/**
* Copyright Alex Objelean
*/
package ro.isdc.wro.model.resource.processor.impl.css;
import java.io.IOException;
import java.io.Reader;
import java.io.Writer;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import ro.isdc.wro.model.group.processor.Minimize;
import ro.isdc.wro.model.resource.Resource;
import ro.isdc.wro.model.resource.ResourceType;
import ro.isdc.wro.model.resource.SupportedResourceType;
import ro.isdc.wro.model.resource.processor.ResourcePostProcessor;
import ro.isdc.wro.model.resource.processor.ResourcePreProcessor;
import ro.isdc.wro.model.resource.processor.support.CssCompressor;
/**
* A processor implementation using {@link CssCompressor} algorithm. This processor can be used as both: PreProcessor &
* postProcessor.<br/>
* This processor is annotated with {@link Minimize} because it performs minimization.
*
* @author Alex Objelean
*/
@Minimize
@SupportedResourceType(ResourceType.CSS)
public class CssCompressorProcessor
implements ResourcePreProcessor, ResourcePostProcessor {
private static final Logger LOG = LoggerFactory.getLogger(CssCompressorProcessor.class);
public static final String ALIAS = "cssCompressor";
/**
* {@inheritDoc}
*/
public void process(final Reader reader, final Writer writer)
throws IOException {
process(null, reader, writer);
}
/**
* {@inheritDoc}
*/
public void process(final Resource resource, final Reader reader, final Writer writer)
throws IOException {
try {
new CssCompressor(reader).compress(writer, -1);
writer.flush();
} catch (final Exception e) {
final String resourceUri = resource == null ? StringUtils.EMPTY : "[" + resource.getUri() + "]";
String message = "Exception while applying " + getClass().getSimpleName() + " processor on the "
+ resourceUri + " resource";
LOG.error(message, e);
throw new IOException(message);
} finally {
reader.close();
writer.close();
}
}
}