
| if (!isStatic && method.isStatic()) { |
| // found a static method on an instance. Use class instead |
| target.getParents().remove(this); |
| getChildren().remove(target); |
| StaticIdentifierExpr staticId = getModel() |
| .staticIdentifierFor(target.getResolvedType()); |
| getChildren().add(staticId); |
| staticId.getParents().add(this); |
| // make sure we update this in case we access it below |
| target = getTarget(); |
| } |
| int flags = DYNAMIC; |
| if (method.isStatic()) { |
| flags |= STATIC; |
| } |
| mGetter = new Callable(Type.METHOD, method.getName(), null, method.getReturnType(args), |
| method.getParameterTypes().length, flags, method); |
| } |
| return mGetter.resolvedType; |
| } |
| |
| @Override |
| protected List<Dependency> constructDependencies() { |
| final List<Dependency> dependencies = constructDynamicChildrenDependencies(); |
| for (Dependency dependency : dependencies) { |
| if (dependency.getOther() == getTarget()) { |
| dependency.setMandatory(true); |
| } |
| } |
| return dependencies; |
| } |
| |
| @Override |
| protected String computeUniqueKey() { |
| return join(getTarget().computeUniqueKey(), mName, |
| super.computeUniqueKey()); |
| } |
| |
| public Expr getTarget() { |
| return getChildren().get(0); |
| } |
| |
| public String getName() { |
| return mName; |
| } |
| |
| public List<Expr> getArgs() { |
| return getChildren().subList(1, getChildren().size()); |
| } |
| |
| public Callable getGetter() { |
| return mGetter; |
| } |
| |
| public void setAllowProtected() { |
| mAllowProtected = true; |
| } |
| |
| @Override |
| public String getInvertibleError() { |
| return "Method calls may not be used in two-way expressions"; |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder buf = new StringBuilder(); |
| buf.append(getTarget()) |
| .append('.') |
| .append(mName) |
| .append('('); |
| final List<Expr> args = getArgs(); |
| for (int i = 0; i < args.size(); i++) { |
| Expr arg = args.get(i); |
| if (i != 0) { |
| buf.append(", "); |
| } |
| buf.append(arg); |
| } |
| buf.append(')'); |
| return buf.toString(); |
| } |
| } |