Synnefo » Pithos Web Client

package gr.grnet.pithos.web.client;

import com.google.gwt.http.client.Header;

import com.google.gwt.http.client.RequestBuilder;

import com.google.gwt.http.client.Response;

import com.google.gwt.json.client.JSONArray;

import com.google.gwt.json.client.JSONString;

import java.util.*;

/**

 * Helper methods.

 */

public final class Helpers {

    private Helpers() {}

    public static boolean isEmptySafe(CharSequence s) {

        return s == null || s.length() == 0;

    }

    public static <K, V> HashMap<K, V> copyHashMap(HashMap<K, V> map) {

        assert map != null;

        return new HashMap<K, V>(map);

    }

    public static <T> List<T> safeList(List<T> list) {

        if(list == null) {

            return new ArrayList<T>();

        }

        return list;

    }

    public static <T> List<T> toList(T ...items) {

        final List<T> list = new ArrayList<T>();

        Collections.addAll(list, items);

        return list;

    }

    public static JSONArray listToJSONArray(List<String> list) {

        final JSONArray jsonArray = new JSONArray();

        if(list == null) {

            return jsonArray;

        }

        for(int i = 0; i < list.size(); i++) {

            final JSONString jsonString = new JSONString(list.get(i));

            jsonArray.set(i, jsonString);

        }

        return jsonArray;

    }

    public static String stripTrailing(String s, String trailing) {

        while(s.endsWith(trailing)) {

            s = s.substring(0, s.length() - trailing.length());

        }

        return s;

    }

    public static String upToIncludingLastPart(String s, String part) {

        int index = s.lastIndexOf(part);

        if(index == -1) {

            return s;

        }

        return s.substring(0, index + part.length());

    }

    public static void setHeaders(RequestBuilder builder, Map<String, String> headers) {

        for (String headerName : headers.keySet()) {

            final String headerValue = headers.get(headerName);

            builder.setHeader(headerName, headerValue);

            if(Pithos.IsDetailedHTTPLOGEnabled) {

                Pithos.LOG("  ==> ", headerName, ": ", headerValue);

            }

        }

    }

    public static void LOGResponse(Response response) {

        if(Pithos.IsDetailedHTTPLOGEnabled) {

            try {

                final int statusCode = response.getStatusCode();

                final String statusText = response.getStatusText();

                Pithos.LOG("  ", statusCode, " ", statusText);

                final String body = response.getText();

                if(body != null && body.trim().length() > 0) {

                    final String s = body.trim().substring(0, 120);

                    Pithos.LOG(body, body.length() <= 120 ? "" : " ...");

                }

                final Header[] headers = response.getHeaders();

                for(Header header : headers) {

                    final String name = header.getName();

                    final String value = header.getValue();

                    Pithos.LOG("  <== ", name, ": ", value);

                }

            }

            catch(Exception e) {

                Pithos.LOG("ERROR trying to log response", e);

            }

        }

    }

}