Example usage for org.apache.solr.search SortSpecParsing parseSortSpec

Introduction

In this page you can find the example usage for org.apache.solr.search SortSpecParsing parseSortSpec.

Prototype

public static SortSpec parseSortSpec(String sortSpec, IndexSchema schema) 

Source Link

Document

The form of the (function free) sort specification string currently parsed is:

 SortSpec ::= SingleSort [, SingleSort] SingleSort ::= <fieldname> SortDirection SortDirection ::= top | desc | bottom | asc 

Examples:

 score desc               #normal sort by score (will return null) weight bottom            #sort by weight ascending weight desc              #sort by weight descending height desc,weight desc  #sort by height descending, and use weight descending to break any ties height desc,weight asc   #sort by height descending, using weight ascending as a tiebreaker 

Usage

From source file:org.alfresco.solr.query.AbstractQParser.java

License:Open Source License

@Override
public SortSpec getSortSpec(boolean useGlobalParams) throws SyntaxError {

    getQuery(); // ensure query is parsed first

    String sortStr = null;//from  www .j  ava2  s.  c  om
    String startS = null;
    String rowsS = null;

    if (localParams != null) {
        sortStr = localParams.get(CommonParams.SORT);
        startS = localParams.get(CommonParams.START);
        rowsS = localParams.get(CommonParams.ROWS);

        // if any of these parameters are present, don't go back to the global params
        if (sortStr != null || startS != null || rowsS != null) {
            useGlobalParams = false;
        }
    }

    if (useGlobalParams) {
        if (sortStr == null) {
            sortStr = params.get(CommonParams.SORT);
        }
        if (startS == null) {
            startS = params.get(CommonParams.START);
        }
        if (rowsS == null) {
            rowsS = params.get(CommonParams.ROWS);
        }
    }

    int start = startS != null ? Integer.parseInt(startS) : 0;
    int rows = rowsS != null ? Integer.parseInt(rowsS) : 10;

    // Fix sort fields here
    if (sortStr != null) {
        StringBuilder builder = new StringBuilder();
        StringBuilder propertyBuilder = null;
        char c;
        for (int i = 0; i < sortStr.length(); i++) {
            c = sortStr.charAt(i);
            if (propertyBuilder == null) {
                if (!Character.isWhitespace(c) && (c != ',')) {
                    propertyBuilder = new StringBuilder();
                    propertyBuilder.append(c);
                } else {
                    builder.append(c);
                }
            } else {
                if (Character.isWhitespace(c) || (c == ',')) {
                    String toAppend = AlfrescoSolrDataModel.getInstance()
                            .mapProperty(propertyBuilder.toString(), FieldUse.SORT, getReq());
                    builder.append(toAppend);
                    builder.append(c);
                    propertyBuilder = null;
                } else {
                    propertyBuilder.append(c);
                }
            }
        }
        if (propertyBuilder != null) {
            String toAppend = AlfrescoSolrDataModel.getInstance().mapProperty(propertyBuilder.toString(),
                    FieldUse.SORT, getReq());
            builder.append(toAppend);
        }
        sortStr = builder.toString();
    }

    if (sortStr != null) {
        sortStr = sortStr.replaceAll("^ID(\\s)", "id$1");
        sortStr = sortStr.replaceAll("(\\s)ID(\\s)", "$1id$2");
    }
    SortSpec sort = SortSpecParsing.parseSortSpec(sortStr, req);

    sort.setOffset(start);
    sort.setCount(rows);
    return sort;
}

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