org.mutabilitydetector.locations.ClassNameConverter Maven / Gradle / Ivy

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Lightweight analysis tool for detecting mutability in Java classes.
There is a newer version: 0.10.6
package org.mutabilitydetector.locations;

/*
 * #%L
 * MutabilityDetector
 * %%
 * Copyright (C) 2008 - 2014 Graham Allan
 * %%
 * 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.
 * #L%
 */



import static com.google.common.collect.FluentIterable.from;
import static java.util.Collections.singleton;

import javax.annotation.Nonnull;
import javax.annotation.concurrent.Immutable;


import com.google.common.base.Function;

/**
 * @author Graham Allan / Grundlefleck at gmail dot com
 */
@Immutable
public final class ClassNameConverter {

    public static final ClassNameConverter CONVERTER = new ClassNameConverter();
    public static final Function TO_DOTTED_STRING = new Function() {
        @Override public String apply(@Nonnull String input) { return CONVERTER.dotted(input); }
    };

    public String dotted(final String givenClassName) {
        return from(singleton(givenClassName))
                .transform(SINGLE_DIMENSIONAL_IF_ARRAY)
                .transform(REMOVE_ARRAY_DESCRIPTOR_IF_REFERENCE_TYPE)
                .transform(REMOVE_REFERENCE_DESCRIPTOR_IF_REFERENCE_TYPE)
                .transform(REMOVE_CLASS_EXTENSION)
                .transform(REMOVE_TRAILING_SEMICOLON)
                .transform(REPLACE_SLASHES_WITH_DOTS)
                .first().get();
    }

    private static final Function SINGLE_DIMENSIONAL_IF_ARRAY = new Function() {
        @Override public String apply(@Nonnull String input) { return input.replaceAll("\\[+", "["); }
    };

    private static final Function REMOVE_ARRAY_DESCRIPTOR_IF_REFERENCE_TYPE = new Function() {
        @Override public String apply(@Nonnull String input) { return input.startsWith("[L") ? input.replace("[L", "") : input; }
    };

    private static final Function REMOVE_REFERENCE_DESCRIPTOR_IF_REFERENCE_TYPE = new Function() {
        @Override public String apply(@Nonnull String input) { return input.startsWith("L") ? input.substring(1) : input; }
    };
    
    private static final Function REMOVE_CLASS_EXTENSION = new Function() {
        @Override public String apply(@Nonnull String input) { return input.endsWith(".class") ? input.replace(".class", "") : input; }
    };

    private static final Function REMOVE_TRAILING_SEMICOLON = new Function() {
        @Override public String apply(@Nonnull String input) { return input.replace(";", ""); }
    };

    private static final Function REPLACE_SLASHES_WITH_DOTS = new Function() {
        @Override public String apply(@Nonnull String input) { return input.replace("/", "."); }
    };
    
}