com.amazon.aws.demo.anonymous.sdb.SimpleDB.java Source code

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Here is the source code for com.amazon.aws.demo.anonymous.sdb.SimpleDB.java

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/*
 * Copyright 2010-2012 Amazon.com, Inc. or its affiliates. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * You may not use this file except in compliance with the License.
 * A copy of the License is located at
 *
 *  http://aws.amazon.com/apache2.0
 *
 * or in the "license" file accompanying this file. This file is distributed
 * on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
 * express or implied. See the License for the specific language governing
 * permissions and limitations under the License.
 */
package com.amazon.aws.demo.anonymous.sdb;

import android.util.Log;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;

import com.amazon.aws.demo.anonymous.AWSAndroidDemoTVM;
import com.amazonaws.services.simpledb.AmazonSimpleDBClient;
import com.amazonaws.services.simpledb.model.Attribute;
import com.amazonaws.services.simpledb.model.CreateDomainRequest;
import com.amazonaws.services.simpledb.model.DeleteAttributesRequest;
import com.amazonaws.services.simpledb.model.DeleteDomainRequest;
import com.amazonaws.services.simpledb.model.GetAttributesRequest;
import com.amazonaws.services.simpledb.model.GetAttributesResult;
import com.amazonaws.services.simpledb.model.Item;
import com.amazonaws.services.simpledb.model.ListDomainsRequest;
import com.amazonaws.services.simpledb.model.ListDomainsResult;
import com.amazonaws.services.simpledb.model.PutAttributesRequest;
import com.amazonaws.services.simpledb.model.ReplaceableAttribute;
import com.amazonaws.services.simpledb.model.SelectRequest;

public class SimpleDB {

    private static String nextToken = null;
    private static int prevNumDomains = 0;
    public static final String DOMAIN_NAME = "_domain_name";

    public static AmazonSimpleDBClient getInstance() {
        return AWSAndroidDemoTVM.clientManager.sdb();
    }

    public static List<String> getDomainNames() {
        return getInstance().listDomains().getDomainNames();
    }

    public static List<String> getDomainNames(int numDomains) {
        prevNumDomains = numDomains;
        return getDomainNames(numDomains, null);
    }

    private static List<String> getDomainNames(int numDomains, String nextToken) {
        ListDomainsRequest req = new ListDomainsRequest();
        req.setMaxNumberOfDomains(numDomains);
        if (nextToken != null)
            req.setNextToken(nextToken);
        ListDomainsResult result = getInstance().listDomains(req);
        List domains = result.getDomainNames();
        SimpleDB.nextToken = result.getNextToken();
        return domains;
    }

    public static List<String> getMoreDomainNames() {
        if (nextToken == null) {
            return new ArrayList<String>();
        } else {
            return getDomainNames(prevNumDomains, nextToken);
        }

    }

    public static void createDomain(String domainName) {
        getInstance().createDomain(new CreateDomainRequest(domainName));
    }

    public static void deleteDomain(String domainName) {
        getInstance().deleteDomain(new DeleteDomainRequest(domainName));
    }

    public static void createItem(String domainName, String itemName) {
        List<ReplaceableAttribute> attributes = new ArrayList<ReplaceableAttribute>(1);
        attributes.add(new ReplaceableAttribute().withName("Name").withValue("Value"));
        getInstance().putAttributes(new PutAttributesRequest(domainName, itemName, attributes));
    }

    public static void createAttributeForItem(String domainName, String itemName, String attributeName,
            String attributeValue) {
        List<ReplaceableAttribute> attributes = new ArrayList<ReplaceableAttribute>(1);
        attributes.add(
                new ReplaceableAttribute().withName(attributeName).withValue(attributeValue).withReplace(true));
        getInstance().putAttributes(new PutAttributesRequest(domainName, itemName, attributes));
    }

    public static String[] getItemNamesForDomain(String domainName) {
        SelectRequest selectRequest = new SelectRequest("select itemName() from `" + domainName + "`")
                .withConsistentRead(true);
        List items = getInstance().select(selectRequest).getItems();

        String[] itemNames = new String[items.size()];
        for (int i = 0; i < items.size(); i++) {
            itemNames[i] = ((Item) items.get(i)).getName();
        }

        return itemNames;
    }

    public static HashMap<String, String> getAttributesForItem(String domainName, String itemName) {
        GetAttributesRequest getRequest = new GetAttributesRequest(domainName, itemName).withConsistentRead(true);
        GetAttributesResult getResult = getInstance().getAttributes(getRequest);

        HashMap<String, String> attributes = new HashMap<String, String>(30);
        for (Object attribute : getResult.getAttributes()) {
            String name = ((Attribute) attribute).getName();
            String value = ((Attribute) attribute).getValue();

            attributes.put(name, value);
        }

        return attributes;
    }

    public static void updateAttributesForItem(String domainName, String itemName,
            HashMap<String, String> attributes) {
        List<ReplaceableAttribute> replaceableAttributes = new ArrayList<ReplaceableAttribute>(attributes.size());

        for (String attributeName : attributes.keySet()) {
            replaceableAttributes.add(new ReplaceableAttribute().withName(attributeName)
                    .withValue(attributes.get(attributeName)).withReplace(true));
        }

        getInstance().putAttributes(new PutAttributesRequest(domainName, itemName, replaceableAttributes));
    }

    public static void deleteItem(String domainName, String itemName) {
        getInstance().deleteAttributes(new DeleteAttributesRequest(domainName, itemName));
    }

    public static void deleteItemAttribute(String domainName, String itemName, String attributeName) {
        getInstance().deleteAttributes(new DeleteAttributesRequest(domainName, itemName)
                .withAttributes(new Attribute[] { new Attribute().withName(attributeName) }));
    }

}