Example usage for org.apache.cassandra.utils UUIDGen getTimeUUIDBytes

Introduction

In this page you can find the example usage for org.apache.cassandra.utils UUIDGen getTimeUUIDBytes.

Prototype

public static byte[] getTimeUUIDBytes() 

Source Link

Document

Returns a 16 byte representation of a type 1 UUID (a time-based UUID), based on the current system time.

Usage

From source file:com.perpetumobile.bit.orm.cassandra.CliMain.java

License:Apache License

/**
 * Used to convert value (function argument, string) into byte[]
 * @param functionCall - tree representing function call ^(FUNCTION_CALL function_name value)
 * @param columnFamily - column family definition (CfDef)
 * @param columnName   - column name as byte[] (used to update CfDef)
 * @param withUpdate   - also updates column family metadata for given column
 * @return byte[] - string value as byte[]
 *//*from w w  w.  j  a  va 2s . c o  m*/
private ByteBuffer convertValueByFunction(Tree functionCall, CfDef columnFamily, ByteBuffer columnName,
        boolean withUpdate) {
    String functionName = functionCall.getChild(0).getText();
    Tree argumentTree = functionCall.getChild(1);
    String functionArg = (argumentTree == null) ? "" : CliUtils.unescapeSQLString(argumentTree.getText());
    AbstractType<?> validator = getTypeByFunction(functionName);

    try {

        ByteBuffer value;

        if (functionArg.isEmpty()) {
            if (validator instanceof TimeUUIDType) {
                value = ByteBuffer.wrap(UUIDGen.getTimeUUIDBytes());
            } else if (validator instanceof LexicalUUIDType) {
                value = ByteBuffer.wrap(UUIDGen.decompose(UUID.randomUUID()));
            } else if (validator instanceof BytesType) {
                value = ByteBuffer.wrap(new byte[0]);
            } else {
                throw new RuntimeException(
                        String.format("Argument for '%s' could not be empty.", functionName));
            }
        } else {
            value = getBytesAccordingToType(functionArg, validator);
        }

        // performing ColumnDef local validator update
        if (withUpdate) {
            updateColumnMetaData(columnFamily, columnName, validator.toString());
        }

        return value;
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

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