BootClasspathLibraryOption.java

/*
 * Copyright 2009 Alin Dreghiciu.
 *
 * 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 org.ops4j.pax.exam.options;

import static org.ops4j.lang.NullArgumentException.validateNotNull;

import org.ops4j.pax.exam.Option;

/**
 * Option specifying a library that will be made available in teh boot classpath.
 * 
 * @author Alin Dreghiciu (adreghiciu@gmail.com)
 * @since 0.5.0, April 29, 2009
 */
public class BootClasspathLibraryOption implements Option {

    /**
     * Library url (cannot be null).
     */
    private final UrlReference libraryUrl;
    /**
     * If the library should be in classpath after framework jar.
     */
    private boolean append;

    /**
     * Constructor.
     * 
     * @param libraryUrl
     *            library url (cannot be null or empty)
     * 
     * @throws IllegalArgumentException
     *             - If url is null or empty
     */
    public BootClasspathLibraryOption(final String libraryUrl) {
        this(new RawUrlReference(libraryUrl));
    }

    /**
     * Constructor.
     * 
     * @param libraryUrl
     *            library url (cannot be null or empty)
     * 
     * @throws IllegalArgumentException
     *             - If url is null
     */
    public BootClasspathLibraryOption(final UrlReference libraryUrl) {
        validateNotNull(libraryUrl, "URL");
        this.libraryUrl = libraryUrl;
        append = true;
    }

    /**
     * To be used to specify that this library should be in the classpath before framework library.
     * 
     * @return itself, for fluent api usage
     */
    public BootClasspathLibraryOption beforeFramework() {
        append = false;
        return itself();
    }

    /**
     * To be used to specify that this library should be in the classpath after framework library.
     * 
     * @return itself, for fluent api usage
     */
    public BootClasspathLibraryOption afterFramework() {
        append = true;
        return itself();
    }

    /**
     * Getter.
     * 
     * @return library url
     */
    public UrlReference getLibraryUrl() {
        return libraryUrl;
    }

    /**
     * Getter.
     * 
     * @return true if the library should be before framework library in the classpath.
     */
    public boolean isBeforeFramework() {
        return !append;
    }

    /**
     * Getter.
     * 
     * @return true if the library should be after framework library in the classpath.
     */
    public boolean isAfterFramework() {
        return append;
    }

    /**
     * {@inheritDoc}
     */
    @Override
    public String toString() {
        final StringBuilder sb = new StringBuilder();
        sb.append("BootClasspathOption");
        sb.append("{url=").append(libraryUrl);
        sb.append(", append=").append(append);
        sb.append('}');
        return sb.toString();
    }

    protected BootClasspathLibraryOption itself() {
        return this;
    }
}