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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.apache.commons.lang3;

/**
 * Operations regarding the classpath.
 *
 * 

The methods of this class do not allow {@code null} inputs.

* * @since 3.3 */ //@Immutable public class ClassPathUtils { /** *

{@code ClassPathUtils} instances should NOT be constructed in * standard programming. Instead, the class should be used as * {@code ClassPathUtils.toFullyQualifiedName(MyClass.class, "MyClass.properties");}.

* *

This constructor is public to permit tools that require a JavaBean * instance to operate.

*/ public ClassPathUtils() { super(); } /** * Returns the fully qualified name for the resource with name {@code resourceName} relative to the given context. * *

Note that this method does not check whether the resource actually exists. * It only constructs the name. * Null inputs are not allowed.

* *
     * ClassPathUtils.toFullyQualifiedName(StringUtils.class, "StringUtils.properties") = "org.apache.commons.lang3.StringUtils.properties"
     * 
* * @param context The context for constructing the name. * @param resourceName the resource name to construct the fully qualified name for. * @return the fully qualified name of the resource with name {@code resourceName}. * @throws java.lang.NullPointerException if either {@code context} or {@code resourceName} is null. */ public static String toFullyQualifiedName(final Class context, final String resourceName) { Validate.notNull(context, "Parameter '%s' must not be null!", "context" ); Validate.notNull(resourceName, "Parameter '%s' must not be null!", "resourceName"); return toFullyQualifiedName(context.getPackage(), resourceName); } /** * Returns the fully qualified name for the resource with name {@code resourceName} relative to the given context. * *

Note that this method does not check whether the resource actually exists. * It only constructs the name. * Null inputs are not allowed.

* *
     * ClassPathUtils.toFullyQualifiedName(StringUtils.class.getPackage(), "StringUtils.properties") = "org.apache.commons.lang3.StringUtils.properties"
     * 
* * @param context The context for constructing the name. * @param resourceName the resource name to construct the fully qualified name for. * @return the fully qualified name of the resource with name {@code resourceName}. * @throws java.lang.NullPointerException if either {@code context} or {@code resourceName} is null. */ public static String toFullyQualifiedName(final Package context, final String resourceName) { Validate.notNull(context, "Parameter '%s' must not be null!", "context" ); Validate.notNull(resourceName, "Parameter '%s' must not be null!", "resourceName"); return context.getName() + "." + resourceName; } /** * Returns the fully qualified path for the resource with name {@code resourceName} relative to the given context. * *

Note that this method does not check whether the resource actually exists. * It only constructs the path. * Null inputs are not allowed.

* *
     * ClassPathUtils.toFullyQualifiedPath(StringUtils.class, "StringUtils.properties") = "org/apache/commons/lang3/StringUtils.properties"
     * 
* * @param context The context for constructing the path. * @param resourceName the resource name to construct the fully qualified path for. * @return the fully qualified path of the resource with name {@code resourceName}. * @throws java.lang.NullPointerException if either {@code context} or {@code resourceName} is null. */ public static String toFullyQualifiedPath(final Class context, final String resourceName) { Validate.notNull(context, "Parameter '%s' must not be null!", "context" ); Validate.notNull(resourceName, "Parameter '%s' must not be null!", "resourceName"); return toFullyQualifiedPath(context.getPackage(), resourceName); } /** * Returns the fully qualified path for the resource with name {@code resourceName} relative to the given context. * *

Note that this method does not check whether the resource actually exists. * It only constructs the path. * Null inputs are not allowed.

* *
     * ClassPathUtils.toFullyQualifiedPath(StringUtils.class.getPackage(), "StringUtils.properties") = "org/apache/commons/lang3/StringUtils.properties"
     * 
* * @param context The context for constructing the path. * @param resourceName the resource name to construct the fully qualified path for. * @return the fully qualified path of the resource with name {@code resourceName}. * @throws java.lang.NullPointerException if either {@code context} or {@code resourceName} is null. */ public static String toFullyQualifiedPath(final Package context, final String resourceName) { Validate.notNull(context, "Parameter '%s' must not be null!", "context" ); Validate.notNull(resourceName, "Parameter '%s' must not be null!", "resourceName"); return context.getName().replace('.', '/') + "/" + resourceName; } }




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