com.radialpoint.uima.typemapper.RulesFileLoader.java Source code

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Here is the source code for com.radialpoint.uima.typemapper.RulesFileLoader.java

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//   Type Mapper for UIMA
//   Copyright (C) 2014 Radialpoint Inc. radialpoint.com
//   
//   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.

package com.radialpoint.uima.typemapper;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Unmarshaller;

import org.apache.commons.collections.CollectionUtils;

/***
 * <rules> <rule> <inputType/> <outputType/> </rule> </rules>
 ***/

public class RulesFileLoader {

    private RulesFileLoader() {
    }

    public static Rules loadRulesFromFile(String fileResourceName) throws JAXBException, FileNotFoundException {
        return loadRulesFromStream(new FileInputStream(fileResourceName));
    }

    public static Rules loadRulesFromStream(InputStream stream) throws JAXBException, FileNotFoundException {

        Rules rules = new Rules();

        // Unmarshal
        JAXBContext jc = JAXBContext.newInstance(Rules.class, Rule.class);
        Unmarshaller unmarshaller = jc.createUnmarshaller();
        rules = (Rules) unmarshaller.unmarshal(stream);

        if (rules == null || CollectionUtils.isEmpty(rules.getRuleList())) {
            throw new JAXBException("Rules list is empty. Binding error?");
        }

        return rules;
    }
}