package com.lexicalscope.jewel.cli;

 import static com.lexicalscope.fluentreflection.FluentReflection.type;

 import static com.lexicalscope.fluentreflection.ReflectionMatchers.*;

 import java.util.Collection;

 import java.util.List;

 import java.util.Set;

 import com.lexicalscope.fluentreflection.FluentClass;

 import com.lexicalscope.fluentreflection.FluentMethod;

 /*

  * Copyright 2011 Tim Wood

  *

  * 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.

  */

 abstract class AbstractOptionAdapter implements OptionAdapter {

     private final FluentClass<?> klass;

     protected final FluentMethod method;

     private final FluentClass<?> methodType;

     AbstractOptionAdapter(

             final FluentClass<?> klass,

             final FluentMethod method) {

         this.klass = klass;

         this.method = method;

         if (isMutator().matches(method))

         {

             this.methodType = method.args().get(0);

         }

         else

         {

             this.methodType = method.type();

         }

     }

     @Override public final FluentMethod method() {

         return method;

     }

     @Override public final FluentMethod correspondingOptionalityMethod() {

         if (isMutator().matches(method))

         {

             return null;

         }

         final List<FluentMethod> methods =

                 klass.methods(

                         hasName(addPrefix("is", method.property())).and(isExistence()));

         if (!methods.isEmpty()) {

             return methods.get(0);

         }

         return null;

     }

     private String addPrefix(final String prefix, final String name) {

         return prefix + name.substring(0, 1).toUpperCase() + name.substring(1);

     }

     @Override public final boolean isMultiValued() {

         return methodType.isType(reflectingOn(Collection.class)) && (methodType.assignableFrom(List.class) || methodType.assignableFrom(Set.class));

     }

     @Override public final FluentClass<? extends Object> getValueType() {

         final FluentClass<? extends Object> valueType =

                 isMultiValued()

                         ? methodType.asType(reflectingOn(Collection.class)).typeArgument(0)

                         : methodType;

         return reflectingOn(Object.class).matches(valueType)

                 ? type(String.class)

                 : valueType;

     }

     @Override public final boolean hasDefaultValue() {

         return !(defaultValue().length == 1 && defaultValue()[0].equals(Option.stringToMarkNoDefault));

     }

 }