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package org.glassfish.jersey.message.internal;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import javax.ws.rs.BadRequestException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
/**
* Abstract base class for form entity types marshalling & un-marshalling support.
*
* @param <T> form type.
*
* @author Paul Sandoz
* @author Marek Potociar (marek.potociar at oracle.com)
*/
public abstract class AbstractFormProvider<T> extends AbstractMessageReaderWriterProvider<T> {
public <M extends MultivaluedMap<String, String>> M readFrom(M map,
MediaType mediaType, boolean decode,
InputStream entityStream) throws IOException {
final String encoded = readFromAsString(entityStream, mediaType);
final String charsetName = ReaderWriter.getCharset(mediaType).name();
final StringTokenizer tokenizer = new StringTokenizer(encoded, "&");
String token;
try {
while (tokenizer.hasMoreTokens()) {
token = tokenizer.nextToken();
int idx = token.indexOf('=');
if (idx < 0) {
map.add(decode ? URLDecoder.decode(token, charsetName) : token, null);
} else if (idx > 0) {
if (decode) {
map.add(URLDecoder.decode(token.substring(0, idx), charsetName),
URLDecoder.decode(token.substring(idx + 1), charsetName));
} else {
map.add(token.substring(0, idx), token.substring(idx + 1));
}
}
}
return map;
} catch (IllegalArgumentException ex) {
throw new BadRequestException(ex);
}
}
public <M extends MultivaluedMap<String, String>> void writeTo(
M t,
MediaType mediaType,
OutputStream entityStream) throws IOException {
final String charsetName = ReaderWriter.getCharset(mediaType).name();
final StringBuilder sb = new StringBuilder();
for (Map.Entry<String, List<String>> e : t.entrySet()) {
for (String value : e.getValue()) {
if (sb.length() > 0) {
sb.append('&');
}
sb.append(URLEncoder.encode(e.getKey(), charsetName));
if (value != null) {
sb.append('=');
sb.append(URLEncoder.encode(value, charsetName));
}
}
}
writeToAsString(sb.toString(), entityStream, mediaType);
}
}