ObjectConverter.java

package jpaoletti.jpm.struts.converter;

import jpaoletti.jpm.converter.ConverterException;
import jpaoletti.jpm.core.*;
import jpaoletti.jpm.core.message.MessageFactory;
import jpaoletti.jpm.struts.CollectionHelper;
import jpaoletti.jpm.struts.tags.PMTags;

/**
 * Converter for integer <br>
 * <pre>
 * {@code
 * <converter class="jpaoletti.jpm.converter.ObjectConverter">
 *     <operationId>edit</operationId>
 *         <properties>
 *             <property name="entity"          value="other_entity" />
 *             <property name="display"         value="other_entity_display" />
 *             <property name="with-null"       value="true" />
 *             <property name="filter"          value="jpaoletti.jpm.core.ListFilterXX" />
 *             <property name="sort-field"      value="xxx" />
 *             <property name="sort-direction"  value="asc | desc" />
 *             <property name="min-search-size" value="0" />
 *         </properties>
 * </converter>
 * }
 * </pre>
 *
 * @author jpaoletti
 *
 */
public class ObjectConverter extends StrutsEditConverter {

    @Override
    public Object build(PMContext ctx) throws ConverterException {
        try {
            final String _entity = getConfig("entity");
            final Entity entity = ctx.getPresentationManager().getEntity(_entity);
            final String newFieldValue = (String) ctx.getFieldValue();
            if (newFieldValue == null || newFieldValue.trim().equals("-1") || "".equals(newFieldValue)) {
                return null;
            }
            return entity.getDataAccess().getItem(ctx, new InstanceId(newFieldValue));
        } catch (PMException ex) {
            throw new ConverterException(MessageFactory.error(ctx.getEntity(), ctx.getField(), "cant.convert.object", ex.getMessage()));
        }
    }

    @Override
    public Object visualize(PMContext ctx) throws ConverterException {
        final String _entity = getConfig("entity");
        final StringBuilder url = new StringBuilder("object_converter.jsp");
        url.append("?related=").append(getConfig("related", ""));
        url.append("&oentity=").append(_entity);

        final Entity entity = ctx.getPresentationManager().getEntity(_entity);
        if (entity == null) {
            throw new ConverterException("object.converter.entity.cannot.be.null");
        }
        if (!entity.isIdentified()) {
            throw new ConverterException("object.converter.id.cannot.be.null");
        }
        final Object fieldValue = ctx.getFieldValue();
        final String _display = getConfig("display");
        if (fieldValue == null) {
            ctx.put("_selected_value", "");
            ctx.put("_selected_id", "-1");
            ctx.put("_with_null", getConfig("with-null", "false")); //false because selected is already null
        } else {
            final CollectionHelper helper = new CollectionHelper(_display);
            try {
                ctx.put("_selected_value", helper.getObjectDisplay(fieldValue));
                ctx.put("_selected_id", entity.getDataAccess().getInstanceId(ctx, new EntityInstanceWrapper(fieldValue)).getValue());
                ctx.put("_with_null", getConfig("with-null", "false"));
            } catch (PMException ex) {
                throw new ConverterException("object.converter.cannot.get.id");
            }
        }
        ctx.put("_min_search_size", getConfig("min-search-size", "0"));
        ctx.put("_search", getConfig("search", "false"));
        final StringBuilder sb = new StringBuilder("/get_list.do");
        sb.append("?entity=").append(_entity);
        sb.append("&filter_class=").append(getConfig("filter"));
        sb.append("&id=").append("");
        if (_display != null) {
            sb.append("&display=").append(_display);
        }
        sb.append("&sortField=").append(getConfig("sort-field"));
        sb.append("&originalEntity=").append(ctx.getEntity().getId());
        sb.append("&originalOperation=").append(ctx.getOperation().getId());
        sb.append("&relatedFieldName=").append(getConfig("related", ""));
        sb.append("&relatedRequired=").append(getConfig("related-required", "false"));
        final String sd = getConfig("sort-direction");
        if (sd != null && !"".equals(sd.trim()) && "desc".equalsIgnoreCase(sd)) {
            sb.append("&sortDir=").append("1");
        }
        ctx.put("jsonUrl", PMTags.plainUrl(ctx.getPmsession(), sb.toString()));

        //works only for bootstrap version
        if ("true".equals(getConfig("add", "false"))) {
            if (entity.getOperations().getOperation("add") != null) {
                url.append("&add=").append(PMTags.plainUrl(ctx.getPmsession(), "add.do?pmid=" + _entity));
            }
        }
        return super.visualize(url.toString());
    }
}