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      1 /*
      2  * Copyright (C) 2010 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 com.android.ide.common.resources.configuration;
     18 
     19 import com.android.resources.ResourceEnum;
     20 
     21 /**
     22  * Base class for {@link ResourceQualifier} whose value is an {@link ResourceEnum}.
     23  *
     24  */
     25 abstract class EnumBasedResourceQualifier extends ResourceQualifier {
     26 
     27     abstract ResourceEnum getEnumValue();
     28 
     29     @Override
     30     public boolean isValid() {
     31         return getEnumValue() != null;
     32     }
     33 
     34     @Override
     35     public boolean hasFakeValue() {
     36         return getEnumValue().isFakeValue();
     37     }
     38 
     39     @Override
     40     public boolean equals(Object qualifier) {
     41         if (qualifier instanceof EnumBasedResourceQualifier) {
     42             return getEnumValue() == ((EnumBasedResourceQualifier)qualifier).getEnumValue();
     43         }
     44 
     45         return false;
     46     }
     47 
     48     @Override
     49     public int hashCode() {
     50         ResourceEnum value = getEnumValue();
     51         if (value != null) {
     52             return value.hashCode();
     53         }
     54 
     55         return 0;
     56     }
     57 
     58     /**
     59      * Returns the string used to represent this qualifier in the folder name.
     60      */
     61     @Override
     62     public final String getFolderSegment() {
     63         ResourceEnum value = getEnumValue();
     64         if (value != null) {
     65             return value.getResourceValue();
     66         }
     67 
     68         return ""; //$NON-NLS-1$
     69     }
     70 
     71 
     72     @Override
     73     public String getShortDisplayValue() {
     74         ResourceEnum value = getEnumValue();
     75         if (value != null) {
     76             return value.getShortDisplayValue();
     77         }
     78 
     79         return ""; //$NON-NLS-1$
     80     }
     81 
     82     @Override
     83     public String getLongDisplayValue() {
     84         ResourceEnum value = getEnumValue();
     85         if (value != null) {
     86             return value.getLongDisplayValue();
     87         }
     88 
     89         return ""; //$NON-NLS-1$
     90     }
     91 
     92 }
     93