com.novartis.opensource.yada.format.AbstractResponse Maven / Gradle / Ivy
/**
* Copyright 2016 Novartis Institutes for BioMedical Research Inc.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
*
*/
package com.novartis.opensource.yada.format;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import org.apache.log4j.Logger;
import org.json.JSONObject;
import com.novartis.opensource.yada.Parser;
import com.novartis.opensource.yada.YADAQuery;
import com.novartis.opensource.yada.YADAQueryConfigurationException;
import com.novartis.opensource.yada.YADAQueryResult;
import com.novartis.opensource.yada.YADARequest;
import com.novartis.opensource.yada.YADARequestException;
/**
* The default implementation of the {@link Response} interface,
*
* @author David Varon
*
*/
public abstract class AbstractResponse implements Response
{
/**
* Local logger handle
*/
private static Logger l = Logger.getLogger(AbstractResponse.class);
/**
* Constant with value equal to: {@value}
*/
public final static String VERSION = "version";
/**
* Constant with value equal to: {@value}
*/
public final static String RESULTSETS = "RESULTSETS";
/**
* Constant with value equal to: {@value}
*/
public final static String RESULTSET = "RESULTSET";
/**
* Constant with value equal to: {@value}
*/
public final static String ROWS = "ROWS";
/**
* Constant with value equal to: {@value}
*/
public final static String RECORDS = "records";
/**
* Constant with value equal to: {@value}
*/
public final static String QNAME = "qname";
/**
* Constant with value equal to: {@value}
*/
public final static String TOTAL = "total";
/**
* Constant with value equal to: {@value}
*/
public final static String PAGE = "page";
/**
* Constant with value equal to: {@value}
*/
public final static String FORMAT_PKG = "com.novartis.opensource.yada.format.";
/**
* Constant with value equal to: {@value}
* @since 6.1.0
*/
public final static String DELIMITED = "Delimited";
/**
* Constant with value equal to: {@value}
* @since 6.1.0
*/
public final static String CONVERTER = "Converter";
/**
* Constant with value equal to: {@value}
* @since 6.1.0
*/
public final static String REST_RESULT = "RESTResult";
/**
* Constant with value equal to: {@value}
* @since 6.1.0
*/
public final static String RESULTSET_RESULT = "ResultSetResult";
/**
* Constant with value equal to: {@value}
* @since 6.1.0
*/
public final static String SOAP_RESULT = "SOAPResult";
/**
* Constant with value equal to: {@value}
* @since 6.1.0
*/
public final static String FILESYSTEM_RESULT = "FileSystemResult";
/**
* The array of result sets to be included in the response
*/
protected YADAQueryResult[] yadaQueryResults;
/**
* The current result set being processed
*/
protected YADAQueryResult yqr;
/**
* Default constructor
*/
public AbstractResponse()
{
}
/**
* Default implementation just returns itself.
* @throws YADAQueryConfigurationException
* @see com.novartis.opensource.yada.format.Response#compose(com.novartis.opensource.yada.YADAQueryResult[])
*/
@Override
public Response compose(YADAQueryResult[] yqrs)
throws YADAResponseException, YADAConverterException, YADAQueryConfigurationException
{
return this;
}
/**
* Default implementation just returns itself.
* @see com.novartis.opensource.yada.format.Response#create()
*/
@Override
public Response create() throws YADAResponseException,
YADAConverterException
{
return this;
}
/**
* Default implementation just returns itself.
* @see com.novartis.opensource.yada.format.Response#append(java.lang.String)
*/
@Override
public Response append(String s) throws YADAResponseException,
YADAConverterException
{
return this;
}
/**
* Default implementation just returns itself.
* @see com.novartis.opensource.yada.format.Response#append(java.lang.Integer)
*/
@Override
public Response append(Integer i) throws YADAResponseException,
YADAConverterException
{
return this;
}
/**
* Default implementation just returns itself.
* @throws YADAQueryConfigurationException
* @see com.novartis.opensource.yada.format.Response#append(java.lang.Object)
*/
@Override
public Response append(Object o) throws YADAResponseException,
YADAConverterException, YADAQueryConfigurationException
{
return this;
}
/**
* Default implementation just returns itself.
