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/*
* 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.util.L;
import android.databinding.tool.writer.KCode;
import java.util.ArrayList;
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;
static List<Expr> concat(Expr e, List<Expr> list) {
List<Expr> merged = new ArrayList<>();
merged.add(e);
merged.addAll(list);
return merged;
}
MethodCallExpr(Expr target, String name, List<Expr> args) {
super(concat(target, args));
mName = name;
}
@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("(");
boolean first = true;
for (Expr arg : getArgs()) {
if (first) {
first = false;
} else {
code.app(", ");
}
code.app("", arg.toCode());
}
code.app(")");
return code;
}
@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);
if (method == null) {
String message = "cannot find method '" + mName + "' in class " +
target.getResolvedType().toJavaCode();
IllegalArgumentException e = new IllegalArgumentException(message);
L.e(e, "cannot find method %s in class %s", mName,
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(), method.getReturnType(args), flags);
}
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;
}
}
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