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Update #0 - First Release
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158
sources/main/java/org/apache/commons/lang3/ClassPathUtils.java
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158
sources/main/java/org/apache/commons/lang3/ClassPathUtils.java
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/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.commons.lang3;
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/**
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* Operations regarding the classpath.
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*
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* <p>
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* The methods of this class do not allow {@code null} inputs.
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* </p>
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*
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* @since 3.3
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*/
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//@Immutable
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public class ClassPathUtils {
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/**
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* <p>
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* {@code ClassPathUtils} instances should NOT be constructed in standard
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* programming. Instead, the class should be used as
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* {@code ClassPathUtils.toFullyQualifiedName(MyClass.class, "MyClass.properties");}.
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* </p>
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*
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* <p>
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* This constructor is public to permit tools that require a JavaBean instance
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* to operate.
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* </p>
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*/
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public ClassPathUtils() {
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}
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/**
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* Returns the fully qualified name for the resource with name
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* {@code resourceName} relative to the given context.
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*
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* <p>
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* Note that this method does not check whether the resource actually exists. It
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* only constructs the name. Null inputs are not allowed.
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* </p>
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*
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* <pre>
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* ClassPathUtils.toFullyQualifiedName(StringUtils.class,
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* "StringUtils.properties") = "org.apache.commons.lang3.StringUtils.properties"
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* </pre>
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*
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* @param context The context for constructing the name.
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* @param resourceName the resource name to construct the fully qualified name
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* for.
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* @return the fully qualified name of the resource with name
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* {@code resourceName}.
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* @throws java.lang.NullPointerException if either {@code context} or
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* {@code resourceName} is null.
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*/
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public static String toFullyQualifiedName(final Class<?> context, final String resourceName) {
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Validate.notNull(context, "context");
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Validate.notNull(resourceName, "resourceName");
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return toFullyQualifiedName(context.getPackage(), resourceName);
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}
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/**
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* Returns the fully qualified name for the resource with name
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* {@code resourceName} relative to the given context.
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*
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* <p>
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* Note that this method does not check whether the resource actually exists. It
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* only constructs the name. Null inputs are not allowed.
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* </p>
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*
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* <pre>
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* ClassPathUtils.toFullyQualifiedName(StringUtils.class.getPackage(),
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* "StringUtils.properties") = "org.apache.commons.lang3.StringUtils.properties"
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* </pre>
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*
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* @param context The context for constructing the name.
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* @param resourceName the resource name to construct the fully qualified name
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* for.
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* @return the fully qualified name of the resource with name
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* {@code resourceName}.
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* @throws java.lang.NullPointerException if either {@code context} or
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* {@code resourceName} is null.
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*/
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public static String toFullyQualifiedName(final Package context, final String resourceName) {
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Validate.notNull(context, "context");
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Validate.notNull(resourceName, "resourceName");
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return context.getName() + "." + resourceName;
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}
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/**
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* Returns the fully qualified path for the resource with name
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* {@code resourceName} relative to the given context.
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*
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* <p>
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* Note that this method does not check whether the resource actually exists. It
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* only constructs the path. Null inputs are not allowed.
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* </p>
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*
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* <pre>
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* ClassPathUtils.toFullyQualifiedPath(StringUtils.class,
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* "StringUtils.properties") = "org/apache/commons/lang3/StringUtils.properties"
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* </pre>
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*
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* @param context The context for constructing the path.
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* @param resourceName the resource name to construct the fully qualified path
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* for.
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* @return the fully qualified path of the resource with name
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* {@code resourceName}.
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* @throws java.lang.NullPointerException if either {@code context} or
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* {@code resourceName} is null.
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*/
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public static String toFullyQualifiedPath(final Class<?> context, final String resourceName) {
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Validate.notNull(context, "context");
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Validate.notNull(resourceName, "resourceName");
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return toFullyQualifiedPath(context.getPackage(), resourceName);
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}
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/**
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* Returns the fully qualified path for the resource with name
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* {@code resourceName} relative to the given context.
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*
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* <p>
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* Note that this method does not check whether the resource actually exists. It
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* only constructs the path. Null inputs are not allowed.
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* </p>
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*
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* <pre>
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* ClassPathUtils.toFullyQualifiedPath(StringUtils.class.getPackage(),
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* "StringUtils.properties") = "org/apache/commons/lang3/StringUtils.properties"
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* </pre>
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*
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* @param context The context for constructing the path.
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* @param resourceName the resource name to construct the fully qualified path
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* for.
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* @return the fully qualified path of the resource with name
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* {@code resourceName}.
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* @throws java.lang.NullPointerException if either {@code context} or
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* {@code resourceName} is null.
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*/
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public static String toFullyQualifiedPath(final Package context, final String resourceName) {
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Validate.notNull(context, "context");
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Validate.notNull(resourceName, "resourceName");
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return context.getName().replace('.', '/') + "/" + resourceName;
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}
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}
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