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org.openapitools.codegen.utils.JsonCacheImpl Maven / Gradle / Ivy
/*
* Copyright 2019 OpenAPI-Generator Contributors (https://openapi-generator.tech)
*
* 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
*
* https://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 org.openapitools.codegen.utils;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.ArrayDeque;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Deque;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Objects;
import java.util.regex.Pattern;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.fasterxml.jackson.core.JsonPointer;
import com.fasterxml.jackson.databind.DeserializationFeature;
import com.fasterxml.jackson.databind.JsonNode;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.SerializationFeature;
import com.fasterxml.jackson.databind.node.ArrayNode;
import com.fasterxml.jackson.databind.node.ContainerNode;
import com.fasterxml.jackson.databind.node.JsonNodeFactory;
import com.fasterxml.jackson.databind.node.JsonNodeType;
import com.fasterxml.jackson.databind.node.ObjectNode;
import com.fasterxml.jackson.databind.node.POJONode;
/**
* A cache implementation for loading, querying, mutating and saving a JSON object graph.
*
* @author Adrian Price, TIBCO Software Inc.
* @since 4.0.0
*/
class JsonCacheImpl implements JsonCache.Root {
/**
* Manages a sub-tree of a parent cache, identified by a base pointer rooted.
*/
private static class ChildCacheImpl implements JsonCache {
private final JsonPointer basePtr;
private final JsonCache parent;
private ChildCacheImpl(JsonCache parent, JsonPointer basePtr) {
this.parent = parent;
this.basePtr = basePtr;
}
@Override
public JsonCache add(JsonPointer ptr, BigDecimal value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, BigInteger value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, boolean value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, double value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, float value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, int value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, long value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, Object value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(JsonPointer ptr, short value) throws CacheException {
parent.add(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache add(String path, BigDecimal value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, BigInteger value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, boolean value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, double value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, float value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, int value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, long value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, Object value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache add(String path, short value) throws CacheException {
parent.add(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache child(JsonPointer basePtr) {
return new ChildCacheImpl(this, basePtr);
}
@Override
public JsonCache child(String path) {
return child(JsonPointer.compile(path));
}
@Override
public void delete(JsonPointer ptr) throws CacheException {
parent.delete(basePtr.append(ptr));
}
@Override
public void delete(String path) throws CacheException {
parent.delete(basePtr.append(JsonPointer.compile(path)));
}
@Override
public boolean exists(JsonPointer ptr) {
return parent.exists(basePtr.append(ptr));
}
@Override
public boolean exists(String path) {
return parent.exists(basePtr.append(JsonPointer.compile(path)));
}
@Override
public Object get(JsonPointer ptr) throws CacheException {
return parent.get(basePtr.append(ptr));
}
@Override
public Object get(JsonPointer ptr, Object defaultValue) throws CacheException {
return parent.get(basePtr.append(ptr), defaultValue);
}
@Override
public Object get(String path) throws CacheException {
return parent.get(basePtr.append(JsonPointer.compile(path)));
}
@Override
public Object get(String path, Object defaultValue) throws CacheException {
return parent.get(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public BigDecimal getBigDecimal(JsonPointer ptr) throws CacheException {
return parent.getBigDecimal(basePtr.append(ptr));
}
@Override
public BigDecimal getBigDecimal(JsonPointer ptr, BigDecimal defaultValue) throws CacheException {
return parent.getBigDecimal(basePtr.append(ptr), defaultValue);
}
@Override
public BigDecimal getBigDecimal(String path) throws CacheException {
return parent.getBigDecimal(basePtr.append(JsonPointer.compile(path)));
}
@Override
public BigDecimal getBigDecimal(String path, BigDecimal defaultValue) throws CacheException {
return parent.getBigDecimal(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public BigInteger getBigInteger(JsonPointer ptr) throws CacheException {
return parent.getBigInteger(basePtr.append(ptr));
}
@Override
public BigInteger getBigInteger(JsonPointer ptr, BigInteger defaultValue) throws CacheException {
return parent.getBigInteger(basePtr.append(ptr), defaultValue);
}
@Override
public BigInteger getBigInteger(String path) throws CacheException {
return parent.getBigInteger(basePtr.append(JsonPointer.compile(path)));
}
@Override
public BigInteger getBigInteger(String path, BigInteger defaultValue) throws CacheException {
return parent.getBigInteger(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public byte[] getBinary(JsonPointer ptr) throws CacheException {
return parent.getBinary(basePtr.append(ptr));
