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 * 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
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package org.apache.ofbiz.minilang.method.conditional;

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

import org.apache.ofbiz.base.util.UtilXml;
import org.apache.ofbiz.minilang.MiniLangElement;
import org.apache.ofbiz.minilang.MiniLangException;
import org.apache.ofbiz.minilang.MiniLangValidate;
import org.apache.ofbiz.minilang.SimpleMethod;
import org.apache.ofbiz.minilang.artifact.ArtifactInfoContext;
import org.apache.ofbiz.minilang.method.MethodContext;
import org.apache.ofbiz.minilang.method.MethodOperation;
import org.w3c.dom.Element;

/**
 * Implements the &lt;else-if&gt; element.
 * 
 * @see <a href="https://cwiki.apache.org/confluence/display/OFBIZ/Mini+Language+-+minilang+-+simple-method+-+Reference">Mini-language Reference</a>
 */
public final class ElseIf extends MiniLangElement {

    private final Conditional condition;
    private final List<MethodOperation> thenSubOps;

    public ElseIf(Element element, SimpleMethod simpleMethod) throws MiniLangException {
        super(element, simpleMethod);
        if (MiniLangValidate.validationOn()) {
            MiniLangValidate.childElements(simpleMethod, element, "condition", "then");
            MiniLangValidate.requiredChildElements(simpleMethod, element, "condition", "then");
        }
        Element conditionElement = UtilXml.firstChildElement(element, "condition");
        Element conditionChildElement = UtilXml.firstChildElement(conditionElement);
        this.condition = ConditionalFactory.makeConditional(conditionChildElement, simpleMethod);
        Element thenElement = UtilXml.firstChildElement(element, "then");
        this.thenSubOps = Collections.unmodifiableList(SimpleMethod.readOperations(thenElement, simpleMethod));
    }

    public boolean checkCondition(MethodContext methodContext) throws MiniLangException {
        return condition.checkCondition(methodContext);
    }

    @Override
    public void gatherArtifactInfo(ArtifactInfoContext aic) {
        for (MethodOperation method : this.thenSubOps) {
            method.gatherArtifactInfo(aic);
        }
    }

    public List<MethodOperation> getThenSubOps() {
        return this.thenSubOps;
    }

    public boolean runSubOps(MethodContext methodContext) throws MiniLangException {
        return SimpleMethod.runSubOps(thenSubOps, methodContext);
    }
}
