com.googlecode.jsonschema2pojo.SchemaStore Maven / Gradle / Ivy
/**
* Copyright © 2010-2011 Nokia
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.googlecode.jsonschema2pojo;
import static org.apache.commons.lang.StringUtils.*;
import java.io.File;
import java.io.IOException;
import java.net.URI;
import java.util.HashMap;
import java.util.Map;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.googlecode.jsonschema2pojo.exception.GenerationException;
public class SchemaStore {
private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper();
private Map schemas = new HashMap();
private FragmentResolver fragmentResolver = new FragmentResolver();
/**
* Create or look up a new schema which has the given ID and read the
* contents of the given ID as a URL. If a schema with the given ID is
* already known, then a reference to the original schema will be returned.
*
* @param id
* the id of the schema being created
* @return a schema object containing the contents of the given path
*/
public synchronized Schema create(URI id) {
if (!schemas.containsKey(id)) {
try {
JsonNode content = OBJECT_MAPPER.readTree(new File(removeFragment(id)));
if (id.toString().contains("#")) {
content = fragmentResolver.resolve(content, '#' + substringAfter(id.toString(), "#"));
}
schemas.put(id, new Schema(id, content));
} catch (IOException e) {
throw new GenerationException("Error with schema: " + id, e);
}
}
return schemas.get(id);
}
private URI removeFragment(URI id) {
return URI.create(substringBefore(id.toString(), "#"));
}
/**
* Create or look up a new schema using the given schema as a parent and the
* path as a relative reference. If a schema with the given parent and
* relative path is already known, then a reference to the original schema
* will be returned.
*
* @param parent
* the schema which is the parent of the schema to be created.
* @param path
* the relative path of this schema (will be used to create a
* complete URI by resolving this path against the parent
* schema's id)
* @return a schema object containing the contents of the given path
*/
public Schema create(Schema parent, String path) {
if (path.equals("#")) {
return parent;
}
path = stripEnd(path, "#?&/");
URI id = (parent == null || parent.getId() == null) ? URI.create(path) : parent.getId().resolve(path);
return create(id);
}
public synchronized void clearCache() {
schemas.clear();
}
}