}
@Override
public byte[] getBinary(JsonPointer ptr, byte[] defaultValue) throws CacheException {
return parent.getBinary(basePtr.append(ptr), defaultValue);
}
@Override
public byte[] getBinary(String path) throws CacheException {
return parent.getBinary(basePtr.append(JsonPointer.compile(path)));
}
@Override
public byte[] getBinary(String path, byte[] defaultValue) throws CacheException {
return parent.getBinary(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public boolean getBoolean(JsonPointer ptr) throws CacheException {
return parent.getBoolean(basePtr.append(ptr));
}
@Override
public boolean getBoolean(JsonPointer ptr, boolean defaultValue) throws CacheException {
return parent.getBoolean(basePtr.append(ptr), defaultValue);
}
@Override
public boolean getBoolean(String path) throws CacheException {
return parent.getBoolean(basePtr.append(JsonPointer.compile(path)));
}
@Override
public boolean getBoolean(String path, boolean defaultValue) throws CacheException {
return parent.getBoolean(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public double getDouble(JsonPointer ptr) throws CacheException {
return parent.getDouble(basePtr.append(ptr));
}
@Override
public double getDouble(JsonPointer ptr, double defaultValue) throws CacheException {
return parent.getDouble(basePtr.append(ptr), defaultValue);
}
@Override
public double getDouble(String path) throws CacheException {
return parent.getDouble(basePtr.append(JsonPointer.compile(path)));
}
@Override
public double getDouble(String path, double defaultValue) throws CacheException {
return parent.getDouble(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public float getFloat(JsonPointer ptr) throws CacheException {
return parent.getFloat(basePtr.append(ptr));
}
@Override
public float getFloat(JsonPointer ptr, float defaultValue) throws CacheException {
return parent.getFloat(basePtr.append(ptr), defaultValue);
}
@Override
public float getFloat(String path) throws CacheException {
return parent.getFloat(basePtr.append(JsonPointer.compile(path)));
}
@Override
public float getFloat(String path, float defaultValue) throws CacheException {
return parent.getFloat(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public int getInt(JsonPointer ptr) throws CacheException {
return parent.getInt(basePtr.append(ptr));
}
@Override
public int getInt(JsonPointer ptr, int defaultValue) throws CacheException {
return parent.getInt(basePtr.append(ptr), defaultValue);
}
@Override
public int getInt(String path) throws CacheException {
return parent.getInt(basePtr.append(JsonPointer.compile(path)));
}
@Override
public int getInt(String path, int defaultValue) throws CacheException {
return parent.getInt(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public long getLong(JsonPointer ptr) throws CacheException {
return parent.getLong(basePtr.append(ptr));
}
@Override
public long getLong(JsonPointer ptr, long defaultValue) throws CacheException {
return parent.getLong(basePtr.append(ptr), defaultValue);
}
@Override
public long getLong(String path) throws CacheException {
return parent.getLong(basePtr.append(JsonPointer.compile(path)));
}
@Override
public long getLong(String path, long defaultValue) throws CacheException {
return parent.getLong(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public JsonNodeType getNodeType(JsonPointer ptr) {
return parent.getNodeType(basePtr.append(ptr));
}
@Override
public JsonNodeType getNodeType(String path) {
return parent.getNodeType(basePtr.append(JsonPointer.compile(path)));
}
@Override
public Number getNumber(JsonPointer ptr) throws CacheException {
return parent.getNumber(basePtr.append(ptr));
}
@Override
public Number getNumber(JsonPointer ptr, Number defaultValue) throws CacheException {
return parent.getNumber(basePtr.append(ptr), defaultValue);
}
@Override
public Number getNumber(String path) throws CacheException {
return parent.getNumber(basePtr.append(JsonPointer.compile(path)));
}
@Override
public Number getNumber(String path, Number defaultValue) throws CacheException {
return parent.getNumber(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public T getObject(JsonPointer ptr, Class type) throws CacheException {
return parent.getObject(basePtr.append(ptr), type);
}
@Override
public T getObject(JsonPointer ptr, T defaultValue) throws CacheException {
return parent.getObject(basePtr.append(ptr), defaultValue);
}
@Override
public T getObject(String path, Class type) throws CacheException {
return parent.getObject(basePtr.append(JsonPointer.compile(path)), type);
}
@Override
public T getObject(String path, T defaultValue) throws CacheException {
return parent.getObject(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public List getObjects(JsonPointer ptr, Class type) throws CacheException {
return parent.getObjects(basePtr.append(ptr), type);
}
@Override
public List getObjects(JsonPointer ptr, Class type, List defaultValue) throws CacheException {
return parent.getObjects(basePtr.append(ptr), type, defaultValue);
}
@Override
public List getObjects(String path, Class type) throws CacheException {
return parent.getObjects(basePtr.append(JsonPointer.compile(path)), type);
}
@Override
public List getObjects(String path, Class type, List defaultValue) throws CacheException {
return parent.getObjects(basePtr.append(JsonPointer.compile(path)), type, defaultValue);
}
@Override
public short getShort(JsonPointer ptr) throws CacheException {
return parent.getShort(basePtr.append(ptr));
}
@Override
public short getShort(JsonPointer ptr, short defaultValue) throws CacheException {