* @see com.novartis.opensource.yada.format.Response#toString(boolean)
*/
@Override
public String toString(boolean prettyPrint) throws YADAResponseException
{
return this.toString();
}
/**
* This method returns the appropriate converter {@link Converter} by looking first at the {@link YADARequest#PS_CONVERTER}
* parmater, if no class is set, or the class provided cannot be instantiated, the default converter is set
* using {@link #getDefaultConverter(YADAQueryResult)}
* @param yqr the result container
* @return the appropriate Converter object
* @throws YADARequestException when the default converter cannot be instantiated
* @throws YADAConverterException when result reformatting fails
* @throws YADAQueryConfigurationException
*/
protected Converter getConverter(YADAQueryResult yqr) throws YADARequestException, YADAConverterException, YADAQueryConfigurationException
{
String converterClass = yqr.getYADAQueryParamValue(YADARequest.PS_CONVERTER);
Converter converter;
if( converterClass != null && !"".equals(converterClass))
{
Constructor c;
Class clazz;
try
{
clazz = Class.forName(converterClass);
c = clazz.getConstructor(YADAQueryResult.class);
c.setAccessible(true);
converter = (Converter) c.newInstance(yqr);
}
catch (Exception e)
{
l.warn("The specified class ["+converterClass+"] could not be instantiated. Trying FQCN.");
try
{
converterClass = FORMAT_PKG+converterClass;
clazz = Class.forName(converterClass);
c = clazz.getConstructor(YADAQueryResult.class);
c.setAccessible(true);
converter = (Converter) c.newInstance(yqr);
}
catch(Exception e1)
{
l.warn("The specified class ["+converterClass+"] could not be instantiated. Trying default classes.",e1);
converter = getDefaultConverter(yqr);
}
}
}
else
{
converter = getDefaultConverter(yqr);
}
return converter;
}
/**
* Derives the default converter using the format and protocol values.
* @param yqr the result container
* @return the default Converter
* @throws YADARequestException when the default converter cannot be instantiated
* @throws YADAConverterException when result reformatting fails
* @throws YADAQueryConfigurationException
*/
protected Converter getDefaultConverter(YADAQueryResult yqr) throws YADARequestException, YADAConverterException, YADAQueryConfigurationException
{
Converter converter = null;
String format = yqr.getYADAQueryParamValue(YADARequest.PS_FORMAT);
String type = "";
String className = "";
try
{
if(yqr.isFormatStructured())
{
format = format.toUpperCase();
}
else
{
format = DELIMITED;
}
if(getProtocol().equals(Parser.JDBC))
{
type = RESULTSET_RESULT;
}
else if(getProtocol().equals(Parser.SOAP))
{
type = SOAP_RESULT;
}
else if(getProtocol().equals(Parser.REST))
{
type = REST_RESULT;
}
else if(getProtocol().equals(Parser.FILE))
{
type = FILESYSTEM_RESULT;
}
else
{
String msg = "The converter you are attempting to instantiate requires a protocol or class that is not supported. This could be a configuration issue.";
throw new YADAQueryConfigurationException(msg);
}
className = FORMAT_PKG+type+format+CONVERTER;
Constructor c = Class.forName(className).getConstructor(new Class[] { YADAQueryResult.class });
c.setAccessible(true);
converter = (AbstractConverter) c.newInstance(new Object[] {yqr});
}
catch (InstantiationException e)
{
String msg = "Could not instantiate Converter.";
throw new YADARequestException(msg,e);
}
catch (IllegalAccessException e)
{
String msg = "Could not access Converter class.";
throw new YADARequestException(msg,e);
}
catch (ClassNotFoundException e)
{
String msg = "Could not find Converter class";
throw new YADARequestException(msg,e);
}
catch (NoSuchMethodException e)
{
String msg = "There appears to be no Converter constructor accepting a YADAQueryResult parameter.";
throw new YADARequestException(msg,e);
}
catch (SecurityException e)
{
String msg = "There appears to be no public Converter constructor accepting a YADAQueryResult parameter.";
throw new YADARequestException(msg,e);
}
catch (IllegalArgumentException e)
{
String msg = "There appears to be no public Converter constructor accepting a YADAQueryResult parameter.";
throw new YADARequestException(msg,e);
}
catch (InvocationTargetException e)
{
String msg = "There appears to be no public Converter constructor accepting a YADAQueryResult parameter.";
throw new YADARequestException(msg,e);
}
return converter;
}
/**
* The {@link #yadaQueryResults} array serves as a proxy for the queries being handled in the response.
