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| <h2 title="Class EncodedSchemaPathSet" class="title">Class EncodedSchemaPathSet</h2> |
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| <li>org.apache.drill.exec.util.EncodedSchemaPathSet</li> |
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| <pre>public class <span class="typeNameLabel">EncodedSchemaPathSet</span> |
| extends <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</a></pre> |
| <div class="block">This class provided utility methods to encode and decode a set of user specified |
| SchemaPaths to a set of encoded SchemaPaths with the following properties. |
| <ol> |
| <li>Valid Drill identifier as per its grammar with only one, root name segment. |
| <li>A single identifier can not exceed 1024 characters in length. |
| </ol> |
| <p> |
| Format of the encoded SchemaPath: |
| <blockquote><pre>$$ENC\d\dlt;base32 encoded input paths></pre></blockquote> |
| <p> |
| We use Base-32 over Base-64 because the later's charset includes '\' and '+'.</div> |
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| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#ENCODED_STAR_COLUMN">ENCODED_STAR_COLUMN</a></span></code> </td> |
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| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#EncodedSchemaPathSet--">EncodedSchemaPathSet</a></span>()</code> </td> |
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| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a>></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#decode-java.util.Collection-">decode</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a>> encodedPaths)</code> |
| <div class="block">Returns the decoded Collection of SchemaPath from the input which |
| may contain a mix of encoded and non-encoded SchemaPaths.</div> |
| </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#decode-java.lang.String...-">decode</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... encodedPaths)</code> |
| <div class="block">Returns the decoded array of SchemaPath strings from the input which |
| may contain a mix of encoded and non-encoded SchemaPaths.</div> |
| </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[]</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#encode-java.lang.String...-">encode</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... schemaPaths)</code> |
| <div class="block">Returns the encoded array of SchemaPath identifiers from the input array of SchemaPath.</div> |
| </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#isEncodedSchemaPath-org.apache.drill.common.expression.SchemaPath-">isEncodedSchemaPath</a></span>(<a href="../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a> schemaPath)</code> </td> |
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| <td class="colFirst"><code>static boolean</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/drill/exec/util/EncodedSchemaPathSet.html#isEncodedSchemaPath-java.lang.String-">isEncodedSchemaPath</a></span>(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> schemaPath)</code> </td> |
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| <h4>EncodedSchemaPathSet</h4> |
| <pre>public EncodedSchemaPathSet()</pre> |
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| <h4>encode</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[] encode(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... schemaPaths)</pre> |
| <div class="block">Returns the encoded array of SchemaPath identifiers from the input array of SchemaPath. |
| <p> |
| The returned identifiers have the following properties: |
| <ul> |
| <li>Each SchemaPath identifier in the array has only one single root NameSegment.</li> |
| <li>Maximum length of each such identifier is equal to the maximum length of Drill identifier (currently 1024).</li> |
| </ul> |
| <p> |
| We take advantage of the fact that Java's modified utf-8 encoding can never contain |
| embedded null byte.</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a>http://docs.oracle.com/javase/8/docs/api/java/io/DataInput.html#modified-utf-8</a></dd> |
| </dl> |
| </li> |
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| <h4>isEncodedSchemaPath</h4> |
| <pre>public static boolean isEncodedSchemaPath(<a href="../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a> schemaPath)</pre> |
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| <h4>isEncodedSchemaPath</h4> |
| <pre>public static boolean isEncodedSchemaPath(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> schemaPath)</pre> |
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| <h4>decode</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a>> decode(<a href="https://docs.oracle.com/javase/8/docs/api/java/util/Collection.html?is-external=true" title="class or interface in java.util">Collection</a><<a href="../../../../../org/apache/drill/common/expression/SchemaPath.html" title="class in org.apache.drill.common.expression">SchemaPath</a>> encodedPaths)</pre> |
| <div class="block">Returns the decoded Collection of SchemaPath from the input which |
| may contain a mix of encoded and non-encoded SchemaPaths. |
| <p> |
| The size of returned Collection is always equal to or greater than the |
| input array. |
| <p> |
| The non-encoded SchemaPaths are collated in the beginning to the returned |
| array, in the same order as that of the input array.</div> |
| </li> |
| </ul> |
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| <h4>decode</h4> |
| <pre>public static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>[] decode(<a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a>... encodedPaths)</pre> |
| <div class="block">Returns the decoded array of SchemaPath strings from the input which |
| may contain a mix of encoded and non-encoded SchemaPaths. |
| <p> |
| The size of returned array is always equal to or greater than the |
| input array. |
| <p> |
| The non-encoded SchemaPaths are collated in the beginning to the returned |
| array, in the same order as that of the input array.</div> |
| </li> |
| </ul> |
| </li> |
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