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

protected String	expression The textual expression of the query.
protected Map<String,String>	parameters Query parameters .

Constructor Summary

AbstractQuery()

Method Summary

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.