org.apache.usergrid.services.ServicePayload.java Source code

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Here is the source code for org.apache.usergrid.services.ServicePayload.java

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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License 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 org.apache.usergrid.services;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.UUID;

import org.apache.usergrid.utils.JsonUtils;

import org.apache.commons.collections.iterators.EmptyIterator;
import org.apache.commons.collections.iterators.SingletonListIterator;

import static org.apache.usergrid.utils.JsonUtils.normalizeJsonTree;

public class ServicePayload {

    private final Map<String, Object> properties;
    private final List<Map<String, Object>> batch;
    private final List<UUID> list;

    public ServicePayload() {
        properties = new LinkedHashMap<String, Object>();
        batch = null;
        list = null;
    }

    private ServicePayload(Map<String, Object> properties, List<Map<String, Object>> batch, List<UUID> list) {
        this.properties = properties;
        this.batch = batch;
        this.list = list;
    }

    public static ServicePayload payload(Map<String, Object> properties) {
        return new ServicePayload(properties, null, null);
    }

    public static ServicePayload batchPayload(List<Map<String, Object>> batch) {
        return new ServicePayload(null, batch, null);
    }

    public static ServicePayload idListPayload(List<UUID> list) {
        return new ServicePayload(null, null, list);
    }

    @SuppressWarnings("unchecked")
    public static ServicePayload jsonPayload(Object json) {
        ServicePayload payload = null;
        json = normalizeJsonTree(json);
        if (json instanceof Map) {
            Map<String, Object> jsonMap = (Map<String, Object>) json;
            payload = payload(jsonMap);
        } else if (json instanceof List) {
            List<?> jsonList = (List<?>) json;
            if (jsonList.size() > 0) {
                if (jsonList.get(0) instanceof UUID) {
                    payload = idListPayload((List<UUID>) json);
                } else if (jsonList.get(0) instanceof Map) {
                    payload = ServicePayload.batchPayload((List<Map<String, Object>>) jsonList);
                }
            }
        }
        return payload;
    }

    public static ServicePayload stringPayload(String str) {
        return jsonPayload(JsonUtils.parse(str));
    }

    public boolean isBatch() {
        return batch != null;
    }

    public boolean isList() {
        return list != null;
    }

    public Map<String, Object> getProperties() {
        if (properties != null) {
            return properties;
        }
        if ((batch != null) && (batch.size() > 0)) {
            return batch.get(0);
        }
        return null;
    }

    public Object getProperty(String property) {
        Map<String, Object> p = getProperties();
        if (p == null) {
            return null;
        }
        return p.get(property);
    }

    public void setProperty(String property, Object value) {
        Map<String, Object> p = getProperties();

        if (p == null) {
            throw new NullPointerException("No payload exists, cannot add properties to it");
        }

        p.put(property, value);
    }

    public String getStringProperty(String property) {
        Object obj = getProperty(property);
        if (obj instanceof String) {
            return (String) obj;
        }
        return null;
    }

    public Long getLongProperty(String property) {
        Object obj = getProperty(property);

        if (obj instanceof Long) {
            return (Long) obj;
        }

        return null;
    }

    public List<Map<String, Object>> getBatchProperties() {
        if (batch != null) {
            return batch;
        }
        if (properties != null) {
            List<Map<String, Object>> l = new ArrayList<Map<String, Object>>(1);
            l.add(properties);
            return l;
        }
        return null;
    }

    public List<UUID> getIdList() {
        return list;
    }

    @Override
    public String toString() {
        if (batch != null) {
            return JsonUtils.mapToJsonString(batch);
        } else if (list != null) {
            return JsonUtils.mapToJsonString(list);
        }
        return JsonUtils.mapToJsonString(properties);
    }

    @SuppressWarnings("unchecked")
    public Iterator<Map<String, Object>> payloadIterator() {
        if (isBatch()) {
            return batch.iterator();
        }
        if (properties != null) {
            return new SingletonListIterator(properties);
        }
        return EmptyIterator.INSTANCE;
    }
}