try {
                Node xml = new XmlParser().parse(instr);
                for (Object taskdefObject : (NodeList) xml.get("taskdef")) {
                    Node taskdef = (Node) taskdefObject;
                    String name = (String) taskdef.get("@name");
                    String className = (String) taskdef.get("@classname");
                    addTaskDefinition(name, className);
                }
            } catch (Exception ex) {

configurations {
    pmd
}

dependencies {
    pmd group: 'pmd', name: 'pmd', version: '4.2.5'
}
// end::define-classpath[]

// tag::use-classpath[]
tasks.register('check') {
    doLast {
        ant.taskdef(name: 'pmd',
                    classname: 'net.sourceforge.pmd.ant.PMDTask',
                    classpath: configurations.pmd.asPath)
        ant.pmd(shortFilenames: 'true',
                failonruleviolation: 'true',

    from(checkstyle)
    into("libs")
}

// tag::configure-task[]
tasks.register("check") {
    val checkstyleConfig = file("checkstyle.xml")
    doLast {
        ant.withGroovyBuilder {
            "taskdef"("resource" to "com/puppycrawl/tools/checkstyle/ant/checkstyle-ant-task.properties") {
                "classpath" {
                    "fileset"("dir" to "libs", "includes" to "*.jar")
                }
            }

    jasper 'org.apache.tomcat.embed:tomcat-embed-jasper:9.0.2'
}

tasks.register('preCompileJsps') {
    def jasperClasspath = configurations.jasper.asPath
    def projectLayout = layout
    doLast {
        ant.taskdef(classname: 'org.apache.jasper.JspC',
                    name: 'jasper',
                    classpath: jasperClasspath)
        ant.jasper(validateXml: false,

dependencies {
    pmd(group = "pmd", name = "pmd", version = "4.2.5")
}
// end::define-classpath[]

// tag::use-classpath[]
tasks.register("check") {
    doLast {
        ant.withGroovyBuilder {
            "taskdef"("name" to "pmd",
                      "classname" to "net.sourceforge.pmd.ant.PMDTask",
                      "classpath" to pmd.asPath)
            "pmd"("shortFilenames" to true,

    from configurations.checkstyle
    into 'libs'
}

// tag::configure-task[]
tasks.register('check') {
    def checkstyleConfig = file('checkstyle.xml')
    doLast {
        ant.taskdef(resource: 'com/puppycrawl/tools/checkstyle/ant/checkstyle-ant-task.properties') {
            classpath {
                fileset(dir: 'libs', includes: '*.jar')
            }
        }

}

tasks.register("preCompileJsps") {
    val jasperClasspath = jasper.asPath
    val projectLayout = layout
    doLast {
        ant.withGroovyBuilder {
            "taskdef"("classname" to "org.apache.jasper.JspC",
                      "name" to "jasper",
                      "classpath" to jasperClasspath)
            "jasper"("validateXml" to false,

            @SuppressWarnings("UnusedDeclaration")
            public Object doCall(Object it) {
                GroovyObjectSupport antBuilder = (GroovyObjectSupport) it;
                antBuilder.invokeMethod("taskdef", ImmutableMap.of(
                        "name", "jacocoReport",
                        "classname", "org.jacoco.ant.ReportTask"
                ));
                action.execute(antBuilder);
                return null;

            @SuppressWarnings("UnusedDeclaration")
            public Object doCall(Object it) {
                final GroovyObjectSupport antBuilder = (GroovyObjectSupport) it;

                antBuilder.invokeMethod("taskdef", ImmutableMap.of(
                    "name", "groovy",
                    "classname", "org.codehaus.groovy.ant.Groovy"
                ));

 */
public interface IsolatedAntBuilder {

    /**
     * Creates a copy of this builder which uses the given libraries. These classes are visible for use in
     * taskdef/typedef tasks.
     *
     * @param classpath The library classpath
     * @return a copy of this builder
     */
    IsolatedAntBuilder withClasspath(Iterable<File> classpath);

    /**