com.jayway.jsonpath.internal.JsonReader Maven / Gradle / Ivy
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Java port of Stefan Goessner JsonPath.
/*
* Copyright 2011 the original author or authors.
* 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.jayway.jsonpath.internal;
import com.jayway.jsonpath.Configuration;
import com.jayway.jsonpath.DocumentContext;
import com.jayway.jsonpath.EvaluationListener;
import com.jayway.jsonpath.JsonPath;
import com.jayway.jsonpath.ParseContext;
import com.jayway.jsonpath.Predicate;
import com.jayway.jsonpath.ReadContext;
import com.jayway.jsonpath.TypeRef;
import com.jayway.jsonpath.spi.http.HttpProviderFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import static com.jayway.jsonpath.JsonPath.compile;
import static com.jayway.jsonpath.internal.Utils.notEmpty;
import static com.jayway.jsonpath.internal.Utils.notNull;
public class JsonReader implements ParseContext, DocumentContext {
private final Configuration configuration;
private Object json;
public JsonReader() {
this(Configuration.defaultConfiguration());
}
public JsonReader(Configuration configuration) {
notNull(configuration, "configuration can not be null");
this.configuration = configuration;
}
private JsonReader(Object json, Configuration configuration) {
notNull(json, "json can not be null");
notNull(configuration, "configuration can not be null");
this.configuration = configuration;
this.json = json;
}
//------------------------------------------------
//
// ParseContext impl
//
//------------------------------------------------
@Override
public DocumentContext parse(Object json) {
notNull(json, "json object can not be null");
this.json = json;
return this;
}
@Override
public DocumentContext parse(String json) {
notEmpty(json, "json string can not be null or empty");
this.json = configuration.jsonProvider().parse(json);
return this;
}
@Override
public DocumentContext parse(InputStream json) {
return parse(json, "UTF-8");
}
@Override
public DocumentContext parse(InputStream json, String charset) {
notNull(json, "json input stream can not be null");
notNull(json, "charset can not be null");
try {
this.json = configuration.jsonProvider().parse(json, charset);
return this;
} finally {
Utils.closeQuietly(json);
}
}
@Override
public DocumentContext parse(File json) throws IOException {
notNull(json, "json file can not be null");
FileInputStream fis = null;
try {
fis = new FileInputStream(json);
parse(fis);
} finally {
Utils.closeQuietly(fis);
}
return this;
}
@Override
public DocumentContext parse(URL json) throws IOException {
notNull(json, "json url can not be null");
InputStream is = HttpProviderFactory.getProvider().get(json);
return parse(is);
}
@Override
public Configuration configuration() {
return configuration;
}
//------------------------------------------------
//
// ReadContext impl
//
//------------------------------------------------
@Override
public Object json() {
return json;
}
@Override
public T read(String path, Predicate... filters) {
notEmpty(path, "path can not be null or empty");
return read(compile(path, filters));
}
@Override
public T read(String path, Class type, Predicate... filters) {
return convert(read(path, filters), type, configuration);
}
@Override
public T read(JsonPath path) {
notNull(path, "path can not be null");
return path.read(json, configuration);
}
@Override
public T read(JsonPath path, Class type) {
return convert(read(path), type, configuration);
}
@Override
public T read(JsonPath path, TypeRef type) {
return convert(read(path), type, configuration);
}
@Override
public T read(String path, TypeRef type) {
return convert(read(path), type, configuration);
}
public ReadContext limit(int maxResults){
return withListeners(new LimitingEvaluationListener(maxResults));
}
public ReadContext withListeners(EvaluationListener... listener){
return new JsonReader(json, configuration.setEvaluationListeners(listener));
}
private T convert(Object obj, Class targetType, Configuration configuration){
return configuration.mappingProvider().map(obj, targetType, configuration);
}
private T convert(Object obj, TypeRef targetType, Configuration configuration){
return configuration.mappingProvider().map(obj, targetType, configuration);
}
@Override
public DocumentContext set(String path, Object newValue, Predicate... filters) {
return set(compile(path, filters), newValue);
}
@Override
public DocumentContext set(JsonPath path, Object newValue){
Object modifiedJson = path.set(json, newValue, configuration);
return new JsonReader(modifiedJson, configuration);
}
@Override
public DocumentContext delete(String path, Predicate... filters) {
return delete(compile(path, filters));
}
@Override
public DocumentContext delete(JsonPath path) {
Object modifiedJson = path.delete(json, configuration);
return new JsonReader(modifiedJson, configuration);
}
@Override
public DocumentContext add(String path, Object value, Predicate... filters){
return add(compile(path, filters), value);
}
@Override
public DocumentContext add(JsonPath path, Object value){
Object modifiedJson = path.add(json, value, configuration);
return new JsonReader(modifiedJson, configuration);
}
@Override
public DocumentContext put(String path, String key, Object value, Predicate... filters){
return put(compile(path, filters), key, value);
}
@Override
public DocumentContext put(JsonPath path, String key, Object value){
Object modifiedJson = path.put(json, key, value, configuration);
return new JsonReader(modifiedJson, configuration);
}
private final class LimitingEvaluationListener implements EvaluationListener {
final int limit;
private LimitingEvaluationListener(int limit) {
this.limit = limit;
}
@Override
public EvaluationContinuation resultFound(FoundResult found) {
if(found.index() == limit - 1){
return EvaluationContinuation.ABORT;
} else {
return EvaluationContinuation.CONTINUE;
}
}
}
}