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/**
* Copyright (c) 2013, 2016 Angelo ZERR.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* Angelo Zerr <angelo.zerr@gmail.com> - initial API and implementation
*/
package org.eclipse.wst.json.core.internal.schema;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IConfigurationElement;
import org.eclipse.core.runtime.IExtensionPoint;
import org.eclipse.core.runtime.IExtensionRegistry;
import org.eclipse.core.runtime.Platform;
import org.eclipse.json.schema.IJSONSchemaDocument;
import org.eclipse.json.schema.IJSONSchemaProcessor;
import org.eclipse.wst.common.uriresolver.internal.provisional.URIResolverPlugin;
import org.eclipse.wst.common.uriresolver.internal.util.URIHelper;
import org.eclipse.wst.json.core.JSONCorePlugin;
import org.eclipse.wst.json.core.document.IJSONDocument;
import org.eclipse.wst.json.core.document.IJSONModel;
import org.eclipse.wst.json.core.document.IJSONNode;
import org.eclipse.wst.json.core.document.IJSONPair;
import org.eclipse.wst.json.core.document.IJSONValue;
import org.eclipse.wst.json.core.internal.Logger;
import org.eclipse.wst.json.core.util.JSONUtil;
public class SchemaProcessorRegistryReader {
protected static final String EXTENSION_POINT_ID = "schemaProcessors"; //$NON-NLS-1$
protected static final String TAG_CONTRIBUTION = "schemaProcessor"; //$NON-NLS-1$
public static SchemaProcessorRegistryReader INSTANCE = null;
private IJSONSchemaProcessor defaultProcessor;
public static SchemaProcessorRegistryReader getInstance() {
if (INSTANCE == null) {
INSTANCE = new SchemaProcessorRegistryReader();
INSTANCE.readRegistry();
}
return INSTANCE;
}
public IJSONSchemaProcessor getDefaultProcessor() {
return defaultProcessor;
}
public IJSONSchemaDocument getSchemaDocument(IJSONNode node)
throws IOException {
return getSchemaDocument(node.getModel());
}
public IJSONSchemaDocument getSchemaDocument(IJSONModel model)
throws IOException {
IJSONSchemaProcessor processor = getDefaultProcessor();
if (processor == null) {
return null;
}
IJSONDocument document = model.getDocument();
IJSONNode jsonObject = document.getFirstChild();
if (jsonObject != null) {
IJSONNode child = jsonObject.getFirstChild();
while (child != null) {
if (child instanceof IJSONPair) {
IJSONPair pair = (IJSONPair) child;
String name = pair.getName();
IJSONValue valueNode = pair.getValue();
if (valueNode != null && "$schema".equals(name)) { //$NON-NLS-1$
String schema = JSONUtil.getString(valueNode);
try {
if (schema != null) {
schema = URIHelper.addImpliedFileProtocol(schema);
new URL(schema);
return processor.getSchema(schema);
}
} catch (MalformedURLException e) {
}
}
}
child = child.getNextSibling();
}
}
String base = model == null || model.getResolver() == null ?
null : model.getResolver().getFileBaseLocation();
/**
* We shouldn't assert a failure because the catalog does not require a
* base location to operate and it will be called from non-file-based
* scenarios.
*
* https://bugs.eclipse.org/bugs/show_bug.cgi?id=206176
*/
// Assert.isNotNull(base, "Base location is expected to be non null."); //$NON-NLS-1$
if (base != null) {
base = URIHelper.addImpliedFileProtocol(base);
}
String schemaURL = resolve(base, null, null);
if (schemaURL != null) {
return processor.getSchema(schemaURL);
}
return null;
}
private String getFileMatch(String location) {
if (location == null) {
return null;
}
int index = location.lastIndexOf('/');
if (index == -1) {
index = location.lastIndexOf('\\');
}
if (index != -1) {
return location.substring(index, location.length());
}
return location;
}
private String resolve(String base, String publicId, String systemId) {
String result = systemId;
result = URIResolverPlugin.createResolver().resolve(base, publicId,
systemId);
return result;
}
/**
* read from plugin registry and parse it.
*/
protected void readRegistry() {
IExtensionRegistry pluginRegistry = Platform.getExtensionRegistry();
IExtensionPoint point = pluginRegistry
.getExtensionPoint(JSONCorePlugin.getDefault().getBundle()
.getSymbolicName(), EXTENSION_POINT_ID);
if (point != null) {
IConfigurationElement[] elements = point.getConfigurationElements();
for (int i = 0; i < elements.length; i++) {
readElement(elements[i]);
}
}
}
protected void readElement(IConfigurationElement element) {
if (TAG_CONTRIBUTION.equals(element.getName())) {
String id = element.getAttribute("id");
String name = element.getAttribute("name");
try {
IJSONSchemaProcessor schemaProcessor = (IJSONSchemaProcessor) element
.createExecutableExtension("class");
this.defaultProcessor = schemaProcessor;
} catch (CoreException e) {
Logger.logException(e);
}
}
}
}
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