Examples with AntFilterReader org.apache.tools.ant.types.AntFilterReader used on opensource projects

Example 1 with AntFilterReader

use of org.apache.tools.ant.types.AntFilterReader in project ant by apache.

the class ChainReaderHelper method expandReader.

/**
 * Creates and parameterizes a new FilterReader from a
 * <filterreader> element.
 *
 * @since Ant 1.8.0
 */
private Reader expandReader(final AntFilterReader filter, final Reader ancestor, final List<AntClassLoader> classLoadersToCleanUp) {
    final String className = filter.getClassName();
    final Path classpath = filter.getClasspath();
    if (className != null) {
        try {
            Class<? extends FilterReader> clazz;
            try {
                if (classpath == null) {
                    clazz = Class.forName(className).asSubclass(FilterReader.class);
                } else {
                    AntClassLoader al = filter.getProject().createClassLoader(classpath);
                    classLoadersToCleanUp.add(al);
                    clazz = Class.forName(className, true, al).asSubclass(FilterReader.class);
                }
            } catch (ClassCastException ex) {
                throw new BuildException("%s does not extend %s", className, FilterReader.class.getName());
            }
            Optional<Constructor<?>> ctor = Stream.of(clazz.getConstructors()).filter(c -> c.getParameterCount() == 1 && c.getParameterTypes()[0].isAssignableFrom(Reader.class)).findFirst();
            Object instream = ctor.orElseThrow(() -> new BuildException("%s does not define a public constructor that takes in a %s as its single argument.", className, Reader.class.getSimpleName())).newInstance(ancestor);
            setProjectOnObject(instream);
            if (Parameterizable.class.isAssignableFrom(clazz)) {
                ((Parameterizable) instream).setParameters(filter.getParams());
            }
            return (Reader) instream;
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | InvocationTargetException ex) {
            throw new BuildException(ex);
        }
    }
    // backwards compatibility makes it hard to change, though.
    return ancestor;
}

Example 2 with AntFilterReader

use of org.apache.tools.ant.types.AntFilterReader in project ant by apache.

the class ChainReaderHelper method getAssembledReader.

/**
 * Assemble the reader
 * @return the assembled reader
 * @exception BuildException if an error occurs
 */
public ChainReader getAssembledReader() throws BuildException {
    if (primaryReader == null) {
        throw new BuildException("primaryReader must not be null.");
    }
    Reader instream = primaryReader;
    final List<AntClassLoader> classLoadersToCleanUp = new ArrayList<>();
    final List<Object> finalFilters = filterChains.stream().map(FilterChain::getFilterReaders).flatMap(Collection::stream).collect(Collectors.toList());
    if (!finalFilters.isEmpty()) {
        boolean success = false;
        try {
            for (Object o : finalFilters) {
                if (o instanceof AntFilterReader) {
                    instream = expandReader((AntFilterReader) o, instream, classLoadersToCleanUp);
                } else if (o instanceof ChainableReader) {
                    setProjectOnObject(o);
                    instream = ((ChainableReader) o).chain(instream);
                    setProjectOnObject(instream);
                }
            }
            success = true;
        } finally {
            if (!success && !classLoadersToCleanUp.isEmpty()) {
                cleanUpClassLoaders(classLoadersToCleanUp);
            }
        }
    }
    return new ChainReader(instream, classLoadersToCleanUp);
}