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package com.sun.jersey.server.impl.model.parameter.multivalued;
import java.lang.annotation.Annotation;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.lang.reflect.Type;
import java.text.ParseException;
import java.util.Date;
import javax.ws.rs.WebApplicationException;
import com.sun.jersey.api.container.ContainerException;
import com.sun.jersey.core.header.HttpDateFormat;
import com.sun.jersey.core.reflection.ReflectionHelper;
import com.sun.jersey.spi.StringReader;
import com.sun.jersey.spi.StringReaderProvider;
/**
*
* @author Paul Sandoz
*/
public class StringReaderProviders {
private static abstract class AbstractStringReader implements StringReader {
public Object fromString(String value) {
try {
return _fromString(value);
} catch (InvocationTargetException ex) {
// if the value is an empty string, return null
if (value.length() == 0) {
return null;
}
Throwable target = ex.getTargetException();
if (target instanceof WebApplicationException) {
throw (WebApplicationException)target;
} else {
throw new ExtractorContainerException(target);
}
} catch (Exception ex) {
throw new ContainerException(ex);
}
}
protected abstract Object _fromString(String value) throws Exception;
}
public static class StringConstructor implements StringReaderProvider {
public StringReader getStringReader(Class type, Type genericType, Annotation[] annotations) {
final Constructor constructor = ReflectionHelper.getStringConstructor(type);
if (constructor == null)
return null;
return new AbstractStringReader() {
protected Object _fromString(String value) throws Exception {
return constructor.newInstance(value);
}
};
}
}
public static class TypeValueOf implements StringReaderProvider {
public StringReader getStringReader(Class type, Type genericType, Annotation[] annotations) {
final Method valueOf = ReflectionHelper.getValueOfStringMethod(type);
if (valueOf == null)
return null;
return new AbstractStringReader() {
public Object _fromString(String value) throws Exception {
return valueOf.invoke(null, value);
}
};
}
}
public static class TypeFromString implements StringReaderProvider {
public StringReader getStringReader(Class type, Type genericType, Annotation[] annotations) {
final Method fromString = ReflectionHelper.getFromStringStringMethod(type);
if (fromString == null)
return null;
return new AbstractStringReader() {
public Object _fromString(String value) throws Exception {
return fromString.invoke(null, value);
}
};
}
}
public static class TypeFromStringEnum extends TypeFromString {
@Override
public StringReader getStringReader(Class type, Type genericType, Annotation[] annotations) {
if (!Enum.class.isAssignableFrom(type))
return null;
return super.getStringReader(type, genericType, annotations);
}
}
public static class DateProvider implements StringReaderProvider {
public StringReader getStringReader(Class type, Type genericType, Annotation[] annotations) {
if (type != Date.class)
return null;
return new StringReader() {
public Object fromString(String value) {
try {
return HttpDateFormat.readDate(value);
} catch (ParseException ex) {
throw new ExtractorContainerException(ex);
}
}
};
}
}
}