return parent.getShort(basePtr.append(ptr), defaultValue);
}
@Override
public short getShort(String path) throws CacheException {
return parent.getShort(basePtr.append(JsonPointer.compile(path)));
}
@Override
public short getShort(String path, short defaultValue) throws CacheException {
return parent.getShort(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public String getString(JsonPointer ptr) throws CacheException {
return parent.getString(basePtr.append(ptr));
}
@Override
public String getString(JsonPointer ptr, String defaultValue) throws CacheException {
return parent.getString(basePtr.append(ptr), defaultValue);
}
@Override
public String getString(String path) throws CacheException {
return parent.getString(basePtr.append(JsonPointer.compile(path)));
}
@Override
public String getString(String path, String defaultValue) throws CacheException {
return parent.getString(basePtr.append(JsonPointer.compile(path)), defaultValue);
}
@Override
public JsonCache parent() {
return parent;
}
@Override
public Root root() {
return parent.root();
}
@Override
public JsonCache set(JsonPointer ptr, BigDecimal value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, BigInteger value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, boolean value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, double value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, float value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, int value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, List values) throws CacheException {
parent.set(basePtr.append(ptr), values);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, long value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, Object value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, short value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(JsonPointer ptr, String value) throws CacheException {
parent.set(basePtr.append(ptr), value);
return this;
}
@Override
public JsonCache set(String path, BigDecimal value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, BigInteger value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, boolean value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, double value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, float value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, int value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, List values) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), values);
return this;
}
@Override
public JsonCache set(String path, long value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, Object value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, short value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public JsonCache set(String path, String value) throws CacheException {
parent.set(basePtr.append(JsonPointer.compile(path)), value);
return this;
}
@Override
public int size(JsonPointer ptr) {
return parent.size(basePtr.append(ptr));
}
@Override
public int size(String path) {
return parent.size(basePtr.append(JsonPointer.compile(path)));
}
@Override
public String toString() {
JsonNode node;
try {
node = getObject(EMPTY_PTR, JsonNode.class);
} catch (CacheException e) {
LOGGER.error("", e);
node = null;
}
return "ChildCacheImpl [basePtr=" + basePtr + ", node=" + node + ']';
}
}
static class FactoryImpl implements JsonCache.Factory {
static final JsonCache.Factory instance = new FactoryImpl();
private final Map instances = new HashMap<>();
@Override
public Root create() {
return new JsonCacheImpl();
}
@Override
public Root get(String key) {
synchronized (instances) {
JsonCacheImpl instance = instances.get(key);
if (instance == null) {
instance = new JsonCacheImpl();
instances.put(key, instance);
}
return instance;
}
}
}
protected static final JsonPointer EMPTY_PTR = JsonPointer.compile("/");
private static final Pattern INTEGER = Pattern.compile("^\\d+$");
protected static final Logger LOGGER = LoggerFactory.getLogger(JsonCacheImpl.class);
protected boolean isDirty;
protected boolean isLoaded;
protected ObjectMapper mapper;
protected MergePolicy mergePolicy = MergePolicy.MERGE_RECURSIVE;
protected ContainerNode root;
private boolean shutdownHookRegistered;
protected JsonCacheImpl() {
mapper = new ObjectMapper();
mapper.enable(SerializationFeature.INDENT_OUTPUT);
mapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
}
@Override
public JsonCache add(JsonPointer ptr, BigDecimal value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, BigInteger value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, boolean value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, double value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, float value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, int value) {
return add(ptr, nodeFor(value));
}
protected JsonCache add(JsonPointer ptr, JsonNode node) {
// If ptr ends with an array index, this implies inserting at the specified index.
// If ptr does not end with an array index, this implies appending to the end of the array.
// In both cases the array in question and its ancestors must be created if they do not already exist.
String lastProperty = ptr.last().getMatchingProperty();
boolean isIndexed = isInteger(lastProperty);
ContainerNode container = ensureContainerExists(ptr, !isIndexed);
switch (container.getNodeType()) {
case ARRAY:
ArrayNode array = (ArrayNode) container;
int index = isIndexed ? Integer.parseInt(lastProperty) : array.size();
if (index < array.size()) {
array.insert(index, node);
} else {
// Fill any gap between current size and index with nulls (Jackson doesn't support sparse arrays).
