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 UnaryExpr extends Expr { 26 final String mOp; 27 UnaryExpr(String op, Expr expr) { 28 super(expr); 29 mOp = op; 30 } 31 32 @Override 33 public String getInvertibleError() { 34 return getExpr().getInvertibleError(); 35 } 36 37 @Override 38 protected String computeUniqueKey() { 39 return addTwoWay(join(getOpStr(), getExpr().getUniqueKey())); 40 } 41 42 @Override 43 public KCode toInverseCode(KCode value) { 44 return getExpr().toInverseCode(new KCode().app(mOp, value)); 45 } 46 47 @Override 48 protected KCode generateCode(boolean expand) { 49 return new KCode().app(getOp(), getExpr().toCode(expand)); 50 } 51 52 @Override 53 protected ModelClass resolveType(ModelAnalyzer modelAnalyzer) { 54 return getExpr().getResolvedType(); 55 } 56 57 @Override 58 protected List<Dependency> constructDependencies() { 59 return constructDynamicChildrenDependencies(); 60 } 61 62 private String getOpStr() { 63 switch (mOp.charAt(0)) { 64 case '~' : return "bitNot"; 65 case '!' : return "logicalNot"; 66 case '-' : return "unaryMinus"; 67 case '+' : return "unaryPlus"; 68 } 69 return mOp; 70 } 71 72 public String getOp() { 73 return mOp; 74 } 75 76 public Expr getExpr() { 77 return getChildren().get(0); 78 } 79} 80