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 17package android.databinding.tool.expr; 18 19import android.databinding.tool.reflection.ModelAnalyzer; 20import android.databinding.tool.reflection.ModelClass; 21import android.databinding.tool.writer.KCode; 22 23import java.util.List; 24 25public class ComparisonExpr extends Expr { 26 final String mOp; 27 ComparisonExpr(String op, Expr left, Expr right) { 28 super(left, right); 29 mOp = op; 30 } 31 32 @Override 33 protected String computeUniqueKey() { 34 return join(mOp, super.computeUniqueKey()); 35 } 36 37 @Override 38 protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { 39 return modelAnalyzer.loadPrimitive("boolean"); 40 } 41 42 @Override 43 protected List<Dependency> constructDependencies() { 44 return constructDynamicChildrenDependencies(); 45 } 46 47 public String getOp() { 48 return mOp; 49 } 50 51 public Expr getLeft() { 52 return getChildren().get(0); 53 } 54 55 public Expr getRight() { 56 return getChildren().get(1); 57 } 58 59 @Override 60 public boolean isEqualityCheck() { 61 return "==".equals(mOp.trim()); 62 } 63 64 @Override 65 protected KCode generateCode(boolean expand) { 66 return new KCode().app("", getLeft().toCode(expand)) 67 .app(" ").app(getOp()).app(" ") 68 .app("", getRight().toCode(expand)); 69 } 70 71 @Override 72 public String getInvertibleError() { 73 return "Comparison operators are not valid as targets of two-way binding"; 74 } 75} 76