svn-gvsig-desktop / branches / v2_0_0_prep / libraries / libTools / src / org / gvsig / tools / persistence / xml / XMLPersistentStateReader.java @ 30619
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/* gvSIG. Geographic Information System of the Valencian Government
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*
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* Copyright (C) 2007-2008 Infrastructures and Transports Department
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* of the Valencian Government (CIT)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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/*
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* AUTHORS (In addition to CIT):
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* 2009 IVER T.I {{Task}}
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*/
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/**
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*
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*/
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package org.gvsig.tools.persistence.xml; |
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import java.io.IOException; |
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import java.util.ArrayList; |
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import java.util.Date; |
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import java.util.HashMap; |
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import java.util.HashSet; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.Set; |
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import org.gvsig.tools.persistence.PersistenceException; |
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import org.gvsig.tools.persistence.PersistenceRuntimeException; |
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import org.gvsig.tools.persistence.impl.ImplementationPersistentState; |
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import org.gvsig.tools.persistence.impl.ObjectReference; |
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import org.gvsig.tools.persistence.impl.PersistentContext; |
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import org.xmlpull.v1.XmlPullParser; |
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import org.xmlpull.v1.XmlPullParserException; |
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/**
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* @author jmvivo
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*
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*/
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public class XMLPersistentStateReader implements XMLPersistentConstants { |
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private XMLPersistenceManager manager;
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private XmlPullParser parser;
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private PersistentContext context;
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public XMLPersistentStateReader(XMLPersistenceManager persistenceManager) {
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this.manager = persistenceManager;
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} |
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public void read(PersistentContext context, XmlPullParser parser) |
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throws PersistenceException {
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this.parser = parser;
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this.context = context;
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try {
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, null, ROOT_TAG);
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parser.nextTag(); |
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this.parser.require(XmlPullParser.START_TAG, null, VERSION_TAG); |
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String persistenceVersion = this.parser.nextText(); |
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if (!persistenceVersion.trim().equals(manager.version().trim())) {
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// TODO handle version
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} |
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parser.require(XmlPullParser.END_TAG, "", VERSION_TAG);
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, "", ROOTSTATE_TAG);
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String rootStateIdStr = this.parser.getAttributeValue("", |
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ROOSTATE_ID_ATTR); |
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if (rootStateIdStr == null){ |
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throw new PersistenceRuntimeException( |
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"missing root state id attribute");
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} |
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parser.nextTag(); |
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this.parser.require(XmlPullParser.END_TAG, "", ROOTSTATE_TAG); |
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parser.nextTag(); |
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this.parser.require(XmlPullParser.START_TAG, "", STATES_TAG); |
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parser.nextTag(); |
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ImplementationPersistentState state; |
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String curTagName, curIdstr, curClassName;
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Integer curId;
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String namespace, stateTagName;
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while (!(parser.getEventType() == XmlPullParser.END_TAG && parser
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.getName().equals(STATES_TAG))) {
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checkDocumentEnd(); |
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parser.require(XmlPullParser.START_TAG, null, null); |
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stateTagName = parser.getName(); |
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namespace = parser.getNamespace(); |
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state = this.manager.createPersistentStateInstance(context);
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curIdstr = parser.getAttributeValue(null, STATE_ID_ATTR);
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if (curIdstr == null){ |
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throw new PersistenceRuntimeException( |
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"missing state "+STATE_ID_ATTR+" attribute (row:"+ |
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parser.getLineNumber()+ |
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" col: "+parser.getColumnNumber()+")"); |
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} |
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try{
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curId = new Integer(curIdstr); |
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} catch (NumberFormatException e) { |
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throw new PersistenceRuntimeException( |
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"invalid state "+STATE_ID_ATTR+" attribute (row:"+ |
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parser.getLineNumber()+ |
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" col: "+parser.getColumnNumber()+")",e); |
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} |
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curClassName = getClassNameFromTag(stateTagName); |
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state.setId(curId); |
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state.setTheClassName(curClassName); |
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context.addReference(curId, state); |
