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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.reflection.ModelAnalyzer;
import android.databinding.tool.reflection.ModelClass;
import android.databinding.tool.writer.KCode;
import java.util.List;
/**
* This is a special expression that is created when we have an adapter that has multiple
* parameters.
* <p>
* When it is detected, we create a new binding with this argument list expression and merge N
* bindings into a new one so that rest of the code generation logic works as expected.
*/
public class ArgListExpr extends Expr {
private int mId;
public ArgListExpr(int id, Iterable<Expr> children) {
super(children);
mId = id;
}
@Override
protected String computeUniqueKey() {
return "ArgList[" + mId + "]" + super.computeUniqueKey();
}
@Override
protected KCode generateCode() {
throw new IllegalStateException("should never try to convert an argument expressions"
+ " into code");
}
@Override
public Expr cloneToModel(ExprModel model) {
return model.argListExpr(cloneToModel(model, getChildren()));
}
@Override
protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) {
return modelAnalyzer.findClass(Void.class);
}
@Override
protected List<Dependency> constructDependencies() {
return super.constructDynamicChildrenDependencies();
}
@Override
public boolean canBeEvaluatedToAVariable() {
return false;
}
@Override
public String getInvertibleError() {
return "Merged bindings are not invertible.";
}
}
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