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

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

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package ca.uhn.fhir.rest.method;

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

/*
 * #%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 java.util.ArrayList;
import java.util.StringTokenizer;

import ca.uhn.fhir.context.FhirContext;
import ca.uhn.fhir.model.api.IQueryParameterOr;
import ca.uhn.fhir.model.api.IQueryParameterType;

public class QualifiedParamList extends ArrayList<String> {

    private static final long serialVersionUID = 1L;

    private String myQualifier;

    public QualifiedParamList() {
        super();
    }

    public QualifiedParamList(int theCapacity) {
        super(theCapacity);
    }

    public QualifiedParamList(IQueryParameterOr<?> theNextOr, FhirContext theContext) {
        for (IQueryParameterType next : theNextOr.getValuesAsQueryTokens()) {
            if (myQualifier == null) {
                myQualifier = next.getQueryParameterQualifier();
            }
            add(next.getValueAsQueryToken(theContext));
        }
    }

    public String getQualifier() {
        return myQualifier;
    }

    public void setQualifier(String theQualifier) {
        myQualifier = theQualifier;
    }

    public static QualifiedParamList singleton(String theParamValue) {
        return singleton(null, theParamValue);
    }

    public static QualifiedParamList singleton(String theQualifier, String theParamValue) {
        QualifiedParamList retVal = new QualifiedParamList(1);
        retVal.setQualifier(theQualifier);
        retVal.add(theParamValue);
        return retVal;
    }

    public static QualifiedParamList splitQueryStringByCommasIgnoreEscape(String theQualifier, String theParams) {
        QualifiedParamList retVal = new QualifiedParamList();
        retVal.setQualifier(theQualifier);

        StringTokenizer tok = new StringTokenizer(theParams, ",", true);
        String prev = null;
        while (tok.hasMoreElements()) {
            String str = tok.nextToken();
            if (isBlank(str)) {
                prev = null;
                continue;
            }

            if (str.equals(",")) {
                if (countTrailingSlashes(prev) % 2 == 1) {
                    int idx = retVal.size() - 1;
                    String existing = retVal.get(idx);
                    prev = existing.substring(0, existing.length() - 1) + ',';
                    retVal.set(idx, prev);
                } else {
                    prev = null;
                }
                continue;
            }

            if (prev != null && prev.length() > 0 && prev.charAt(prev.length() - 1) == ',') {
                int idx = retVal.size() - 1;
                String existing = retVal.get(idx);
                prev = existing + str;
                retVal.set(idx, prev);
            } else {
                retVal.add(str);
                prev = str;
            }

        }

        return retVal;
    }

    private static int countTrailingSlashes(String theString) {
        if (theString == null) {
            return 0;
        }
        int retVal = 0;
        for (int i = theString.length() - 1; i >= 0; i--) {
            char nextChar = theString.charAt(i);
            if (nextChar != '\\') {
                break;
            } else {
                retVal++;
            }
        }
        return retVal;
    }

}