Package com.norconex.crawler.core.doc.operations.checksum

Class AbstractMetadataChecksummer<T extends BaseChecksummerConfig>

java.lang.Object

com.norconex.crawler.core.doc.operations.checksum.AbstractMetadataChecksummer<T>

Type Parameters:

T - configurable type

All Implemented Interfaces:

Configurable<T>, MetadataChecksummer

Direct Known Subclasses:

FsMetadataChecksummer, GenericMetadataChecksummer, LastModifiedMetadataChecksummer

public abstract class AbstractMetadataChecksummer<T extends BaseChecksummerConfig>
extends Object
implements MetadataChecksummer, Configurable<T>

Abstract implementation of MetadataChecksummer giving the option to keep the generated checksum. The checksum can be stored in a target field name specified. If no target field name is specified, it stores it under the metadata field name CrawlerDocMetaConstants.CHECKSUM_METADATA.

Implementors do not need to store the checksum themselves, this abstract class does it.

toField is ignored unless the keep attribute is set to true.

Field Summary

Fields inherited from interface com.norconex.commons.lang.config.Configurable

PROPERTY

Constructor Summary

Constructors

Constructor	Description
AbstractMetadataChecksummer()

Method Summary

Modifier and Type	Method	Description
protected boolean	canEqual(Object other)
final String	createMetadataChecksum(Properties metadata)	Creates a metadata checksum.
protected abstract String	doCreateMetaChecksum(Properties metadata)
boolean	equals(Object o)
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface com.norconex.commons.lang.config.Configurable

getConfiguration

Constructor Details

AbstractMetadataChecksummer

public AbstractMetadataChecksummer()

Method Details

createMetadataChecksum

public final String createMetadataChecksum(Properties metadata)

Description copied from interface: MetadataChecksummer

Creates a metadata checksum.

Specified by:

createMetadataChecksum in interface MetadataChecksummer

Parameters:

metadata - all metadata values

Returns:

a checksum value

doCreateMetaChecksum

protected abstract String doCreateMetaChecksum(Properties metadata)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

canEqual

protected boolean canEqual(Object other)

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object