| /* |
| * 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 |
| * |
| * https://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.ant.antunit; |
| |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.Project; |
| import org.apache.tools.ant.ProjectComponent; |
| import org.apache.tools.ant.taskdefs.condition.Condition; |
| import org.apache.tools.ant.types.Resource; |
| import org.apache.tools.ant.types.ResourceCollection; |
| |
| /** |
| * A condition that tests whether a given resource exists. |
| * |
| * @since AntUnit 1.2 |
| */ |
| public class ResourceExists extends ProjectComponent implements Condition { |
| private Resource resource; |
| private String refid; |
| |
| /** |
| * The resource to check as attribute. |
| * |
| * <p>Exactly one resource must be specfied either as attribute or |
| * nested element.</p> |
| * @param r resource to check |
| */ |
| public void setResource(Resource r) { |
| onlyOne(); |
| resource = r; |
| } |
| |
| /** |
| * The resource to check as a refid. |
| * @since AntUnit 1.3 |
| * @param refid resource to check as a refid |
| */ |
| public void setRefid(String refid) { |
| onlyOne(); |
| this.refid = refid; |
| } |
| |
| /** |
| * The resource to check as nested element. |
| * |
| * <p>Exactly one resource must be specfied either as attribute or |
| * nested element.</p> |
| * @param r resource to check |
| */ |
| public void add(Resource r) { |
| setResource(r); |
| } |
| |
| public boolean eval() { |
| if (resource == null && refid == null) { |
| throw new BuildException("You must specify a resource."); |
| } |
| Resource r = resource != null ? resource : expandRefId(); |
| log("Checking: " + r, Project.MSG_VERBOSE); |
| return r.isExists(); |
| } |
| |
| private void onlyOne() { |
| if (resource != null || refid != null) { |
| throw new BuildException("Only one resource can be tested."); |
| } |
| } |
| |
| // logic stolen from Ant's ResourceContains condition |
| private Resource expandRefId() { |
| if (getProject() == null) { |
| throw new BuildException("Cannot retrieve refid; project unset"); |
| } |
| Object o = getProject().getReference(refid); |
| if (!(o instanceof Resource)) { |
| if (o instanceof ResourceCollection) { |
| ResourceCollection rc = (ResourceCollection) o; |
| if (rc.size() == 1) { |
| o = rc.iterator().next(); |
| } else { |
| throw new BuildException("Referred resource collection must" |
| + " contain exactly one resource."); |
| } |
| } else { |
| throw new BuildException("'" + refid + "' is not a resource but " |
| + String.valueOf(o)); |
| } |
| } |
| return (Resource) o; |
| } |
| } |