/*
* 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.types.resources.selectors;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.ProjectHelper;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.ComponentHelper;
import org.apache.tools.ant.AntTypeDefinition;
import org.apache.tools.ant.types.Resource;
/**
* InstanceOf ResourceSelector.
* @since Ant 1.7
*/
public class InstanceOf implements ResourceSelector {
private static final String ONE_ONLY = "Exactly one of class|type must be set.";
private Project project;
private Class<?> clazz;
private String type;
private String uri;
/**
* Set the Project instance for this InstanceOf selector.
* @param p the Project instance used for type comparisons.
*/
public void setProject(Project p) {
project = p;
}
/**
* Set the class to compare against.
* @param c the class.
*/
public void setClass(Class<?> c) {
if (clazz != null) {
throw new BuildException("The class attribute has already been set.");
}
clazz = c;
}
/**
* Set the Ant type to compare against.
* @param s the type name.
*/
public void setType(String s) {
type = s;
}
/**
* Set the URI in which the Ant type, if specified, should be defined.
* @param u the URI.
*/
public void setURI(String u) {
uri = u;
}
/**
* Get the comparison class.
* @return the Class object.
*/
public Class<?> getCheckClass() {
return clazz;
}
/**
* Get the comparison type.
* @return the String typename.
*/
public String getType() {
return type;
}
/**
* Get the type's URI.
* @return the String URI.
*/
public String getURI() {
return uri;
}
/**
* Return true if this Resource is selected.
* @param r the Resource to check.
* @return whether the Resource was selected.
* @throws BuildException if an error occurs.
*/
public boolean isSelected(Resource r) {
if ((clazz == null) == (type == null)) {
throw new BuildException(ONE_ONLY);
}
Class<?> c = clazz;
if (type != null) {
if (project == null) {
throw new BuildException(
"No project set for InstanceOf ResourceSelector; "
+ "the type attribute is invalid.");
}
AntTypeDefinition d = ComponentHelper.getComponentHelper(
project).getDefinition(ProjectHelper.genComponentName(uri, type));
if (d == null) {
throw new BuildException("type " + type + " not found.");
}
try {
c = d.innerGetTypeClass();
} catch (ClassNotFoundException e) {
throw new BuildException(e);
}
}
return c.isAssignableFrom(r.getClass());
}
}