1 /* 2 * Copyright (C) 2015 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package android.databinding.tool.expr; 18 19 import android.databinding.tool.reflection.ModelAnalyzer; 20 import android.databinding.tool.reflection.ModelClass; 21 import android.databinding.tool.writer.KCode; 22 23 import java.util.List; 24 25 public class InstanceOfExpr extends Expr { 26 final String mTypeStr; 27 ModelClass mType; 28 29 InstanceOfExpr(Expr left, String type) { 30 super(left); 31 mTypeStr = type; 32 } 33 34 @Override 35 protected String computeUniqueKey() { 36 return join("instanceof", super.computeUniqueKey(), mTypeStr); 37 } 38 39 @Override 40 protected KCode generateCode() { 41 return new KCode() 42 .app("", getExpr().toCode()) 43 .app(" instanceof ") 44 .app(getType().toJavaCode()); 45 } 46 47 @Override 48 public Expr cloneToModel(ExprModel model) { 49 return model.instanceOfOp(getExpr().cloneToModel(model), mTypeStr); 50 } 51 52 @Override 53 protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { 54 mType = modelAnalyzer.findClass(mTypeStr, getModel().getImports()); 55 return modelAnalyzer.loadPrimitive("boolean"); 56 } 57 58 @Override 59 protected List<Dependency> constructDependencies() { 60 return constructDynamicChildrenDependencies(); 61 } 62 63 public Expr getExpr() { 64 return getChildren().get(0); 65 } 66 67 public ModelClass getType() { 68 return mType; 69 } 70 71 @Override 72 public String getInvertibleError() { 73 return "two-way binding can't target a value with the 'instanceof' operator"; 74 } 75 76 @Override 77 public String toString() { 78 return getExpr().toString() + " instanceof " + mTypeStr; 79 } 80 } 81