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com.tangosol.coherence.rest.query
Class AbstractQueryEngine

java.lang.Object
com.tangosol.coherence.rest.query.AbstractQueryEngine

All Implemented Interfaces:

QueryEngine

Direct Known Subclasses:

CoherenceQueryLanguageEngine

public abstract class AbstractQueryEngine

extends java.lang.Object

implements QueryEngine

Abstract base class for QueryEngine implementations.

Author:

as 2012.01.19

Nested Class Summary

protected static class

AbstractQueryEngine.ParsedQuery Immutable helper class that wraps both final query string and a map of parameter types, keyed by parameter name.

Field Summary

protected java.util.Map

m_mapParsedQuery Map of cached ParsedQuery instances, keyed by their corresponding final query string.

Constructor Summary

AbstractQueryEngine()

Method Summary

protected java.util.List	convertList(java.util.List listSource, java.lang.Class clzElementType) Convert all elements of the source list into the specified type.
protected java.util.Map	createBindings(java.util.Map mapParams, java.util.Map mapParamTypes) Converts string parameters to their required types.
protected AbstractQueryEngine.ParsedQuery	parseQueryString(java.lang.String sQuery) Parse a query string containing parameter type hints.
protected java.lang.Class	resolveParameterType(java.lang.String sType) Return the Class that corresponds with the given type hint.

Methods inherited from interface com.tangosol.coherence.rest.query.QueryEngine

prepareQuery

Field Detail

m_mapParsedQuery

protected final java.util.Map m_mapParsedQuery

Map of cached ParsedQuery instances, keyed by their corresponding final query string.

Constructor Detail

AbstractQueryEngine

public AbstractQueryEngine()

Method Detail

parseQueryString

protected AbstractQueryEngine.ParsedQuery parseQueryString(java.lang.String sQuery)

Parse a query string containing parameter type hints.

Parameter type hints allow users to specify the type conversion that should be performed on the string value of the parameter defined in the query string portion of the URL before it is bound to the query.

Parameters:

sQuery - a query string to parse, which contains zero or more parameter bindings, possibly with type hints

Returns:

a ParsedQuery instance containing both the original query string with parameter type hints removed, and the map of parameter types keyed by parameter name

resolveParameterType

protected java.lang.Class resolveParameterType(java.lang.String sType)

Return the Class that corresponds with the given type hint.

Parameters:

sType - the type hint

Returns:

the Class that corresponds with the given type hint

createBindings

protected java.util.Map createBindings(java.util.Map mapParams,
                                       java.util.Map mapParamTypes)

Converts string parameters to their required types.

Parameters:

mapParams - a map of string parameter values

mapParamTypes - a map of required parameter types

Returns:

a map of parameters converted to a required type

convertList

protected java.util.List convertList(java.util.List listSource,
                                     java.lang.Class clzElementType)

Convert all elements of the source list into the specified type.

Parameters:

listSource - source list

clzElementType - element type

Returns:

converted list

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