| /* |
| * 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.tools.ant.taskdefs; |
| |
| import org.apache.tools.ant.Task; |
| import org.apache.tools.ant.BuildException; |
| import org.apache.tools.ant.taskdefs.condition.Condition; |
| import org.apache.tools.ant.types.Reference; |
| import org.apache.tools.ant.types.Comparison; |
| import org.apache.tools.ant.types.ResourceCollection; |
| |
| /** |
| * Count resources from a ResourceCollection, storing to a property or |
| * writing to the log. Can also be used as a Condition. |
| * @since Ant 1.7 |
| */ |
| public class ResourceCount extends Task implements Condition { |
| |
| private static final String ONE_NESTED_MESSAGE |
| = "ResourceCount can count resources from exactly one nested ResourceCollection."; |
| |
| private static final String COUNT_REQUIRED |
| = "Use of the ResourceCount condition requires that the count attribute be set."; |
| |
| private ResourceCollection rc; |
| private Comparison when = Comparison.EQUAL; |
| private Integer count; |
| private String property; |
| |
| /** |
| * Add the ResourceCollection to count. |
| * @param r the ResourceCollection to count. |
| * @throws BuildException if already set. |
| */ |
| public void add(ResourceCollection r) { |
| if (rc != null) { |
| throw new BuildException(ONE_NESTED_MESSAGE); |
| } |
| rc = r; |
| } |
| |
| /** |
| * Set the ResourceCollection reference. |
| * @param r the Reference. |
| */ |
| public void setRefid(Reference r) { |
| Object o = r.getReferencedObject(); |
| if (!(o instanceof ResourceCollection)) { |
| throw new BuildException(r.getRefId() |
| + " doesn\'t denote a ResourceCollection"); |
| } |
| add((ResourceCollection) o); |
| } |
| |
| /** |
| * Execute as a Task. |
| */ |
| public void execute() { |
| if (rc == null) { |
| throw new BuildException(ONE_NESTED_MESSAGE); |
| } |
| if (property == null) { |
| log("resource count = " + rc.size()); |
| } else { |
| getProject().setNewProperty(property, Integer.toString(rc.size())); |
| } |
| } |
| |
| /** |
| * Fulfill the condition contract. |
| * @return true if the specified ResourceCollection satisfies the set criteria. |
| * @throws BuildException if an error occurs. |
| */ |
| public boolean eval() { |
| if (rc == null) { |
| throw new BuildException(ONE_NESTED_MESSAGE); |
| } |
| if (count == null) { |
| throw new BuildException(COUNT_REQUIRED); |
| } |
| return when.evaluate(new Integer(rc.size()).compareTo(count)); |
| } |
| |
| /** |
| * Set the target count number for use as a Condition. |
| * @param c number of Resources as int. |
| */ |
| public void setCount(int c) { |
| count = new Integer(c); |
| } |
| |
| /** |
| * Set the comparison for use as a Condition. |
| * @param c Comparison (an EnumeratedAttribute) When. |
| * @see org.apache.tools.ant.types.Comparison |
| */ |
| public void setWhen(Comparison c) { |
| when = c; |
| } |
| |
| /** |
| * Set the name of the property to set in task mode. |
| * @param p the property name to set. |
| */ |
| public void setProperty(String p) { |
| property = p; |
| } |
| |
| } |