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From: mfranklin <git@git.apache.org>
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Subject: [GitHub] incubator-streams pull request: STREAMS-60, STREAMS-70
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Message-Id: <20140507140732.06108938023@tyr.zones.apache.org>
Date: Wed,  7 May 2014 14:07:32 +0000 (UTC)
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Github user mfranklin commented on a diff in the pull request:

    https://github.com/apache/incubator-streams/pull/12#discussion_r12377982
  
    --- Diff: streams-contrib/streams-processor-json/src/main/java/org/apache/streams/json/JsonPathFilter.java ---
    @@ -0,0 +1,149 @@
    +package org.apache.streams.json;
    +
    +import com.fasterxml.jackson.core.JsonProcessingException;
    +import com.fasterxml.jackson.databind.JsonNode;
    +import com.fasterxml.jackson.databind.ObjectMapper;
    +import com.fasterxml.jackson.databind.node.ArrayNode;
    +import com.fasterxml.jackson.databind.node.ObjectNode;
    +import com.fasterxml.jackson.datatype.jsonorg.JsonOrgModule;
    +import com.google.common.base.Preconditions;
    +import com.google.common.collect.Lists;
    +import com.jayway.jsonpath.JsonPath;
    +import net.minidev.json.JSONArray;
    +import net.minidev.json.JSONObject;
    +import org.apache.commons.lang3.StringUtils;
    +import org.apache.streams.core.StreamsDatum;
    +import org.apache.streams.core.StreamsProcessor;
    +import org.apache.streams.jackson.StreamsJacksonMapper;
    +import org.slf4j.Logger;
    +import org.slf4j.LoggerFactory;
    +
    +import java.io.IOException;
    +import java.util.List;
    +import java.util.Map;
    +
    +/**
    + * Created by sblackmon on 12/10/13.
    + */
    +public class JsonPathFilter implements StreamsProcessor {
    +
    +    public JsonPathFilter() {
    +        System.out.println("creating JsonPathFilter");
    +    }
    +
    +    private final static String STREAMS_ID = "JsonPathFilter";
    +
    +    private final static Logger LOGGER = LoggerFactory.getLogger(JsonPathFilter.class);
    +
    +    private ObjectMapper mapper = new StreamsJacksonMapper();
    +
    +    private String pathExpression;
    +    private JsonPath jsonPath;
    +    private String destNodeName;
    +
    +    @Override
    +    public List<StreamsDatum> process(StreamsDatum entry) {
    +
    +        List<StreamsDatum> result = Lists.newArrayList();
    +
    +        String json = null;
    +
    +        ObjectNode document = null;
    +
    +        LOGGER.debug("{} processing {}", STREAMS_ID);
    +
    +        if( entry.getDocument() instanceof ObjectNode ) {
    +            document = (ObjectNode) entry.getDocument();
    +            try {
    +                json = mapper.writeValueAsString(document);
    +            } catch (JsonProcessingException e) {
    +                e.printStackTrace();
    --- End diff --
    
    Logger


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