1 package org.apache.maven.shared.mapping; 2 3 /* 4 * Licensed to the Apache Software Foundation (ASF) under one 5 * or more contributor license agreements. See the NOTICE file 6 * distributed with this work for additional information 7 * regarding copyright ownership. The ASF licenses this file 8 * to you under the Apache License, Version 2.0 (the 9 * "License"); you may not use this file except in compliance 10 * with the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, 15 * software distributed under the License is distributed on an 16 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 17 * KIND, either express or implied. See the License for the 18 * specific language governing permissions and limitations 19 * under the License. 20 */ 21 22 import org.apache.maven.artifact.Artifact; 23 import org.codehaus.plexus.interpolation.InterpolationException; 24 import org.codehaus.plexus.interpolation.ObjectBasedValueSource; 25 import org.codehaus.plexus.interpolation.RegexBasedInterpolator; 26 27 /** 28 * <p> 29 * Utilities used to evaluate an expression. 30 * </p> 31 * <p> 32 * The expression might use any field of the {@link Artifact} interface. Some examples might be: 33 * </p> 34 * <ul> 35 * <li>@{artifactId}@-@{version}@@{dashClassifier?}@.@{extension}@</li> 36 * <li>@{artifactId}@-@{version}@.@{extension}@</li> 37 * <li>@{artifactId}@.@{extension}@</li> 38 * </ul> 39 * <p> 40 * Although parts of this code comes from the Assembly Plugin, it cannot be shared with the Assembly Plugin. The reason 41 * for this is that the Assembly Plugin always uses a prefix for the expressions, whereas this code does not. 42 * <p/> 43 * 44 * @author Stephane Nicoll 45 * @author Dennis Lundberg 46 * @version $Id: MappingUtils.java 1714435 2015-11-15 11:55:21Z khmarbaise $ 47 */ 48 public final class MappingUtils 49 { 50 private MappingUtils() 51 { 52 // prevent instantiation. 53 } 54 55 /** 56 * Default file name mapping. 57 */ 58 public static final String DEFAULT_FILE_NAME_MAPPING = "@{artifactId}@-@{baseVersion}@.@{extension}@"; 59 60 /** 61 * Default file name mapping incl. classifier. 62 */ 63 public static final String DEFAULT_FILE_NAME_MAPPING_CLASSIFIER = 64 "@{artifactId}@-@{baseVersion}@-@{classifier}@.@{extension}@"; 65 66 /** 67 * Evaluates the specified expression for the given artifact. 68 * 69 * @param expression the expression to evaluate 70 * @param artifact the artifact to use as value object for tokens 71 * @throws InterpolationException In case of an error. 72 * @return expression the evaluated expression 73 */ 74 public static String evaluateFileNameMapping( String expression, Artifact artifact ) 75 throws InterpolationException 76 { 77 String value = expression; 78 79 RegexBasedInterpolator interpolator = new RegexBasedInterpolator( "\\@\\{(", ")?([^}]+)\\}@" ); 80 interpolator.addValueSource( new ObjectBasedValueSource( artifact ) ); 81 interpolator.addValueSource( new ObjectBasedValueSource( artifact.getArtifactHandler() ) ); 82 83 // Support for special expressions, like @{dashClassifier?}@, see MWAR-212 84 interpolator.addValueSource( new DashClassifierValueSource( artifact.getClassifier() ) ); 85 86 value = interpolator.interpolate( value, "__artifact" ); 87 88 return value; 89 } 90 }