| /* |
| * 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; |
| |
| public class Dependency { |
| final Expr mDependant; |
| final Expr mOther; |
| final Expr mCondition; |
| final boolean mExpectedOutput;// ! |
| // set only if this is conditional. Means it has been resolved so that it can be used in |
| // should get calculations |
| boolean mElevated; |
| |
| // this means that trying to calculate the dependant expression w/o |
| // will crash the app unless "Other" has a non-null value |
| boolean mMandatory = false; |
| |
| public Dependency(Expr dependant, Expr other) { |
| mDependant = dependant; |
| mOther = other; |
| mCondition = null; |
| mOther.addDependant(this); |
| mExpectedOutput = false; |
| } |
| |
| public Dependency(Expr dependant, Expr other, Expr condition, boolean expectedOutput) { |
| mDependant = dependant; |
| mOther = other; |
| mCondition = condition; |
| mOther.addDependant(this); |
| mExpectedOutput = expectedOutput; |
| } |
| |
| public void setMandatory(boolean mandatory) { |
| mMandatory = mandatory; |
| } |
| |
| public boolean isMandatory() { |
| return mMandatory; |
| } |
| |
| public boolean isConditional() { |
| return mCondition != null && !mElevated; |
| } |
| |
| public Expr getOther() { |
| return mOther; |
| } |
| |
| public Expr getDependant() { |
| return mDependant; |
| } |
| |
| public boolean getExpectedOutput() { |
| return mExpectedOutput; |
| } |
| |
| public Expr getCondition() { |
| return mCondition; |
| } |
| |
| public void elevate() { |
| mElevated = true; |
| } |
| |
| public boolean isElevated() { |
| return mElevated; |
| } |
| } |