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, null, null); |
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while (!(parser.getEventType() == XmlPullParser.END_TAG && parser
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.getName().equals(stateTagName))) {
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curTagName = parser.getName(); |
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if (VALUE_ITEM_GENERIC.equals(parser.getName())) {
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// Load value with name and value within tags
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loadGenericTagValue(state); |
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} else {
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loadTagValue(state); |
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} |
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parser.require(XmlPullParser.END_TAG, null, curTagName);
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parser.nextTag(); |
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checkDocumentEnd(); |
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} |
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parser.require(XmlPullParser.END_TAG, namespace, stateTagName); |
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parser.nextTag(); |
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} |
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context.setRoot(new Integer(rootStateIdStr)); |
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parser.nextTag(); |
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this.parser.require(XmlPullParser.END_TAG, "", ROOT_TAG); |
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parser.next(); |
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this.parser.require(XmlPullParser.END_DOCUMENT, null, null); |
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} catch (PersistenceException e) {
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throw e;
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} catch (PersistenceRuntimeException e) {
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throw e;
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} catch (Exception e) { |
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throw new PersistenceRuntimeException("Exception in parse input", e); |
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} |
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} |
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private String getClassNameFromTag(String stateTagName) { |
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int index = stateTagName.indexOf(":"); |
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if (index < 1) { |
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return stateTagName;
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} |
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return stateTagName.substring(index + 1); |
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} |
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private void loadTagValue(ImplementationPersistentState state) |
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throws XmlPullParserException, IOException, PersistenceException { |
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String type = parser.getAttributeValue(null, VALUE_TYPE_ATTR); |
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if (type == null) { |
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throw new PersistenceRuntimeException("missing value " |
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+ VALUE_TYPE_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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String name = parser.getName();
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state.setInternal(name, getValue(type)); |
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// position end tag of {name}
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} |
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private void loadGenericTagValue(ImplementationPersistentState state) |
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throws XmlPullParserException, IOException, PersistenceException { |
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String type = parser.getAttributeValue(null, VALUE_TYPE_ATTR); |
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if (type == null) { |
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throw new PersistenceRuntimeException("missing value " |
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+ VALUE_TYPE_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, "", NAMEVALUE_TAG);
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String name = parser.nextText();
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parser.require(XmlPullParser.END_TAG, "", NAMEVALUE_TAG);
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, "", DATAVALUE_TAG);
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state.setInternal(name, getValue(type)); |
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parser.require(XmlPullParser.END_TAG, "", DATAVALUE_TAG);
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parser.nextTag(); |
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// position end tag 'value'
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} |
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private Object getValue(String type) throws XmlPullParserException, |
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IOException, PersistenceException {
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if (type.equals(TYPE_NULL)) {
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parser.nextTag(); |
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return null; |
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} else if (type.equals(TYPE_STRING)) { |
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return parser.nextText();
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} else if (type.equals(TYPE_BOOLEAN)) { |
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return getValueBoolean();
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} else if (type.equals(TYPE_DATE)) { |
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return getValueDate();
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} else if (TYPES_NUMBER.contains(type)) { |
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return getValueNumber(type);
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} else if (type.equals(TYPE_REFERENCE)) { |
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return getValueReference();
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} else if (type.equals(TYPE_LIST)) { |
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return getValueList();
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} else if (type.equals(TYPE_SET)) { |
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return getValueSet();
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} else if (type.equals(TYPE_MAP)) { |
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return getValueMap();
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} else {
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throw new PersistenceRuntimeException("invalid value type: " + type |
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+ " (row:" + parser.getLineNumber() + " col: " |
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+ parser.getColumnNumber() + ")");
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} |
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} |
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private Boolean getValueBoolean() throws XmlPullParserException, |
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IOException {
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String value = parser.nextText();
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// XXX: do any check for valid values ???
