Java数据集字段支持分类

/**
 * 返回分类资源
 * 
 * @param parentId
 *            父资源ID，当父ID为null则返回顶级分类资源
 * @return elements list
 */
public List<JavaQueryCatalogElement> getCatalogElements(String parentId);
/**
 * 返回分类下的输出字段
 * 
 * @param catalogId
 *            分类ID
 * @return fields list
 */
public List<JavaQueryOutputField> getOutputFields(String catalogId);
/**
 * 返回已选择的字段
 * 
 * @return
 */
public List<? extends IField> getSelectedFields();
/**
 * 设置已选择的字段
 * 
 * @param feilds
 */
public void setSelectedFields(List<? extends IField> feilds);

package smartbi.freequery.metadata;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import smartbi.catalogtree.CatalogElement;
import smartbi.catalogtree.CatalogTreeModule;
import smartbi.freequery.metadata.IJavaQueryData.ICatalogFieldSupport;
import smartbi.freequery.querydata.CellData;
import smartbi.freequery.querydata.GridData;
import smartbi.freequery.repository.BasicField;
import smartbi.freequery.repository.FreeQueryDAOFactory;
import smartbi.freequery.repository.IField;
import smartbi.util.CatalogElementType;
import smartbi.util.StringUtil;
public class TestJavaQueryData implements IJavaQueryData, ICatalogFieldSupport {
	private List<? extends IField> selectedFields = null;
	private static final String ID_PREFIX = "JQID_";
	@Override
	public List<JavaQueryCatalogElement> getCatalogElements(String parentId) {
		List<JavaQueryCatalogElement> result = new ArrayList<JavaQueryCatalogElement>();
		if (StringUtil.isNullOrEmpty(parentId)) {
			parentId = "DS.SYSTEM知识库";
		}
		parentId = parentId.replaceFirst(ID_PREFIX, "");
		List<CatalogElement> elems = CatalogTreeModule.getInstance()
				.getChildElements(parentId);
		if (elems != null) {
			for (CatalogElement elem : elems) {
				String type = elem.getType();
				if (!CatalogElementType.SCHEMA.name().equals(type)
						&& !CatalogElementType.BASETABLE.name().equals(type)) {
					continue;
				}
				result.add(new JavaQueryCatalogElement(
						ID_PREFIX + elem.getId(), elem.getName(), elem
								.getAlias(), elem.getDesc()));
			}
		}
		return result;
	}
	@Override
	public List<JavaQueryOutputField> getOutputFields(String catalogId) {
		List<JavaQueryOutputField> result = new ArrayList<JavaQueryOutputField>();
		if (StringUtil.isNullOrEmpty(catalogId)) {
			return result;
		}
		catalogId = catalogId.replaceFirst(ID_PREFIX, "");
		CatalogElement parentElem = CatalogTreeModule.getInstance()
				.getCatalogElementById(catalogId);
		String parentName = parentElem == null ? "" : parentElem.getName();
		List<CatalogElement> elems = CatalogTreeModule.getInstance()
				.getChildElements(catalogId);
		if (elems != null) {
			for (CatalogElement elem : elems) {
				String type = elem.getType();
				if (!CatalogElementType.FIELD.name().equals(type)) {
					continue;
				}
				BasicField f = FreeQueryDAOFactory.getBasicFieldDAO().load(
						elem.getId());
				if (f == null) {
					continue;
				}
				result.add(new JavaQueryOutputField(ID_PREFIX + f.getId(),
						parentName + "_" + f.getName(), f.getAlias(), f
								.getDesc(), f.getDataType(), f.getDataFormat()));
			}
		}
		return result;
	}
	@Override
	public void loadConfigs(String configs) {
		//
	}
	@Override
	public String saveConfigs() {
		return null;
	}
	@Override
	public List<JavaQueryConfig> getConfigs() {
		return new ArrayList<JavaQueryConfig>();
	}
	@Override
	public void setConfigValue(String key, String value) {
		//
	}
	@Override
	public void setConfigValues(Map<String, String> configValues) {
		//
	}
	@Override
	public void init() {
		//
	}
	@Override
	public List<JavaQueryParameter> getParameters() {
		return new ArrayList<JavaQueryParameter>();
	}
	@Override
	public List<JavaQueryOutputField> getOutputFields() {
		List<JavaQueryOutputField> result = new ArrayList<JavaQueryOutputField>();
		// getOutputFields(null, result);
		return result;
	}
	protected void getOutputFields(String parentId,
			List<JavaQueryOutputField> result) {
		result.addAll(getOutputFields(parentId));
		List<JavaQueryCatalogElement> elems = getCatalogElements(parentId);
		for (JavaQueryCatalogElement elem : elems) {
			getOutputFields(elem.getId(), result);
		}
	}
	@Override
	public void setParameterValue(String id, String value, String displayValue) {
		//
	}
	@Override
	public int getRowCount() {
		return Integer.MAX_VALUE;
	}
	@Override
	public GridData getGridData(int from, int count) {
		GridData gridData = new GridData();
		List<? extends IField> outfields = getSelectedFields();
		List<String> stringHeaders = new ArrayList<String>();
		for (int i = 0; i < outfields.size(); i++) {
			stringHeaders.add(outfields.get(i).getName());
		}
		gridData.setStringHeaders(stringHeaders);
		List<List<CellData>> cells = new ArrayList<List<CellData>>();
		int totalRows = 25;
		int to = Math.min(from + count, totalRows);
		for (int i = from; i < to; i++) {
			List<CellData> row = new ArrayList<CellData>();
			for (int j = 0; j < outfields.size(); j++) {
				CellData cell = new CellData();
				cell.setIntValue(j + 1);
				cell.setStringValue("" + (j + 1));
				row.add(cell);
			}
			cells.add(row);
		}
		gridData.setData(cells);
		gridData.setTotalRowsCount(totalRows);
		return gridData;
	}
	@Override
	public void close() {
		//
	}
	@Override
	public List<? extends IField> getSelectedFields() {
		return selectedFields == null ? new ArrayList<IField>()
				: selectedFields;
	}
	@Override
	public void setSelectedFields(List<? extends IField> feilds) {
		selectedFields = feilds;
	}
}