org.gcube.common.core.informationsystem.client.impl

Class AbstractQuery<RESULT>

java.lang.Object

org.gcube.common.core.informationsystem.client.impl.AbstractQuery<RESULT>

All Implemented Interfaces:

ISQuery<RESULT>

public abstract class AbstractQuery<RESULT>
extends Object
implements ISQuery<RESULT>

Abstract implementation of ISQuery.

Author:

Andrea Manzi (CNR), Fabio Simeoni (University of Strathclyde)

Field Summary

Fields

Modifier and Type	Field and Description
protected String	expression The textual expression of the query.
protected Map<String,String>	parameters Query parameters .

Constructor Summary

Constructors

Constructor and Description
AbstractQuery()

Method Summary

Methods

Modifier and Type	Method and Description
void	addParameters(QueryParameter... parameters) Add one or more parameters to the query.
String	getExpression() Returns the textual expression of the query.
long	getTTL() Returns the time-to-live of the results of the query.
protected boolean	isWellFormed() Override to indicate whether the query is well-formed.
protected abstract RESULT	parseResult(String unparsedResult) Override to return a query result from its textual serialisation.
void	setExpression(String exp) Sets the textual expression of the query.
void	setTTL(long ttl) Sets the time-to-live of the results of the query.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

parameters

protected Map<String,String> parameters

Query parameters .

expression

protected String expression

The textual expression of the query.

Constructor Detail

AbstractQuery

public AbstractQuery()

Method Detail

getTTL

public long getTTL()

Returns the time-to-live of the results of the query.

Specified by:

getTTL in interface ISQuery<RESULT>

Returns:

the time-to-live.

getExpression

public String getExpression()

Returns the textual expression of the query.

Specified by:

getExpression in interface ISQuery<RESULT>

Returns:

the expression.

setTTL

public void setTTL(long ttl)

Sets the time-to-live of the results of the query.

Specified by:

setTTL in interface ISQuery<RESULT>

Parameters:

ttl - the time-to-live.

setExpression

public void setExpression(String exp)

Sets the textual expression of the query.

Specified by:

setExpression in interface ISQuery<RESULT>

Parameters:

exp - the expression.

addParameters

public void addParameters(QueryParameter... parameters)

Add one or more parameters to the query.

Parameters:

parameters - the parameters.

isWellFormed

protected boolean isWellFormed()

Override to indicate whether the query is well-formed. By default, it simply checks that the query expression is non-null.

Returns:

true if the query is well-formed, false otherwise.

parseResult

protected abstract RESULT parseResult(String unparsedResult)
                               throws ISClient.ISMalformedResultException

Override to return a query result from its textual serialisation.

Parameters:

unparsedResult - the textual representation.

Returns:

the result.

Throws:

ISClient.ISMalformedResultException - if the result cannot be deserialised.