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| <div class="subTitle">org.apache.pirk.responder.wideskies.standalone</div> |
| <h2 title="Class Responder" class="title">Class Responder</h2> |
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| <ul class="inheritance"> |
| <li>java.lang.Object</li> |
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| <pre>public class <span class="strong">Responder</span> |
| extends java.lang.Object</pre> |
| <div class="block">Class to perform stand alone responder functionalities |
| <p> |
| Used primarily for testing, although it can be used anywhere in standalone mode |
| <p> |
| Does not bound the number of hits that can be returned per selector |
| <p> |
| Does not use the DataFilter class -- assumes all filtering happens before calling addDataElement() |
| <p> |
| NOTE: Only uses in expLookupTables that are contained in the Query object, not in hdfs as this is a standalone responder</div> |
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| <td class="colOne"><code><strong><a href="../../../../../../org/apache/pirk/responder/wideskies/standalone/Responder.html#Responder(org.apache.pirk.query.wideskies.Query)">Responder</a></strong>(<a href="../../../../../../org/apache/pirk/query/wideskies/Query.html" title="class in org.apache.pirk.query.wideskies">Query</a> queryInput)</code> </td> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/responder/wideskies/standalone/Responder.html#addDataElement(java.lang.String,%20org.json.simple.JSONObject)">addDataElement</a></strong>(java.lang.String selector, |
| org.json.simple.JSONObject jsonData)</code> |
| <div class="block">Method to add a data element associated with the given selector to the Response</div> |
| </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/responder/wideskies/standalone/Responder.html#computeStandaloneResponse()">computeStandaloneResponse</a></strong>()</code> |
| <div class="block">Method to compute the standalone response</div> |
| </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>java.util.TreeMap<java.lang.Integer,java.math.BigInteger></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/responder/wideskies/standalone/Responder.html#getColumns()">getColumns</a></strong>()</code> </td> |
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| <tr class="rowColor"> |
| <td class="colFirst"><code><a href="../../../../../../org/apache/pirk/response/wideskies/Response.html" title="class in org.apache.pirk.response.wideskies">Response</a></code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/responder/wideskies/standalone/Responder.html#getResponse()">getResponse</a></strong>()</code> </td> |
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| <td class="colFirst"><code>void</code></td> |
| <td class="colLast"><code><strong><a href="../../../../../../org/apache/pirk/responder/wideskies/standalone/Responder.html#setResponseElements()">setResponseElements</a></strong>()</code> </td> |
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| <h4>Responder</h4> |
| <pre>public Responder(<a href="../../../../../../org/apache/pirk/query/wideskies/Query.html" title="class in org.apache.pirk.query.wideskies">Query</a> queryInput)</pre> |
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| <h4>getResponse</h4> |
| <pre>public <a href="../../../../../../org/apache/pirk/response/wideskies/Response.html" title="class in org.apache.pirk.response.wideskies">Response</a> getResponse()</pre> |
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| <pre>public java.util.TreeMap<java.lang.Integer,java.math.BigInteger> getColumns()</pre> |
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| <a name="computeStandaloneResponse()"> |
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| <h4>computeStandaloneResponse</h4> |
| <pre>public void computeStandaloneResponse() |
| throws java.io.IOException</pre> |
| <div class="block">Method to compute the standalone response |
| <p> |
| Assumes that the input data is a single file in the local filesystem and is fully qualified</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code>java.io.IOException</code></dd></dl> |
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| <h4>addDataElement</h4> |
| <pre>public void addDataElement(java.lang.String selector, |
| org.json.simple.JSONObject jsonData) |
| throws java.lang.Exception</pre> |
| <div class="block">Method to add a data element associated with the given selector to the Response |
| <p> |
| Assumes that the dataMap contains the data in the schema specified |
| <p> |
| Initialize Paillier ciphertext values Y_i to 1 (as needed -- column values as the # of hits grows) |
| <p> |
| Initialize 2^hashBitSize counters: c_t = 0, 0 <= t <= (2^hashBitSize - 1) |
| <p> |
| For selector T: |
| <p> |
| For data element D, split D into partitions of size partitionSize-many bits: |
| <p> |
| D = D_0 || ... ||D_{\ceil{bitLength(D)/partitionSize} - 1)} |
| <p> |
| Compute H_k(T); let E_T = query.getQueryElement(H_k(T)). |
| <p> |
| For each data partition D_i: |
| <p> |
| Compute/Update: |
| <p> |
| Y_{i+c_{H_k(T)}} = (Y_{i+c_{H_k(T)}} * ((E_T)^{D_i} mod N^2)) mod N^2 ++c_{H_k(T)}</div> |
| <dl><dt><span class="strong">Throws:</span></dt> |
| <dd><code>java.lang.Exception</code></dd></dl> |
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| <pre>public void setResponseElements()</pre> |
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