gvsig-projects-pool / org.gvsig.vcsgis / trunk / org.gvsig.vcsgis / org.gvsig.vcsgis.lib / org.gvsig.vcsgis.lib.impl / src / main / java / org / gvsig / vcsgis / lib / SAJParserImpl.java @ 2715
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/*
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* gvSIG. Desktop Geographic Information System.
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*
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* Copyright (C) 2007-2020 gvSIG Association.
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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 3
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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, see <https://www.gnu.org/licenses/>.
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*
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* For any additional information, do not hesitate to contact us
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* at info AT gvsig.com, or visit our website www.gvsig.com.
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*/
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package org.gvsig.vcsgis.lib; |
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import java.io.InputStream; |
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import java.io.Reader; |
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import java.util.ArrayList; |
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import java.util.List; |
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import javax.json.JsonArrayBuilder; |
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import javax.json.JsonException; |
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import javax.json.JsonObjectBuilder; |
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import javax.json.JsonValue; |
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import javax.json.stream.JsonParser; |
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/**
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*
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* @author gvSIG Team
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*/
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public class SAJParserImpl { |
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public interface SAJParserContext { |
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public JsonObjectBuilder getObjectBuilder();
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public JsonArrayBuilder getArrayBuilder();
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public String getName(); |
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public String getAttrName(); |
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public Long getIndex(); |
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public String getPathName(); |
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public void setArrayBuilder(JsonArrayBuilder arrayBuilder); |
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} |
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public interface SAJParserHandler { |
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public void handle(SAJParserContext context, JsonParser.Event e, Object value); |
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} |
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private class SAJParserContextImpl implements SAJParserContext { |
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private JsonObjectBuilder objectBuilder;
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private JsonArrayBuilder arrayBuilder;
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private String name; |
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private Long index; |
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private String attrname; |
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private int stackIndex; |
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private String pathName; |
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public SAJParserContextImpl() {
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} |
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@Override
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public JsonArrayBuilder getArrayBuilder() {
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return arrayBuilder;
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} |
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@Override
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public void setArrayBuilder(JsonArrayBuilder arrayBuilder) { |
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this.arrayBuilder = arrayBuilder;
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} |
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@Override
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public String getName() { |
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return name;
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} |
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@Override
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public String getAttrName() { |
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return attrname;
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} |
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@Override
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public JsonObjectBuilder getObjectBuilder() {
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return objectBuilder;
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} |
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@Override
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public Long getIndex() { |
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return index;
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} |
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@Override
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public String getPathName() { |
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if( this.pathName==null ) { |
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StringBuilder builder = new StringBuilder(); |
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for (int i = 0; i <= this.stackIndex; i++) { |
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if( getContext(i).name != null ) { |
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builder.append("/");
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builder.append(getContext(i).name); |
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} else if( getContext(i).index != null ) { |
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builder.append("/?");
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// builder.append(getContext(i).index);
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} else if( i!=0 ) { |
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builder.append("/?");
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} |
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} |
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this.pathName = builder.toString();
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} |
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return this.pathName; |
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} |
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} |
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private final JsonParser parser; |
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private final SAJParserHandler handler; |
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private final List<SAJParserContextImpl> contextsStack; |
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public SAJParserImpl(InputStream is, SAJParserHandler handler) { |
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this(javax.json.Json.createParser(is), handler);
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} |
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public SAJParserImpl(Reader reader, SAJParserHandler handler) { |
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this(javax.json.Json.createParser(reader), handler);
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} |
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public SAJParserImpl(JsonParser parser, SAJParserHandler handler) {
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this.parser = parser;
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this.handler = handler;
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this.contextsStack = new ArrayList(10); |
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} |
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private SAJParserContextImpl getContext(int index) { |
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return this.contextsStack.get(index); |
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} |
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public JsonParser getParser() {
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return parser;
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} |
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public void close() { |
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this.parser.close();
