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/*
* Copyright 2002,2004-2005 The Apache Software Foundation
*
* Licensed 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;
import java.util.Vector;
import org.apache.tools.ant.BuildException;
/**
* An AntFilterReader is a wrapper class that encloses the classname
* and configuration of a Configurable FilterReader.
*/
public final class AntFilterReader
extends DataType implements Cloneable {
private String className;
private final Vector parameters = new Vector();
private Path classpath;
/**
* Set the className attribute.
*
* @param className a <code>String</code> value
*/
public void setClassName(final String className) {
this.className = className;
}
/**
* Get the className attribute.
*
* @return a <code>String</code> value
*/
public String getClassName() {
return className;
}
/**
* Add a Parameter.
*
* @param param a <code>Parameter</code> value
*/
public void addParam(final Parameter param) {
parameters.addElement(param);
}
/**
* Set the classpath to load the FilterReader through (attribute).
* @param classpath a classpath
*/
public void setClasspath(Path classpath) {
if (isReference()) {
throw tooManyAttributes();
}
if (this.classpath == null) {
this.classpath = classpath;
} else {
this.classpath.append(classpath);
}
}
/**
* Set the classpath to load the FilterReader through (nested element).
* @return a classpath to be configured
*/
public Path createClasspath() {
if (isReference()) {
throw noChildrenAllowed();
}
if (this.classpath == null) {
this.classpath = new Path(getProject());
}
return this.classpath.createPath();
}
/**
* Get the classpath.
* @return the classpath
*/
public Path getClasspath() {
return classpath;
}
/**
* Set the classpath to load the FilterReader through via
* reference (attribute).
* @param r a reference to a classpath
*/
public void setClasspathRef(Reference r) {
if (isReference()) {
throw tooManyAttributes();
}
createClasspath().setRefid(r);
}
/**
* The parameters for this filter.
*
* @return a <code>Parameter[]</code> value
*/
public Parameter[] getParams() {
Parameter[] params = new Parameter[parameters.size()];
parameters.copyInto(params);
return params;
}
/**
* Makes this instance in effect a reference to another AntFilterReader
* instance.
*
* <p>You must not set another attribute or nest elements inside
* this element if you make it a reference.</p>
*
* @param r the reference to which this instance is associated
* @exception BuildException if this instance already has been configured.
*/
public void setRefid(Reference r) throws BuildException {
if (!parameters.isEmpty() || className != null
|| classpath != null) {
throw tooManyAttributes();
}
// change this to get the objects from the other reference
Object o = r.getReferencedObject(getProject());
if (o instanceof AntFilterReader) {
AntFilterReader afr = (AntFilterReader) o;
setClassName(afr.getClassName());
setClasspath(afr.getClasspath());
Parameter[] p = afr.getParams();
if (p != null) {
for (int i = 0; i < p.length; i++) {
addParam(p[i]);
}
}
} else {
String msg = r.getRefId() + " doesn\'t refer to a FilterReader";
throw new BuildException(msg);
}
super.setRefid(r);
}
}
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