diff options
Diffstat (limited to 'src/main/java/com/google/devtools/common')
3 files changed, 72 insertions, 8 deletions
diff --git a/src/main/java/com/google/devtools/common/options/BoolOrEnumConverter.java b/src/main/java/com/google/devtools/common/options/BoolOrEnumConverter.java new file mode 100644 index 0000000000..1a11ee8a18 --- /dev/null +++ b/src/main/java/com/google/devtools/common/options/BoolOrEnumConverter.java @@ -0,0 +1,62 @@ +// Copyright 2014 Google Inc. All rights reserved. +// +// 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 com.google.devtools.common.options; + +import com.google.devtools.common.options.Converters.BooleanConverter; + +/** + * Converter that can also convert from booleans and enumerations. + * + * <p> This is able to additionally convert from the standard set of + * boolean string values. If there is an overlap in values, those from + * the underlying enumeration will be taken. + */ +public abstract class BoolOrEnumConverter<T extends Enum<T>> extends EnumConverter<T>{ + + private T falseValue; + private T trueValue; + + /** + * You *must* implement a zero-argument constructor that delegates + * to this constructor, passing in the appropriate parameters. This + * comes from the base {@link EnumConverter} class. + * + * @param enumType The type of your enumeration; usually a class literal + * like MyEnum.class + * @param typeName The intuitive name of your enumeration, for example, the + * type name for CompilationMode might be "compilation mode". + * @param trueValue The enumeration value to associate with {@code true}. + * @param falseValue The enumeration value to associate with {@code false}. + */ + protected BoolOrEnumConverter(Class<T> enumType, String typeName, T trueValue, T falseValue) { + super(enumType, typeName); + this.trueValue = trueValue; + this.falseValue = falseValue; + } + + public T convert(String input) throws OptionsParsingException { + try { + return super.convert(input); + } catch (OptionsParsingException eEnum) { + try { + BooleanConverter booleanConverter = new BooleanConverter(); + boolean value = booleanConverter.convert(input); + return value ? trueValue : falseValue; + } catch (OptionsParsingException eBoolean) { + throw eEnum; + } + } + } +} diff --git a/src/main/java/com/google/devtools/common/options/EnumConverter.java b/src/main/java/com/google/devtools/common/options/EnumConverter.java index f65241a214..a1b72aed1a 100644 --- a/src/main/java/com/google/devtools/common/options/EnumConverter.java +++ b/src/main/java/com/google/devtools/common/options/EnumConverter.java @@ -19,10 +19,10 @@ import java.util.Arrays; /** * A converter superclass for converters that parse enums. * - * Just subclass this class, creating a zero aro argument constructor that + * <p>Just subclass this class, creating a zero aro argument constructor that * calls {@link #EnumConverter(Class, String)}. * - * This class compares the input string to the string returned by the toString() + * <p>This class compares the input string to the string returned by the toString() * method of each enum member in a case-insensitive way. Usually, this is the * name of the symbol, but beware if you override toString()! */ @@ -51,7 +51,7 @@ public abstract class EnumConverter<T extends Enum<T>> * Implements {@link #convert(String)}. */ @Override - public final T convert(String input) throws OptionsParsingException { + public T convert(String input) throws OptionsParsingException { for (T value : enumType.getEnumConstants()) { if (value.toString().equalsIgnoreCase(input)) { return value; diff --git a/src/main/java/com/google/devtools/common/options/OptionsParserImpl.java b/src/main/java/com/google/devtools/common/options/OptionsParserImpl.java index e339dcd7f2..4cd504b81e 100644 --- a/src/main/java/com/google/devtools/common/options/OptionsParserImpl.java +++ b/src/main/java/com/google/devtools/common/options/OptionsParserImpl.java @@ -421,8 +421,8 @@ class OptionsParserImpl { } } - private void addListValue(Field field, String name, Object value, - OptionPriority priority, String source, String implicitDependant, String expandedFrom) { + private void addListValue(Field field, Object value, OptionPriority priority, String source, + String implicitDependant, String expandedFrom) { ParsedOptionEntry entry = parsedValues.get(field); if (entry == null) { entry = new ParsedOptionEntry(ArrayListMultimap.create(), priority, source, @@ -609,8 +609,8 @@ class OptionsParserImpl { // Note: The type of the list member is not known; Java introspection // only makes it available in String form via the signature string // for the field declaration. - addListValue(field, originalName, convertedValue, - priority, sourceFunction.apply(originalName), implicitDependant, expandedFrom); + addListValue(field, convertedValue, priority, sourceFunction.apply(originalName), + implicitDependant, expandedFrom); } } @@ -683,7 +683,9 @@ class OptionsParserImpl { } static boolean isBooleanField(Field field) { - return field.getType().equals(boolean.class) || field.getType().equals(TriState.class); + return field.getType().equals(boolean.class) + || field.getType().equals(TriState.class) + || findConverter(field) instanceof BoolOrEnumConverter; } static boolean isSpecialNullDefault(String defaultValueString, Field optionField) { |