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} |
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private JsonObjectBuilder createObjectBuilder() {
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return javax.json.Json.createObjectBuilder();
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} |
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private JsonArrayBuilder createArrayBuilder() {
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return javax.json.Json.createArrayBuilder();
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} |
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private SAJParserContextImpl createContext(JsonObjectBuilder objectBuilder, String name) { |
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return createContext(objectBuilder, null, name, null); |
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} |
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private SAJParserContextImpl createContext(JsonArrayBuilder arrayBuilder, String name) { |
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return createContext(null, arrayBuilder, name, null); |
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} |
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private SAJParserContextImpl createContext(JsonArrayBuilder arrayBuilder, long index) { |
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return createContext(null, arrayBuilder, null, index); |
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} |
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private SAJParserContextImpl createContext(JsonObjectBuilder objectBuilder, long index) { |
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return createContext(objectBuilder, null, null, index); |
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} |
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private SAJParserContextImpl createContext(JsonArrayBuilder arrayBuilder) {
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return createContext(null, arrayBuilder, null, null); |
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} |
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private SAJParserContextImpl createContext(JsonObjectBuilder objectBuilder) {
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return createContext(objectBuilder, null, null, null); |
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} |
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private SAJParserContextImpl createContext(JsonObjectBuilder objectBuilder, JsonArrayBuilder arrayBuilder, String name, Long index) { |
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SAJParserContextImpl context = new SAJParserContextImpl();
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context.arrayBuilder = arrayBuilder; |
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context.objectBuilder = objectBuilder; |
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context.name = name; |
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context.index = index; |
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this.contextsStack.add(context);
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context.stackIndex = this.contextsStack.size()-1; |
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return context;
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} |
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private void deleteContext(SAJParserContextImpl context) { |
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this.contextsStack.remove(context.stackIndex);
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if( context.stackIndex!=this.contextsStack.size() ) { |
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for (int i = 0; i < contextsStack.size(); i++) { |
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contextsStack.get(i).stackIndex = i; |
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contextsStack.get(i).pathName = null;
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} |
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} |
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} |
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public void parse() { |
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if (parser.hasNext()) {
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JsonParser.Event e = parser.next(); |
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if (e == JsonParser.Event.START_ARRAY) {
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SAJParserContextImpl context = createContext(createArrayBuilder()); |
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this.handler.handle(context, e, null); |
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this.readArray(context);
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deleteContext(context); |
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} else if (e == JsonParser.Event.START_OBJECT) { |
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SAJParserContextImpl context = createContext(createObjectBuilder()); |
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this.handler.handle(context, e, null); |
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this.readObject(context);
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deleteContext(context); |
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} |
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} |
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} |
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private void readArray(SAJParserContextImpl context) { |
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SAJParserContextImpl context2; |
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context.index = 0L;
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while(parser.hasNext()) {
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JsonParser.Event e = parser.next(); |
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switch (e) {
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case START_ARRAY:
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context2 = createContext(createArrayBuilder(), context.index); |
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this.handler.handle(context2, e, context2.arrayBuilder);
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this.readArray(context2);
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if( context.arrayBuilder!=null ) { |
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if( context2.arrayBuilder==null ) { |
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context.arrayBuilder.addNull(); |
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} else {
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context.arrayBuilder.add(context2.arrayBuilder); |
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} |
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} |
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deleteContext(context2); |
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break;
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case START_OBJECT:
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context2 = createContext(createObjectBuilder(), context.index); |
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this.handler.handle(context2, e, context2.objectBuilder);
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this.readObject(context2);
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if( context.arrayBuilder!=null ) { |
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if( context2.objectBuilder==null ) { |
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context.arrayBuilder.addNull(); |
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} else {
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context.arrayBuilder.add(context2.objectBuilder); |
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} |
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} |
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deleteContext(context2); |
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break;
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case VALUE_STRING:
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this.handler.handle(context, e, parser.getString());
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if( context.arrayBuilder!=null ) { |
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context.arrayBuilder.add(parser.getString()); |
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} |
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break;
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case VALUE_NUMBER:
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if (parser.isIntegralNumber()) { // FIXME: BigInteger are truncateds |
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this.handler.handle(context, e, parser.getInt());
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if( context.arrayBuilder!=null ) { |
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context.arrayBuilder.add(parser.getInt()); |
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} |
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} else {
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this.handler.handle(context, e, parser.getBigDecimal());
