ExpressionTypeDto.java example

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/*
 * Copyright (c) 2010-2014 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.web.component.input.dto;

import com.evolveum.midpoint.prism.PrismContext;
import com.evolveum.midpoint.util.exception.SchemaException;
import com.evolveum.midpoint.util.logging.LoggingUtils;
import com.evolveum.midpoint.util.logging.Trace;
import com.evolveum.midpoint.util.logging.TraceManager;
import com.evolveum.midpoint.web.util.ExpressionUtil;
import com.evolveum.midpoint.xml.ns._public.common.common_3.ExpressionType;
import com.evolveum.midpoint.xml.ns._public.common.common_3.ObjectReferenceType;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;

import javax.xml.bind.JAXBElement;
import java.io.Serializable;

/**
 *  @author shood
 * */
public class ExpressionTypeDto implements Serializable{

    private static final Trace LOGGER = TraceManager.getTrace(ExpressionTypeDto.class);

    public static final String F_DESCRIPTION = "description";
    public static final String F_TYPE = "type";
    public static final String F_LANGUAGE = "language";
    public static final String F_POLICY_REF = "policyRef";
    public static final String F_EXPRESSION = "expression";

    private ExpressionUtil.ExpressionEvaluatorType type;
    private ExpressionUtil.Language language;
    private ObjectReferenceType policyRef;
    private String expression;
    @NotNull private final ExpressionType expressionObject;

    public ExpressionTypeDto(@Nullable ExpressionType expression, @NotNull PrismContext prismContext) {
        if (expression != null) {
            expressionObject = expression;
        } else {
            expressionObject = new ExpressionType();
        }
        if (!expressionObject.getExpressionEvaluator().isEmpty()) {
            loadExpression(prismContext);
        }
    }

    private void loadExpression(PrismContext context) {
        try {
            if (expressionObject.getExpressionEvaluator().size() == 1) {
                expression = context.xmlSerializer().serialize(expressionObject.getExpressionEvaluator().get(0));
            } else {
                StringBuilder sb = new StringBuilder();

                for (JAXBElement<?> element: expressionObject.getExpressionEvaluator()) {
                    String subElement = context.xmlSerializer().serialize(element);
                    sb.append(subElement).append("\n");
                }
                expression = sb.toString();
            }

            type = ExpressionUtil.getExpressionType(expression);
            if (type != null && type.equals(ExpressionUtil.ExpressionEvaluatorType.SCRIPT)) {
                language = ExpressionUtil.getExpressionLanguage(expression);
            }

            //TODO - add algorithm to determine objectReferenceType from String expression
        } catch (SchemaException e) {
            //TODO - how can we show this error to user?
            LoggingUtils.logUnexpectedException(LOGGER, "Could not load expressions from ExpressionType.", e);
            expression = e.getMessage();
        }
    }

    public void updateExpression(PrismContext context) throws SchemaException, IllegalArgumentException {
		ExpressionUtil.parseExpressionEvaluators(expression, expressionObject, context);
    }

    public void updateExpressionType(){
        expression = ExpressionUtil.getExpressionString(type);
    }

    public void updateExpressionLanguage(){
        expression = ExpressionUtil.getExpressionString(type, language);
    }

    public void updateExpressionValuePolicyRef(){
        expression = ExpressionUtil.getExpressionString(type, policyRef);
    }

    public ExpressionUtil.ExpressionEvaluatorType getType() {
        return type;
    }

    public void setType(ExpressionUtil.ExpressionEvaluatorType type) {
        this.type = type;
    }

    public ExpressionUtil.Language getLanguage() {
        return language;
    }

    public void setLanguage(ExpressionUtil.Language language) {
        this.language = language;
    }

    public ObjectReferenceType getPolicyRef() {
        return policyRef;
    }

    public void setPolicyRef(ObjectReferenceType policyRef) {
        this.policyRef = policyRef;
    }

    public String getExpression() {
        return expression;
    }

    public void setExpression(String expression) {
        this.expression = expression;
    }

    @NotNull
	public ExpressionType getExpressionObject() {
        return expressionObject;
    }

	public String getDescription() {
		return expressionObject.getDescription();
	}

	public void setDescription(String description) {
		expressionObject.setDescription(description);
	}

    @Override
    public boolean equals(Object o) {
        if (this == o) return true;
        if (!(o instanceof ExpressionTypeDto)) return false;

        ExpressionTypeDto that = (ExpressionTypeDto) o;

        if (expression != null ? !expression.equals(that.expression) : that.expression != null) return false;
        if (!expressionObject.equals(that.expressionObject))
            return false;
        if (language != that.language) return false;
        if (policyRef != null ? !policyRef.equals(that.policyRef) : that.policyRef != null) return false;
        if (type != that.type) return false;

        return true;
    }

    @Override
    public int hashCode() {
        int result = type != null ? type.hashCode() : 0;
        result = 31 * result + (language != null ? language.hashCode() : 0);
        result = 31 * result + (policyRef != null ? policyRef.hashCode() : 0);
        result = 31 * result + (expression != null ? expression.hashCode() : 0);
        result = 31 * result + expressionObject.hashCode();
        return result;
    }
}