de.stefanteitge.kwery.internal.Entity.java Source code

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Here is the source code for de.stefanteitge.kwery.internal.Entity.java

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/*
 * This file is part of Kwery.
 *
 * Kwery is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Kwery is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Kwery.  If not, see <http://www.gnu.org/licenses/>.
 */
package de.stefanteitge.kwery.internal;

import java.lang.reflect.InvocationTargetException;
import java.util.Arrays;
import java.util.Map;

import org.apache.commons.beanutils.PropertyUtils;

import com.google.common.base.Objects;

import de.stefanteitge.kwery.IEntity;
import de.stefanteitge.kwery.ITable;
import de.stefanteitge.kwery.KweryException;

public class Entity implements IEntity {

    private final Table table;

    private final Map<String, String> fields;

    private boolean modified;

    public Entity(Table table, Map<String, String> fields) {
        this.table = table;
        this.fields = fields;
    }

    @Override
    public <T> T beanify(Class<T> clazz) throws KweryException {
        try {
            T bean = clazz.newInstance();

            for (String column : getTable().getColumns()) {
                PropertyUtils.setSimpleProperty(bean, column, getValue(column));
            }

            return bean;
        } catch (InstantiationException e) {
            throw new KweryException("Beanify failed", e);
        } catch (IllegalAccessException e) {
            throw new KweryException("Beanify failed", e);
        } catch (NoSuchMethodException e) {
            throw new KweryException("Beanify failed", e);
        } catch (InvocationTargetException e) {
            throw new KweryException("Beanify failed", e);
        }
    }

    @Override
    public ITable getTable() {
        return table;
    }

    @Override
    public String getValue(String column) {
        if (!isColumnInTable(column)) {
            if (getTable().getDatabase().getConfig().getRequireColumnDeclaration()) {
                // TODO maybe use custom runtime exception here
                throw new RuntimeException("Column " + column + " does no exist in table");
            }

            return null;
        }

        return fields.get(column);
    }

    @Override
    public boolean isModified() {
        return modified;
    }

    @Override
    public void setModified(boolean modified) {
        this.modified = modified;
    }

    @Override
    public void setValue(String column, String value) {
        if (!isColumnInTable(column)) {
            if (getTable().getDatabase().getConfig().getRequireColumnDeclaration()) {
                // TODO maybe use custom runtime exception here
                throw new RuntimeException("Column " + column + " does no exist in table");
            }

            getTable().addColumn(column);
        }

        String oldValue = fields.put(column, value);

        if ((oldValue != null && !oldValue.equals(value)) || (oldValue == null && value != null)) {
            modified = true;
        }
    }

    @Override
    public String toString() {
        return Objects.toStringHelper(getClass()).add("Table", table).toString();
    }

    protected boolean isColumnInTable(String column) {
        return Arrays.asList(table.getColumns()).contains(column);
    }
}