org.apache.usergrid.android.sdk.utils.JsonUtils.java Source code

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Here is the source code for org.apache.usergrid.android.sdk.utils.JsonUtils.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.android.sdk.utils;

import java.io.IOException;
import java.util.Map;
import java.util.UUID;

import org.apache.usergrid.android.sdk.exception.ClientException;
import com.fasterxml.jackson.core.JsonGenerationException;
import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.JsonMappingException;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.JsonNodeFactory;

public class JsonUtils {

    static ObjectMapper mapper = new ObjectMapper();

    public static String getStringProperty(Map<String, JsonNode> properties, String name) {
        JsonNode value = properties.get(name);
        if (value != null) {
            return value.asText();
        }
        return null;
    }

    public static void setStringProperty(Map<String, JsonNode> properties, String name, String value) {
        if (value == null) {
            properties.remove(name);
        } else {
            properties.put(name, JsonNodeFactory.instance.textNode(value));
        }
    }

    public static Long getLongProperty(Map<String, JsonNode> properties, String name) {
        JsonNode value = properties.get(name);
        if (value != null) {
            return value.asLong(0);
        }
        return null;
    }

    public static void setLongProperty(Map<String, JsonNode> properties, String name, Long value) {
        if (value == null) {
            properties.remove(name);
        } else {
            properties.put(name, JsonNodeFactory.instance.numberNode(value));
        }
    }

    public static void setFloatProperty(Map<String, JsonNode> properties, String name, Float value) {
        if (value == null) {
            properties.remove(name);
        } else {
            properties.put(name, JsonNodeFactory.instance.numberNode(value));
        }
    }

    public static Boolean getBooleanProperty(Map<String, JsonNode> properties, String name) {
        JsonNode value = properties.get(name);
        if (value != null) {
            return value.asBoolean();
        }
        return false;
    }

    public static void setBooleanProperty(Map<String, JsonNode> properties, String name, Boolean value) {
        if (value == null) {
            properties.remove(name);
        } else {
            properties.put(name, JsonNodeFactory.instance.booleanNode(value));
        }
    }

    public static UUID getUUIDProperty(Map<String, JsonNode> properties, String name) {
        JsonNode value = properties.get(name);
        if (value != null) {
            UUID uuid = null;
            try {
                uuid = UUID.fromString(value.asText());
            } catch (Exception e) {
            }
            return uuid;
        }
        return null;
    }

    public static void setUUIDProperty(Map<String, JsonNode> properties, String name, UUID value) {
        if (value == null) {
            properties.remove(name);
        } else {
            properties.put(name, JsonNodeFactory.instance.textNode(value.toString()));
        }
    }

    public static String toJsonString(Object obj) {
        try {
            return mapper.writeValueAsString(obj);
        } catch (JsonGenerationException e) {
            throw new ClientException("Unable to generate json", e);
        } catch (JsonMappingException e) {
            throw new ClientException("Unable to map json", e);
        } catch (IOException e) {
            throw new ClientException("IO error", e);
        }
    }

    public static <T> T parse(String json, Class<T> c) {
        try {
            return mapper.readValue(json, c);
        } catch (JsonGenerationException e) {
            throw new ClientException("Unable to generate json", e);
        } catch (JsonMappingException e) {
            throw new ClientException("Unable to map json", e);
        } catch (IOException e) {
            throw new ClientException("IO error", e);
        }
    }

    public static JsonNode toJsonNode(Object obj) {
        return mapper.convertValue(obj, JsonNode.class);
    }

    public static <T> T fromJsonNode(JsonNode json, Class<T> c) {
        try {
            JsonParser jp = json.traverse();
            return mapper.readValue(jp, c);
        } catch (JsonGenerationException e) {
            throw new ClientException("Unable to generate json", e);
        } catch (JsonMappingException e) {
            throw new ClientException("Unable to map json", e);
        } catch (IOException e) {
            throw new ClientException("IO error", e);
        }
    }

    public static <T> T getObjectProperty(Map<String, JsonNode> properties, String name, Class<T> c) {
        JsonNode value = properties.get(name);
        if (value != null) {
            return fromJsonNode(value, c);
        }
        return null;
    }

    public static void setObjectProperty(Map<String, JsonNode> properties, String name, Object value) {
        if (value == null) {
            properties.remove(name);
        } else {
            properties.put(name, JsonNodeFactory.instance.textNode(value.toString()));
        }
    }

}