com.evolveum.midpoint.model.common.expression.evaluator.GenerateExpressionEvaluatorFactory.java Source code

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Here is the source code for com.evolveum.midpoint.model.common.expression.evaluator.GenerateExpressionEvaluatorFactory.java

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/*
 * Copyright (c) 2010-2015 Evolveum
 *
 * 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.
 */
package com.evolveum.midpoint.model.common.expression.evaluator;

import java.util.Collection;

import javax.xml.bind.JAXBElement;
import javax.xml.namespace.QName;

import com.evolveum.midpoint.task.api.Task;
import org.apache.commons.lang.Validate;

import com.evolveum.midpoint.model.common.expression.ExpressionEvaluator;
import com.evolveum.midpoint.model.common.expression.ExpressionEvaluatorFactory;
import com.evolveum.midpoint.prism.ItemDefinition;
import com.evolveum.midpoint.prism.PrismContext;
import com.evolveum.midpoint.prism.PrismValue;
import com.evolveum.midpoint.prism.crypto.Protector;
import com.evolveum.midpoint.schema.result.OperationResult;
import com.evolveum.midpoint.schema.util.ObjectResolver;
import com.evolveum.midpoint.util.exception.ObjectNotFoundException;
import com.evolveum.midpoint.util.exception.SchemaException;
import com.evolveum.midpoint.xml.ns._public.common.common_3.GenerateExpressionEvaluatorType;
import com.evolveum.midpoint.xml.ns._public.common.common_3.ObjectFactory;
import com.evolveum.midpoint.xml.ns._public.common.common_3.StringPolicyType;
import com.evolveum.midpoint.xml.ns._public.common.common_3.ValuePolicyType;

/**
 * @author semancik
 *
 */
public class GenerateExpressionEvaluatorFactory implements ExpressionEvaluatorFactory {

    private Protector protector;
    private PrismContext prismContext;
    private ObjectResolver objectResolver;

    public GenerateExpressionEvaluatorFactory(Protector protector, ObjectResolver objectResolver,
            PrismContext prismContext) {
        super();
        this.protector = protector;
        this.prismContext = prismContext;
        this.objectResolver = objectResolver;
    }

    @Override
    public QName getElementName() {
        return new ObjectFactory().createGenerate(new GenerateExpressionEvaluatorType()).getName();
    }

    /* (non-Javadoc)
     * @see com.evolveum.midpoint.common.expression.ExpressionEvaluatorFactory#createEvaluator(javax.xml.bind.JAXBElement, com.evolveum.midpoint.prism.PrismContext)
     */
    @Override
    public <V extends PrismValue, D extends ItemDefinition> ExpressionEvaluator<V, D> createEvaluator(
            Collection<JAXBElement<?>> evaluatorElements, D outputDefinition, String contextDescription, Task task,
            OperationResult result) throws SchemaException, ObjectNotFoundException {

        Validate.notNull(outputDefinition,
                "output definition must be specified for 'generate' expression evaluator");

        if (evaluatorElements.size() > 1) {
            throw new SchemaException("More than one evaluator specified in " + contextDescription);
        }
        JAXBElement<?> evaluatorElement = evaluatorElements.iterator().next();

        Object evaluatorTypeObject = null;
        if (evaluatorElement != null) {
            evaluatorTypeObject = evaluatorElement.getValue();
        }
        if (evaluatorTypeObject != null && !(evaluatorTypeObject instanceof GenerateExpressionEvaluatorType)) {
            throw new SchemaException("Generate expression evaluator cannot handle elements of type "
                    + evaluatorTypeObject.getClass().getName() + " in " + contextDescription);
        }

        GenerateExpressionEvaluatorType generateEvaluatorType = (GenerateExpressionEvaluatorType) evaluatorTypeObject;

        StringPolicyType elementStringPolicy = null;
        if (generateEvaluatorType.getValuePolicyRef() != null) {
            ValuePolicyType valuePolicyType = objectResolver.resolve(generateEvaluatorType.getValuePolicyRef(),
                    ValuePolicyType.class, null, "resolving value policy reference in " + contextDescription, task,
                    result);
            elementStringPolicy = valuePolicyType.getStringPolicy();
        }

        return new GenerateExpressionEvaluator<V, D>(generateEvaluatorType, outputDefinition, protector,
                elementStringPolicy, prismContext);
    }

}