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/*
* Copyright 2000-2004 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.Properties;
import java.util.Stack;
import org.apache.tools.ant.AntClassLoader;
import org.apache.tools.ant.BuildException;
import org.apache.tools.ant.Project;
import org.apache.tools.ant.util.FileNameMapper;
/**
* Element to define a FileNameMapper.
*
* @author Stefan Bodewig
*/
public class Mapper extends DataType implements Cloneable {
protected MapperType type = null;
public Mapper(Project p) {
setProject(p);
}
/**
* Set the type of FileNameMapper to use.
*/
public void setType(MapperType type) {
if (isReference()) {
throw tooManyAttributes();
}
this.type = type;
}
protected String classname = null;
/**
* Set the class name of the FileNameMapper to use.
*/
public void setClassname(String classname) {
if (isReference()) {
throw tooManyAttributes();
}
this.classname = classname;
}
protected Path classpath = null;
/**
* Set the classpath to load the FileNameMapper through (attribute).
*/
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 FileNameMapper through (nested element).
*/
public Path createClasspath() {
if (isReference()) {
throw noChildrenAllowed();
}
if (this.classpath == null) {
this.classpath = new Path(getProject());
}
return this.classpath.createPath();
}
/**
* Set the classpath to load the FileNameMapper through via
* reference (attribute).
*/
public void setClasspathRef(Reference r) {
if (isReference()) {
throw tooManyAttributes();
}
createClasspath().setRefid(r);
}
protected String from = null;
/**
* Set the argument to FileNameMapper.setFrom
*/
public void setFrom(String from) {
if (isReference()) {
throw tooManyAttributes();
}
this.from = from;
}
protected String to = null;
/**
* Set the argument to FileNameMapper.setTo
*/
public void setTo(String to) {
if (isReference()) {
throw tooManyAttributes();
}
this.to = to;
}
/**
* Make this Mapper instance a reference to another Mapper.
*
* <p>You must not set any other attribute if you make it a
* reference.</p>
*/
public void setRefid(Reference r) throws BuildException {
if (type != null || from != null || to != null) {
throw tooManyAttributes();
}
super.setRefid(r);
}
/**
* Returns a fully configured FileNameMapper implementation.
*/
public FileNameMapper getImplementation() throws BuildException {
if (isReference()) {
return getRef().getImplementation();
}
if (type == null && classname == null) {
throw new BuildException("one of the attributes type or classname is required");
}
if (type != null && classname != null) {
throw new BuildException("must not specify both type and classname attribute");
}
try {
if (type != null) {
classname = type.getImplementation();
}
Class c = null;
if (classpath == null) {
c = Class.forName(classname);
} else {
AntClassLoader al = getProject().createClassLoader(classpath);
c = Class.forName(classname, true, al);
}
FileNameMapper m = (FileNameMapper) c.newInstance();
final Project project = getProject();
if (project != null) {
project.setProjectReference(m);
}
m.setFrom(from);
m.setTo(to);
return m;
} catch (BuildException be) {
throw be;
} catch (Throwable t) {
throw new BuildException(t);
} finally {
if (type != null) {
classname = null;
}
}
}
/**
* Performs the check for circular references and returns the
* referenced Mapper.
*/
protected Mapper getRef() {
if (!isChecked()) {
Stack stk = new Stack();
stk.push(this);
dieOnCircularReference(stk, getProject());
}
Object o = getRefid().getReferencedObject(getProject());
if (!(o instanceof Mapper)) {
String msg = getRefid().getRefId() + " doesn\'t denote a mapper";
throw new BuildException(msg);
} else {
return (Mapper) o;
}
}
/**
* Class as Argument to FileNameMapper.setType.
*/
public static class MapperType extends EnumeratedAttribute {
private Properties implementations;
public MapperType() {
implementations = new Properties();
implementations.put("identity",
"org.apache.tools.ant.util.IdentityMapper");
implementations.put("flatten",
"org.apache.tools.ant.util.FlatFileNameMapper");
implementations.put("glob",
"org.apache.tools.ant.util.GlobPatternMapper");
implementations.put("merge",
"org.apache.tools.ant.util.MergingMapper");
implementations.put("regexp",
"org.apache.tools.ant.util.RegexpPatternMapper");
implementations.put("package",
"org.apache.tools.ant.util.PackageNameMapper");
implementations.put("unpackage",
"org.apache.tools.ant.util.UnPackageNameMapper");
}
public String[] getValues() {
return new String[] {"identity", "flatten", "glob",
"merge", "regexp", "package", "unpackage"};
}
public String getImplementation() {
return implementations.getProperty(getValue());
}
}
}
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