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return new Boolean(value); |
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} |
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private Date getValueDate() throws XmlPullParserException, |
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IOException {
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String value = parser.nextText();
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Long time;
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try {
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time = new Long(value); |
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} catch (NumberFormatException e) { |
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throw new PersistenceRuntimeException("invalid value for date (row:" |
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")", e);
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} |
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return new Date(time.longValue()); |
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} |
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private Number getValueNumber(String type) throws XmlPullParserException, |
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IOException {
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String valueStr = parser.nextText();
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Number value = null; |
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try {
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if (TYPE_INTEGER.equals(type)){
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value = new Integer(valueStr); |
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} else if (TYPE_LONG.equals(type)) { |
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value = new Long(valueStr); |
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} else if (TYPE_FLOAT.equals(type)) { |
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value = new Float(valueStr); |
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} else if (TYPE_DOUBLE.equals(type)) { |
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value = new Double(valueStr); |
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} |
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} catch (NumberFormatException e) { |
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throw new PersistenceRuntimeException("invalid value for " + type |
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+ " (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")", e);
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} |
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return value;
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} |
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private ObjectReference getValueReference() throws XmlPullParserException, |
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IOException, PersistenceException {
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, "", REFERENCE_TAG);
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String idstr = parser.getAttributeValue("", REFERENCE_ID_ATTR); |
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if (idstr == null) { |
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throw new PersistenceRuntimeException("missing object reference " |
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+ REFERENCE_ID_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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Integer id;
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try{
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id = new Integer(idstr); |
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} catch (NumberFormatException e) { |
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throw new PersistenceRuntimeException("invalid object reference " |
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+ STATE_ID_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")", e);
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} |
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parser.nextTag(); |
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parser.require(XmlPullParser.END_TAG, "", REFERENCE_TAG);
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parser.nextTag(); |
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return manager.createrObjectReference(id);
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} |
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private List getValueList() throws XmlPullParserException, IOException, |
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PersistenceException {
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parser.nextTag(); |
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List list = new ArrayList(); |
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String type;
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while (parser.getEventType() == XmlPullParser.START_TAG
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&& LISTITEM_TAG.equals(parser.getName())) {
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type = parser.getAttributeValue("", VALUE_TYPE_ATTR);
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if (type == null) { |
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throw new PersistenceRuntimeException("missing list item " |
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+ VALUE_TYPE_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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list.add(getValue(type)); |
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parser.require(XmlPullParser.END_TAG, "", LISTITEM_TAG);
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parser.nextTag(); |
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} |
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return manager.createList(list, context);
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} |
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private Set getValueSet() throws XmlPullParserException, IOException, |
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PersistenceException {
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parser.nextTag(); |
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Set set = new HashSet(); |
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String type;
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while (parser.getEventType() == XmlPullParser.START_TAG
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&& SETITEM_TAG.equals(parser.getName())) {
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type = parser.getAttributeValue("", VALUE_TYPE_ATTR);
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if (type == null) { |
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throw new PersistenceRuntimeException("missing set item " |
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+ VALUE_TYPE_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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set.add(getValue(type)); |
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parser.require(XmlPullParser.END_TAG, "", SETITEM_TAG);
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parser.nextTag(); |
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} |
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return manager.createSet(set, context);
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} |
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private void checkDocumentEnd() throws XmlPullParserException { |
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if (parser.getEventType() == XmlPullParser.END_DOCUMENT) {
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throw new PersistenceRuntimeException("Unspected end of document"); |
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} |
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} |
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private Map getValueMap() throws XmlPullParserException, IOException, |
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PersistenceException {
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parser.nextTag(); |
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Map map = new HashMap(); |
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String keyType, valueType;
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Object key, value;
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while (parser.getEventType() == XmlPullParser.START_TAG
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&& MAPITEM_TAG.equals(parser.getName())) {
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, "", MAPKEY_TAG);
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keyType = parser.getAttributeValue("", VALUE_TYPE_ATTR);
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if (keyType == null) { |
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throw new PersistenceRuntimeException("missing key map item " |
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+ VALUE_TYPE_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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key = getValue(keyType); |
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parser.require(XmlPullParser.END_TAG, "", MAPKEY_TAG);
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parser.nextTag(); |
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parser.require(XmlPullParser.START_TAG, "", MAPVALUE_TAG);
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valueType = parser.getAttributeValue("", VALUE_TYPE_ATTR);
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if (valueType == null) { |
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throw new PersistenceRuntimeException("missing value map item " |
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+ VALUE_TYPE_ATTR + " attribute (row:"
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+ parser.getLineNumber() + " col: "
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+ parser.getColumnNumber() + ")");
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} |
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value = getValue(valueType); |
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parser.require(XmlPullParser.END_TAG, "", MAPVALUE_TAG);
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parser.nextTag(); |
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map.put(key, value); |
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parser.require(XmlPullParser.END_TAG, "", MAPITEM_TAG);
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parser.nextTag(); |
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} |
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return manager.createMap(map, context);
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} |
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} |