Tilman
112 lines
3.4 KiB
Java
112 lines
3.4 KiB
Java
/* Copyright (c) 2006 Google Inc.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package sample.gbase.cmdline;
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import com.google.api.gbase.client.FeedURLFactory;
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import com.google.api.gbase.client.GoogleBaseService;
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import com.google.api.gbase.client.ServiceError;
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import com.google.api.gbase.client.ServiceErrors;
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import com.google.gdata.util.ServiceException;
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import java.io.IOException;
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/**
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* Utility class that allows creating simple Example Tools.
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*
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* Contains methods for parsing the arguments and for printing errors.
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*/
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public abstract class Example {
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protected static FeedURLFactory urlFactory = FeedURLFactory.getDefault();
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protected static GoogleBaseService service;
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/**
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* Parses the arguments, creates a FeedURLFactory and a GoogleBaseService.
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* @return the remaining arguments
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*/
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public static String[] init(String[] args, String applicationName)
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throws IOException {
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String baseUrl = null;
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int argsIndex = 0;
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while (argsIndex < args.length && args[argsIndex].startsWith("-")) {
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String arg = args[argsIndex];
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argsIndex++;
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if ( argsIndex >= args.length) {
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throw new IllegalArgumentException("Expected a parameter value " +
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"after " + arg);
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}
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String value = args[argsIndex];
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argsIndex++;
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if ("--url".equals(arg)) {
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baseUrl = value;
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} else if("--key".equals(arg)) {
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// This parameter used to contain the developer key.
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// It is still accepted so as not to break scripts that used it, but
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// it is now ignored.
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} else {
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throw new IllegalArgumentException("unknown parameter: " + arg);
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}
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}
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if(baseUrl != null) {
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urlFactory = new FeedURLFactory(baseUrl);
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}
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// service.query does a GET on the url above and parses the result,
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// which is an ATOM feed with some extensions (called the Google Base
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// data API items feed).
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service = new GoogleBaseService(applicationName);
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if (argsIndex > 0) {
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String[] newargs = new String[args.length - argsIndex];
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System.arraycopy(args, argsIndex, newargs, 0, newargs.length);
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args = newargs;
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}
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return args;
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}
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/**
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* Prints an error message returned by the server, if any.
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*
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* @param e an exception that may contain an error message from the server
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*/
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protected static void printServiceException(ServiceException e) {
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System.err.print("Error");
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if (e.getHttpErrorCodeOverride() > 0) {
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System.err.print(e.getHttpErrorCodeOverride());
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}
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System.err.print(": ");
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System.err.println(e.getMessage());
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ServiceErrors errors = new ServiceErrors(e);
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for (ServiceError error: errors.getAllErrors()) {
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String field = error.getField();
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System.err.print(" ");
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if (field != null) {
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System.err.print("in field '");
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System.err.print(field);
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System.err.print("' ");
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}
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System.err.println(error.getReason());
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}
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}
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}
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