Notes:
- You can find information about how to install Thrift in this page: https://thrift.apache.org
- You can find information about the ".thrift" file in this page: https://wiki.apache.org/thrift/Tutorial

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>mtitek.thrift.samples</groupId> <artifactId>mtitek-thrift-samples</artifactId> <version>1.0.0-SNAPSHOT</version> <dependencies> <dependency> <groupId>org.apache.thrift</groupId> <artifactId>libthrift</artifactId> <version>0.9.3</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.thrift.tools</groupId> <artifactId>maven-thrift-plugin</artifactId> <version>0.1.11</version> <executions> <execution> <id>thrift-compile</id> <phase>generate-sources</phase> <goals> <goal>compile</goal> </goals> </execution> </executions> </plugin> <plugin> <groupId>org.codehaus.mojo</groupId> <artifactId>build-helper-maven-plugin</artifactId> <version>1.12</version> <executions> <execution> <id>build-helper-add-source</id> <phase>generate-sources</phase> <goals> <goal>add-source</goal> </goals> <configuration> <sources> <source>${project.build.directory}/generated-sources/thrift/</source> </sources> </configuration> </execution> </executions> </plugin> </plugins> </build> </project>

namespace java mtitek.thrift.samples /* * Constraint. */ union Constraint { 1: required string primaryKey; 2: required string foreignKey; 3: required string uniqueKey; } /* * Column. */ struct Column { 1: required string columnName; 2: required string dataType; 3: required bool nullable; 4: optional map<string, Constraint> constraints; } /* * Table. */ struct Table { 1: required string tableName; 2: optional list<Column> columns; } /* * Schema. */ struct Schema { 1: required string schemaName; 2: optional list<Table> tables; }

This sample class uses the generated thrift java classes.

If you build your code using the command "mvn package", Thrift will compile the "sample.thrift" file and generate the java classes:
► target/generated-sources/thrift/mtitek.thrift.samples.Schema
► target/generated-sources/thrift/mtitek.thrift.samples.Table
► target/generated-sources/thrift/mtitek.thrift.samples.Column
► target/generated-sources/thrift/mtitek.thrift.samples.Constraint

package mtitek.thrift.samples; import java.util.Map; public class SampleThrift { public static void main(String[] args) { final Schema schema = initSchema(); System.out.println("Schema Name: " + schema.getSchemaName()); if (schema.isSetTables()) { for (final Table table : schema.getTables()) { System.out.println("Table Name: " + table.getTableName()); if (table.isSetTableName()) { for (final Column column : table.getColumns()) { System.out.println("Column Name: " + column.getColumnName()); System.out.println("Column Data Type: " + column.getDataType()); System.out.println("Column isNullable: " + column.isNullable()); if (column.isSetConstraints()) { for (final Map.Entry<String, Constraint> entry : column.getConstraints().entrySet()) { final String constraintName = entry.getKey(); final Constraint constraint = entry.getValue(); if (constraint.isSetPrimaryKey()) { System.out.println( "Constraint: {" + constraintName + ":" + constraint.getPrimaryKey() + "}"); } if (constraint.isSetForeignKey()) { System.out.println( "Constraint: {" + constraintName + ":" + constraint.getForeignKey() + "}"); } if (constraint.isSetUniqueKey()) { System.out.println( "Constraint: {" + constraintName + ":" + constraint.getUniqueKey() + "}"); } } } } } } } } private static Schema initSchema() { final Constraint constraint1 = new Constraint(); constraint1.setPrimaryKey("primaryKey1"); final Constraint constraint2 = new Constraint(); constraint2.setForeignKey("foreignKey1"); final Constraint constraint3 = new Constraint(); constraint3.setUniqueKey("uniqueKey1"); final Column column = new Column(); column.setColumnName("column1"); column.setDataType("dataType1"); column.setNullable(Boolean.TRUE); column.putToConstraints("constraint1", constraint1); column.putToConstraints("constraint2", constraint2); column.putToConstraints("constraint3", constraint3); final Table table = new Table(); table.setTableName("table1"); table.addToColumns(column); final Schema schema = new Schema(); schema.setSchemaName("schema1"); schema.addToTables(table); return schema; } }