Simple generic exception mapper

git-svn-id: https://develop.sub.uni-goettingen.de/repos/textgrid/trunk/services/aggregator@13529 7c539038-3410-0410-b1ec-0f2a7bf1c452

Simple generic exception mapper
a4d00203 · Thorsten Vitt · 99ba20f7 · a4d00203
Commit a4d00203 authored 12 years ago by Thorsten Vitt
--- a/src/main/java/info/textgrid/services/aggregator/GenericExceptionMapper.java
+++ b/src/main/java/info/textgrid/services/aggregator/GenericExceptionMapper.java
+package info.textgrid.services.aggregator;
+import info.textgrid.namespaces.middleware.tgcrud.services.tgcrudservice.AuthFault;
+import info.textgrid.namespaces.middleware.tgcrud.services.tgcrudservice.IoFault;
+import info.textgrid.namespaces.middleware.tgcrud.services.tgcrudservice.MetadataParseFault;
+import info.textgrid.namespaces.middleware.tgcrud.services.tgcrudservice.ObjectNotFoundFault;
+import info.textgrid.namespaces.middleware.tgcrud.services.tgcrudservice.ProtocolNotImplementedFault;
+import java.text.MessageFormat;
+import java.util.Map;
+import javax.ws.rs.core.MediaType;
+import javax.ws.rs.core.Response;
+import javax.ws.rs.core.Response.ResponseBuilder;
+import javax.ws.rs.core.Response.Status;
+import javax.ws.rs.ext.ExceptionMapper;
+import com.google.common.base.Throwables;
+import com.google.common.collect.ImmutableMap;
+public class GenericExceptionMapper implements ExceptionMapper<Exception> {
+	public static final Map<Class<? extends Exception>, Response.Status> STATUS_MAP = ImmutableMap
+			.<Class<? extends Exception>, Response.Status> builder()
+			.put(MetadataParseFault.class, Status.BAD_REQUEST)
+			.put(ObjectNotFoundFault.class, Status.NOT_FOUND)
+			.put(AuthFault.class, Status.UNAUTHORIZED)
+			.put(IoFault.class, Status.INTERNAL_SERVER_ERROR)
+			.put(ProtocolNotImplementedFault.class, Status.BAD_REQUEST).build();
+	private static final String HTML_TEMPLATE =
+			"<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n" +
+			"<!DOCTYPE html>\n" +
+			"<html xmlns=\"http://www.w3.org/1999/xhtml\">\n" +
+			"    <head>\n" +
+			"        <title>404 Not Found</title>\n" +
+ "        <style type=\"text/css\">'\n"
+			+
+			"            h1 { border-bottom: 1px solid red; }\n" +
+			"            .details { color: gray; }\n" +
+ "        '</style>\n"
+			+
+			"    </head>\n" +
+			"    <body>\n" +
+			"        <h1>Not Found</h1>\n" +
+			"        <p class=\"message\">{2}</p>\n" +
+			"        <div class=\"details\">\n" +
+			"            <pre>\n" +
+			"{3}\n" +
+			"            </pre>\n" +
+			"        </div>\n" +
+			"    </body>\n" +
+			"</html>";
+	@Override
+	public Response toResponse(final Exception exception) {
+		Status status = STATUS_MAP.get(exception.getClass());
+		if (status == null)
+			status = Status.INTERNAL_SERVER_ERROR;
+		ResponseBuilder builder = Response.status(status);
+		builder.type(MediaType.APPLICATION_XHTML_XML_TYPE);
+		builder.entity(MessageFormat.format(HTML_TEMPLATE,
+				status.getStatusCode(), status.getReasonPhrase(),
+				exception.getLocalizedMessage(),
+				Throwables.getStackTraceAsString(exception)));
+		return builder.build();
+	}
+}