* Since each {@link YADAQuery} object maps to a single {@link YADAQueryResult} this works out fine.
* Thus the method returns {@code true} if the {@link #yadaQueryResults} array has a {@code length} = 1.
* @return {@code true} if the {@link #yadaQueryResults} array has a {@code length} = 1
*/
protected boolean hasSingularQuery() {
if(getYadaQueryResults().length == 1)
return true;
return false;
}
/**
* This method interrogates the {@link #yadaQueryResults} array. If {@link #hasSingularQuery()} returns {@code true}
* then the value at index 1 is checked. If this value is {@code null} or {@link YADAQueryResult#hasSingularResult()}
* returns {@code true} then this method returns {@code true} as well.
*
* @return {@code true} if the {@link #yadaQueryResults} array contains a null value at it's first index or the result
* object contains only a single result set
*/
protected boolean hasSingularResult() {
YADAQueryResult[] yqrs = getYadaQueryResults();
if(hasSingularQuery())
{
if(yqrs[0] == null
||(yqrs[0] != null && yqrs[0].hasSingularResult()))
{
return true;
}
}
return false;
}
/**
* Returns {@code true} if {@link #hasSingularResult()} returns {@code false} and {@link #getHarmonyMap()} returns {@code null}
* @return {@code true} if {@link #hasSingularResult()} returns {@code false} and {@link #getHarmonyMap()} returns {@code null}
*/
protected boolean hasMultipleResults() {
return !hasSingularResult() && getHarmonyMap() == null;
}
/**
* Extracts a {@link JSONObject} built from the value of {@link YADARequest#PS_HARMONYMAP} in the {@link #yqr}
* @return a {@link JSONObject} built from the value of {@link YADARequest#PS_HARMONYMAP} in the {@link #yqr}
*/
protected JSONObject getHarmonyMap()
{
JSONObject h = null;
try
{
h = new JSONObject(getYADAQueryResult().getYADAQueryParamValue(YADARequest.PS_HARMONYMAP));
}
catch(Exception e)
{
return null;
}
return h;
}
/**
* Standard mutator for variable
* @param yqr the result container to process
*/
protected void setYADAQueryResult(YADAQueryResult yqr)
{
this.yqr = yqr;
}
/**
* Accessor for object, returning the {@link YADAQueryResult} referenced by {@link #yqr} or first index of {@link #yadaQueryResults} if {@link #yqr} is null.
* @return the {@link YADAQueryResult} referenced by {@link #yqr} or first index of {@link #yadaQueryResults} if {@link #yqr} is null.
*/
protected YADAQueryResult getYADAQueryResult()
{
return this.yqr == null ? getYadaQueryResults()[0] : this.yqr;
}
/**
* Standard mutator for variable
* @param yadaQueryResults array of result containers (from the request)
*/
protected void setYADAQueryResults(YADAQueryResult[] yadaQueryResults)
{
this.yadaQueryResults = yadaQueryResults;
}
/**
* Standard accessor for variable
* @return the array of {@link YADAQueryResult}s
*/
protected YADAQueryResult[] getYadaQueryResults()
{
return this.yadaQueryResults;
}
/**
* Returns the current protocol value set in {@link #yqr}
* @return protocol value
* @see YADARequest#getProtocol()
* @see YADAQueryResult#getYADAQueryParamValue(String)
*/
protected String getProtocol()
{
return this.yqr.getYADAQueryParamValue(YADARequest.PS_PROTOCOL);
}
}
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