package org.simantics.browsing.ui.swt; import java.io.File; import java.nio.file.Files; import java.nio.file.Path; import java.util.Arrays; import java.util.Collections; import java.util.List; import org.simantics.browsing.ui.ExplorerState; import org.simantics.browsing.ui.NodeContext; import org.simantics.browsing.ui.StatePersistor; import org.simantics.databoard.util.StringUtil; import org.simantics.db.common.utils.Logger; /** * @author Tuukka Lehtonen */ public class IdentifiedStatePersistor implements StatePersistor { protected final String id; public IdentifiedStatePersistor(String id) { this.id = id; } @Override public ExplorerState deserialize(File stateLocation, NodeContext root) { return stateLocation == null ? ExplorerState.EMPTY : deserialize(getMementoPath(stateLocation, root)); } @Override public void serialize(File stateLocation, NodeContext root, ExplorerState state) { if (stateLocation == null || root == null) return; try { GraphExplorerStateBean bean = toStateBean(state, root); Path memento = getMementoPath(stateLocation, root); if (bean != null && memento != null) Files.write(memento, bean.serialize()); } catch (Throwable t) { Logger.defaultLogError(t); } } protected ExplorerState deserialize(Path path) { if (path == null || !Files.exists(path)) return ExplorerState.EMPTY; try { GraphExplorerStateBean stateBean = new GraphExplorerStateBean(); stateBean.deserialize( Files.readAllBytes(path) ); return toState(stateBean); } catch (Throwable t) { Logger.defaultLogError(t); return ExplorerState.EMPTY; } } protected NodeContext[] toNodeContexts(GraphExplorerStateNodeBean[] beans) throws Exception { return NodeContext.NONE; } protected List toNodeContextList(GraphExplorerStateNodeBean[] beans) throws Exception { return beans.length == 0 ? Collections.emptyList() : Arrays.asList(toNodeContexts(beans)); } protected GraphExplorerStateNodeBean[] toNodeBeans(NodeContext[] contexts) { return GraphExplorerStateNodeBean.NONE; } protected ExplorerState toState(GraphExplorerStateBean stateBean) throws Exception { return new ExplorerState( toNodeContexts(stateBean.topNodePath), stateBean.topNodePathChildIndexes, toNodeContextList(stateBean.expandedNodes), stateBean.columnWidths); } /** * @param state * the {@link ExplorerState} to transform into a * {@link GraphExplorerStateBean} * @param root * the input root node context that was used to initialize the * explorer state * @return */ protected GraphExplorerStateBean toStateBean(ExplorerState state, NodeContext root) { GraphExplorerStateBean ib = new GraphExplorerStateBean(); ib.topNodePath = toNodeBeans(state.topNodePath); ib.topNodePathChildIndexes = state.topNodePathChildIndex; ib.expandedNodes = toNodeBeans(state.expandedNodes.toArray(NodeContext.NONE)); ib.columnWidths = state.columnWidths; return ib; } protected Path getMementoPath(File stateLocation, NodeContext root) { return stateLocation.toPath().resolve(StringUtil.escapeToFileName(id) + ".ge"); } }