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/**
 * Copyright (C) 2010 Mathieu Carbou 
 *
 * 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.mycila.ujd.api;

import com.google.common.base.Function;
import com.google.common.base.Predicate;

import java.util.Collection;

/**
 * @author Mathieu Carbou ([email protected])
 */
public final class UJD {

    private UJD() {
    }

    public static final Function, Loader> JAVACLASS_TO_LOADER
            = new Function, Loader>() {
        public Loader apply(JavaClass from) {
            return from.getLoader();
        }
    };

    public static final Function> LOADER_TO_CONTAINER
            = new Function>() {
        public Iterable apply(Loader from) {
            return from.getContainers();
        }
    };

    public static final Function> CONTAINER_TO_CONTAINED_CLASSES
            = new Function>() {
        public Iterable apply(Container from) {
            return from.getClasses();
        }
    };

    public static final Function CONTAINED_CLASS_TO_CONTAINER
            = new Function() {
        public Container apply(ContainedClass from) {
            return from.getContainer();
        }
    };

    public static final Function, String> CONTAINED_CLASS_NAME
            = new Function, String>() {
        public String apply(ContainedJavaClass from) {
            return from.getClassName();
        }
    };

    public static final Function LOADER_NAME = new Function() {
        public String apply(Loader loader) {
            return loader.getName();
        }
    };

    public static Predicate hasParentLoader(final Loader loader) {
        return new Predicate() {
            public boolean apply(Loader input) {
                return input.getParent() == loader;
            }
        };
    }

    public static Predicate> hasLoader(final Loader loader) {
        return new Predicate>() {
            public boolean apply(JavaClass input) {
                return input.getLoader() == loader;
            }
        };
    }

    public static Predicate> javaClassStartsWith(final String prefix) {
        return new Predicate>() {
            public boolean apply(JavaClass javaClass) {
                return javaClass.get().getName().startsWith(prefix);
            }
        };
    }

    public static Predicate containedClassStartsWith(final String prefix) {
        return new Predicate() {
            public boolean apply(ContainedClass containedClass) {
                return containedClass.getClassName().startsWith(prefix);
            }
        };
    }

    public static Predicate containedClassNameIn(final Collection col) {
        return new Predicate() {
            public boolean apply(ContainedClass containedClass) {
                return col.contains(containedClass.getClassName());
            }
        };
    }

    public static Predicate isLoaderNamed(final String loaderName) {
        return new Predicate() {
            public boolean apply(Loader loader) {
                return loader.getName().equals(loaderName);
            }
        };
    }

    public static  Iterable memoize(Iterable it) {
        return new MemoizingIterable(it);
    }

}