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(boolean expand) { 41 return new KCode() 42 .app("", getExpr().toCode(expand)) 43 .app(" instanceof ") 44 .app(getType().toJavaCode()); 45 } 46 47 @Override 48 protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { 49 mType = modelAnalyzer.findClass(mTypeStr, getModel().getImports()); 50 return modelAnalyzer.loadPrimitive("boolean"); 51 } 52 53 @Override 54 protected List<Dependency> constructDependencies() { 55 return constructDynamicChildrenDependencies(); 56 } 57 58 public Expr getExpr() { 59 return getChildren().get(0); 60 } 61 62 public ModelClass getType() { 63 return mType; 64 } 65 66 @Override 67 public String getInvertibleError() { 68 return "two-way binding can't target a value with the 'instanceof' operator"; 69 } 70 } 71
