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benerator is a framework for creating realistic and valid high-volume test data, used for testing (unit/integration/load) and showcase setup. Metadata constraints are imported from systems and/or configuration files. Data can imported from and exported to files and systems, anonymized or generated from scratch. Domain packages provide reusable generators for creating domain-specific data as names and addresses internationalizable in language and region. It is strongly customizable with plugins and configuration options.
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/*
 * (c) Copyright 2008-2010 by Volker Bergmann. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted under the terms of the
 * GNU General Public License.
 *
 * For redistributing this software or a derivative work under a license other
 * than the GPL-compatible Free Software License as defined by the Free
 * Software Foundation or approved by OSI, you must first obtain a commercial
 * license to this software product from Volker Bergmann.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * WITHOUT A WARRANTY OF ANY KIND. ALL EXPRESS OR IMPLIED CONDITIONS,
 * REPRESENTATIONS AND WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE
 * HEREBY EXCLUDED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

package org.databene.model.data;

import org.databene.benerator.engine.expression.ScriptExpression;
import org.databene.commons.Expression;
import org.databene.commons.expression.ConstantExpression;
import org.databene.commons.expression.TypeConvertingExpression;
import org.databene.commons.operation.AndOperation;
import org.databene.commons.operation.OrOperation;

/**
 * Describes generation of (several) entities of a type by uniqueness, 
 * nullability and count characteristics.


 * Created: 03.03.2008 07:55:45
 * @since 0.5.0
 * @author Volker Bergmann
 */
public class InstanceDescriptor extends FeatureDescriptor {
    
    public static final String TYPE               = "type";
    
    // constraints
    public static final String UNIQUE             = "unique";
    public static final String NULLABLE           = "nullable";
    public static final String MIN_COUNT          = "minCount";
    public static final String MAX_COUNT          = "maxCount";
    
    // configs
    public static final String COUNT_PRECISION    = "countPrecision";
    public static final String COUNT_DISTRIBUTION = "countDistribution";
    public static final String COUNT              = "count";
    public static final String NULL_QUOTA         = "nullQuota";
    
    private InstanceDescriptor parent;
    private TypeDescriptor localType;
    
    // constructors ----------------------------------------------------------------------------------------------------

    public InstanceDescriptor(String name) {
        this(name, null, null);
    }

    public InstanceDescriptor(String name, String typeName) {
        this(name, typeName, null);
    }

    public InstanceDescriptor(String name, TypeDescriptor localType) {
        this(name, null, localType);
    }

    protected InstanceDescriptor(String name, String typeName, TypeDescriptor localType) {
        super(name);
        this.localType = localType;

        addConstraint(TYPE,        String.class, null, null);
        setType(typeName);

        // constraints
        addConstraint(UNIQUE,        Boolean.class, false, new OrOperation());
        addConstraint(NULLABLE,      Boolean.class, false, new AndOperation());
        addConstraint(MIN_COUNT,     Expression.class, null, null);
        addConstraint(MAX_COUNT,     Expression.class, null, null);
        
        // configs
        addConfig(COUNT,              Expression.class, null);
        addConfig(COUNT_PRECISION,    Expression.class, new ConstantExpression(1L));
        addConfig(COUNT_DISTRIBUTION, String.class, null);
        addConfig(NULL_QUOTA,         Double.class,     0.);
    }

    // properties ------------------------------------------------------------------------------------------------------

    public void setParent(InstanceDescriptor parent) {
    	this.parent = parent;
    }
    
    @Override
    public String getName() {
        String result = super.getName();
		return (result != null ? result : getType());
    }
    
    public String getType() {
    	String type = (String) getDetailValue(TYPE);
        return (type == null && parent != null ? parent.getType() : type);
    }
    
    public void setType(String type) {
        setDetailValue(TYPE, type);
    }
    
    public TypeDescriptor getTypeDescriptor() {
        if (getLocalType() != null)
            return getLocalType();
        TypeDescriptor type = null;
        if (getType() != null)
            type = DataModel.getDefaultInstance().getTypeDescriptor(getType());
        return type;
    }
    
    public TypeDescriptor getLocalType() {
    	if (localType == null && parent != null && parent.getLocalType() != null)
    		localType = getLocalType(parent.getLocalType() instanceof ComplexTypeDescriptor);
    	return localType;
    }
    
    public TypeDescriptor getLocalType(boolean complexType) {
        if (localType != null)
            return localType;
        if (complexType)
            localType = new ComplexTypeDescriptor(getName(), getType());
        else
            localType = new SimpleTypeDescriptor(getName(), getType());
        setType(null);
        return localType;
    }
    
    public void setLocalType(TypeDescriptor localType) {
        this.localType = localType;
        if (localType != null)
        	setType(null);
    }
    
    public Boolean isUnique() {
        return (Boolean) getDetailValue(UNIQUE);
    }

    public void setUnique(Boolean unique) {
        setDetailValue(UNIQUE, unique);
    }

    public Uniqueness getUniqueness() {
    	return (isUnique() ? Uniqueness.SIMPLE : Uniqueness.NONE);
    }
    
    public Boolean isNullable() {
        return (Boolean)getDetailValue(NULLABLE);
    }
    
    public void setNullable(Boolean nullable) {
        setDetailValue(NULLABLE, nullable);
    }
    
    @SuppressWarnings("unchecked")
    public Expression getMinCount() {
        return (Expression) getDetailValue(MIN_COUNT);
    }
    
    public void setMinCount(Expression minCount) {
        setDetailValue(MIN_COUNT, minCount);
    }

    @SuppressWarnings("unchecked")
    public Expression getMaxCount() {
        return (Expression) getDetailValue(MAX_COUNT);
    }
    
    public void setMaxCount(Expression maxCount) {
        setDetailValue(MAX_COUNT, maxCount);
    }

    @SuppressWarnings("unchecked")
    public Expression getCount() {
        return (Expression) getDetailValue(COUNT);
    }
    
    public void setCount(Expression count) {
        setDetailValue(COUNT, count);
    }

    public String getCountDistribution() {
        return (String) getDetailValue(COUNT_DISTRIBUTION);
    }
    
    public void setCountDistribution(String distribution) {
        setDetailValue(COUNT_DISTRIBUTION, distribution);
    }

    @SuppressWarnings("unchecked")
    public Expression getCountPrecision() {
        return (Expression) getDetailValue(COUNT_PRECISION);
    }
    
    public void setCountPrecision(Expression distribution) {
        setDetailValue(COUNT_PRECISION, distribution);
    }

    public Double getNullQuota() {
        return (Double)getDetailValue(NULL_QUOTA);
    }
    
    public void setNullQuota(Double nullQuota) {
        setDetailValue(NULL_QUOTA, nullQuota);
    }

    @Override
    public Object getDetailValue(String name) {
        Object value = super.getDetailValue(name);
        if (value == null && parent != null && parent.supportsDetail(name)) {
            FeatureDetail detail = parent.getConfiguredDetail(name);
            if (detail.isConstraint())
                value = detail.getValue();
        }
        if (value == null)
            value = getDetailDefault(name);
        return value;
    }
    
    @Override
    public void setDetailValue(String detailName, Object detailValue) {
    	if (COUNT.equals(detailName) || MIN_COUNT.equals(detailName) || MAX_COUNT.equals(detailName) || COUNT_PRECISION.equals(detailName)) {
            FeatureDetail