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if( context.arrayBuilder!=null ) { |
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context.arrayBuilder.add(parser.getBigDecimal()); |
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} |
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} |
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break;
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case VALUE_TRUE:
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this.handler.handle(context, e, true); |
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if( context.arrayBuilder!=null ) { |
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context.arrayBuilder.add(JsonValue.TRUE); |
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} |
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break;
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case VALUE_FALSE:
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this.handler.handle(context, e, false); |
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if( context.arrayBuilder!=null ) { |
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context.arrayBuilder.add(JsonValue.FALSE); |
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} |
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break;
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case VALUE_NULL:
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this.handler.handle(context, e, null); |
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if( context.arrayBuilder!=null ) { |
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context.arrayBuilder.add(JsonValue.NULL); |
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} |
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break;
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case END_ARRAY:
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this.handler.handle(context, e, context.arrayBuilder);
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return;
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default:
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throw new JsonException("Internal Error"); |
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} |
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context.index += 1L;
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} |
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throw new JsonException("Internal Error"); |
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} |
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private void readObject(SAJParserContextImpl context) { |
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SAJParserContextImpl context2; |
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while(parser.hasNext()) {
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JsonParser.Event e = parser .next(); |
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switch (e) {
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case START_ARRAY:
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context2 = createContext(createArrayBuilder(), context.attrname); |
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this.handler.handle(context2, e, context2.arrayBuilder);
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this.readArray(context2);
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if( context.objectBuilder!=null ) { |
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if( context2.arrayBuilder==null ) { |
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context.objectBuilder.addNull(context.attrname); |
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} else {
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context.objectBuilder.add(context.attrname, context2.arrayBuilder); |
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} |
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} |
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deleteContext(context2); |
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break;
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case START_OBJECT:
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context2 = createContext(createObjectBuilder(), context.attrname); |
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this.handler.handle(context2, e, context2.objectBuilder);
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this.readObject(context2);
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if( context.objectBuilder!=null ) { |
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if( context2.objectBuilder==null ) { |
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context.objectBuilder.addNull(context.attrname); |
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} else {
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context.objectBuilder.add(context.attrname, context2.objectBuilder); |
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} |
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} |
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deleteContext(context2); |
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break;
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case KEY_NAME:
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context.attrname = parser.getString(); |
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break;
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case VALUE_STRING:
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this.handler.handle(context, e, parser.getString());
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if( context.objectBuilder!=null ) { |
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context.objectBuilder.add(context.attrname, parser.getString()); |
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} |
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break;
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case VALUE_NUMBER:
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if (parser.isIntegralNumber()) { // FIXME: BigInteger are truncateds |
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this.handler.handle(context, e, parser.getInt());
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if( context.objectBuilder!=null ) { |
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context.objectBuilder.add(context.attrname, parser.getInt()); |
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} |
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} else {
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this.handler.handle(context, e, parser.getBigDecimal());
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if( context.objectBuilder!=null ) { |
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context.objectBuilder.add(context.attrname, parser.getBigDecimal()); |
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} |
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} |
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break;
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case VALUE_TRUE:
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this.handler.handle(context, e, true); |
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if( context.objectBuilder!=null ) { |
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context.objectBuilder.add(context.attrname, JsonValue.TRUE); |
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} |
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break;
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case VALUE_FALSE:
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this.handler.handle(context, e, false); |
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if( context.objectBuilder!=null ) { |
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context.objectBuilder.add(context.attrname, JsonValue.FALSE); |
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} |
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break;
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case VALUE_NULL:
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this.handler.handle(context, e, null); |
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if( context.objectBuilder!=null ) { |
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context.objectBuilder.addNull(context.attrname); |
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} |
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break;
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case END_OBJECT:
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context.attrname = null;
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this.handler.handle(context, e, context.objectBuilder);
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return;
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default:
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throw new JsonException("Internal Error"); |
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} |
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} |
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throw new JsonException("Internal Error"); |
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} |
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} |