alba.solr.core.DynamicValueSourceParser.java Source code

Introduction

Here is the source code for alba.solr.core.DynamicValueSourceParser.java

Source

package alba.solr.core;

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.apache.commons.lang.math.NumberUtils;
import org.apache.lucene.queries.function.ValueSource;
import org.apache.lucene.queries.function.valuesource.ConstValueSource;
import org.apache.lucene.queries.function.valuesource.LiteralValueSource;
import org.apache.solr.schema.SchemaField;
import org.apache.solr.search.FunctionQParser;
import org.apache.solr.search.SyntaxError;
import org.apache.solr.search.ValueSourceParser;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import alba.solr.docvalues.FunctionExecutor;

public class DynamicValueSourceParser extends ValueSourceParser {

    Logger logger = LoggerFactory.getLogger(this.getClass().getName());

    Map<String, DocValuesDynamicValueSource> dynamicFunctions;

    String[] rawargs = new String[100];

    Map<String, String> args = new HashMap<String, String>();

    DocValuesDynamicValueSource valueSource = new DocValuesDynamicValueSource("id");

    private Map<String, CallableFunction> functions;

    @SuppressWarnings("unchecked")
    public ValueSource parse(FunctionQParser fp) throws SyntaxError {

        String functionName;

        List<ValueSource> valueSourceList = new ArrayList<ValueSource>();

        functions = (Map<String, CallableFunction>) fp.getReq().getContext().get(Loader.FUNCTIONS);

        Map<String, ValueSource> values = new HashMap<String, ValueSource>();

        int i = 0;
        while (fp.hasMoreArguments()) {
            rawargs[i++] = fp.parseArg();
        }

        functionName = rawargs[0];

        CallableFunction function = functions.get(functionName);

        //still need this?

        // FunctionExecutionContext cachedEC = (FunctionExecutionContext)fp.getReq().getContext().get(fp.getString() );
        /* if (cachedEC != null) {
           logger.error("reusing executor from cache!");
           return cachedEC.getFunctionExecutor();
        } */

        for (int k = 1; k < i; k++) {
            String parts[] = rawargs[k].split("=");
            String name = parts[0];
            String value = parts[1];

            args.put(parts[0], parts[1]);

            if (value.startsWith("\"") && value.endsWith("\"")) {
                //probably quite ineffcient..
                String v = value.replaceAll("^\"", "").replaceAll("\"$", "");
                LiteralValueSource l = new LiteralValueSource(v);
                values.put(name, l);
                valueSourceList.add(l);
            } else if (NumberUtils.isNumber(value)) {
                ConstValueSource cvs = new ConstValueSource(Float.parseFloat(value));
                values.put(name, cvs);
                valueSourceList.add(cvs);
            } else {
                SchemaField f = fp.getReq().getSchema().getField(value);
                ValueSource vs = f.getType().getValueSource(f, fp);
                values.put(name, vs);
                valueSourceList.add(vs);
            }

        }

        FunctionExecutor executor = new FunctionExecutor(values, valueSourceList, fp, this);

        executor.setFunction(functions.get(functionName));

        // still need this????
        FunctionExecutionContext ec = new FunctionExecutionContext(fp.getString(), values, function, executor);
        fp.getReq().getContext().put(fp.getString(), ec);

        return executor;

    }

    public void addCustomFields() {
        // TODO Auto-generated method stub
        logger.error("I'll add custom fields!"); //how??
    }
}