ca.uhn.fhir.rest.method.BaseJavaPrimitiveBinder.java Source code

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Here is the source code for ca.uhn.fhir.rest.method.BaseJavaPrimitiveBinder.java

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package ca.uhn.fhir.rest.method;

/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2016 University Health Network
 * %%
 * 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.
 * #L%
 */

import static org.apache.commons.lang3.StringUtils.isBlank;

import java.util.Collections;
import java.util.List;

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.model.api.IQueryParameterOr;
import ca.uhn.fhir.rest.param.StringParam;
import ca.uhn.fhir.rest.server.exceptions.InternalErrorException;
import ca.uhn.fhir.rest.server.exceptions.InvalidRequestException;

abstract class BaseJavaPrimitiveBinder<T> implements IParamBinder<T> {

    public BaseJavaPrimitiveBinder() {
        super();
    }

    protected abstract String doEncode(T theString);

    protected abstract T doParse(String theString);

    @SuppressWarnings("unchecked")
    @Override
    public List<IQueryParameterOr<?>> encode(FhirContext theContext, T theString) throws InternalErrorException {
        String retVal = doEncode(theString);
        if (isBlank(retVal)) {
            return Collections.emptyList();
        }
        List<?> retValList = Collections.singletonList(MethodUtil.singleton(new StringParam(retVal), null));
        return (List<IQueryParameterOr<?>>) retValList;
    }

    @Override
    public T parse(FhirContext theContext, String theName, List<QualifiedParamList> theParams)
            throws InternalErrorException, InvalidRequestException {
        if (theParams.size() == 0 || theParams.get(0).size() == 0) {
            return null;
        }
        if (theParams.size() > 1 || theParams.get(0).size() > 1) {
            throw new InvalidRequestException("Multiple values detected for non-repeatable parameter '" + theName
                    + "'. This server is not configured to allow multiple (AND) values for this param.");
        }

        T value = doParse(theParams.get(0).get(0));
        return value;
    }

}