for (int i = array.size(); i < index; i++)
array.add(array.nullNode());
array.add(node);
}
break;
default:
throw new IllegalArgumentException(ptr + " does not identify an array");
}
setDirty();
return this;
}
@Override
public JsonCache add(JsonPointer ptr, long value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, Object value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(JsonPointer ptr, short value) {
return add(ptr, nodeFor(value));
}
@Override
public JsonCache add(String path, BigDecimal value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, BigInteger value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, boolean value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, double value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, float value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, int value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, long value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, Object value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache add(String path, short value) {
return add(JsonPointer.compile(path), value);
}
@Override
public JsonCache child(JsonPointer basePtr) {
return new ChildCacheImpl(this, basePtr);
}
@Override
public JsonCache child(String path) {
return child(JsonPointer.compile(path));
}
@Override
public void delete(JsonPointer ptr) {
JsonPointer head = ptr.head();
if (head == null) {
root = null;
} else if (root != null) {
JsonNode parent = root.at(head);
if (parent.isArray()) {
((ArrayNode) parent).remove(Integer.parseInt(ptr.last().getMatchingProperty()));
} else if (parent.isObject()) {
((ObjectNode) parent).remove(ptr.last().getMatchingProperty());
} else {
throw new IllegalArgumentException(ptr + " does not identify a deletable node");
}
}
setDirty();
}
@Override
public void delete(String path) {
delete(JsonPointer.compile(path));
}
/**
* Ensures that a suitable container exists for the specified JSON pointer.
*
* @param ptr A JSON Pointer to the property to set.
* @return The container that owns the property identified by path.
*/
protected ContainerNode ensureContainerExists(JsonPointer ptr) {
return ensureContainerExists(ptr, false);
}
/**
* Ensures that all ancestor containers exist for the specified JSON pointer.
*
* @param ptr A JSON Pointer to the property to set.
* @param forceArray true to create an array for the last segment of the pointer if it is non-integral.
* @return The container that owns the property identified by path.
*/
protected ContainerNode ensureContainerExists(JsonPointer ptr, boolean forceArray) {
if (root == null) {
root = isInteger(ptr.getMatchingProperty()) // split
? JsonNodeFactory.instance.arrayNode()
: JsonNodeFactory.instance.objectNode();
}
String lastProperty = ptr.last().getMatchingProperty();
Deque stack = new ArrayDeque<>();
JsonPointer ancestorPtr = forceArray && !isInteger(lastProperty) ? ptr : ptr.head();
JsonNode ancestor = root.at(ancestorPtr);
while (ancestor.isMissingNode()) {
stack.push(ancestorPtr.last().getMatchingProperty());
ancestorPtr = ancestorPtr.head();
ancestor = root.at(ancestorPtr);
}
if (!ancestor.isContainerNode())
throw new IllegalArgumentException(ancestorPtr + " does not identify a container node");
while (!stack.isEmpty()) {
String ancestorProperty = stack.pop();
String childProperty = stack.isEmpty() // split
? forceArray && !isInteger(lastProperty) // split
? "0" // split
: lastProperty // split
: stack.peek();
// Parent can be array or object; child can be array or object - that's four possible combinations.
// Infer the child container type from the child property name: an integer pattern implies an array node.
if (isInteger(childProperty)) {
switch (ancestor.getNodeType()) {
case ARRAY:
// ARRAY/ARRAY
ancestor = ((ArrayNode) ancestor).insertArray(Integer.parseInt(ancestorProperty));
break;
case OBJECT:
// OBJECT/ARRAY
ancestor = ((ObjectNode) ancestor).putArray(ancestorProperty);
break;
default:
throw new IllegalArgumentException(ancestorProperty + " does not identify an array node");
}
} else {
switch (ancestor.getNodeType()) {
case ARRAY:
// ARRAY/OBJECT
ancestor = ((ArrayNode) ancestor).insertObject(Integer.parseInt(ancestorProperty));
break;
case OBJECT:
// OBJECT/OBJECT
ancestor = ((ObjectNode) ancestor).putObject(ancestorProperty);
break;
default:
throw new IllegalArgumentException(ancestorProperty + " does not identify an array node");
}
}
setDirty();
}
return (ContainerNode) ancestor;
}
@Override
public boolean exists(JsonPointer ptr) {
return root != null && !root.at(ptr).isMissingNode();
}
@Override
public boolean exists(String path) {
return exists(JsonPointer.compile(path));
}
@Override
public Root flush(File file) throws CacheException {
if (isDirty)
save(file);
return this;
}
@Override
public Root flush(OutputStream out) throws CacheException {
if (isDirty)
save(out);
return this;
}
@Override
public Root flushOnShutdown(final File file) {
if (!shutdownHookRegistered) {
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
try {
flush(file);
} catch (CacheException e) {
e.printStackTrace();
}
}
});
shutdownHookRegistered = true;
}
return this;
}
@Override
public Root flushOnShutdown(final OutputStream out) {
if (!shutdownHookRegistered) {
Runtime.getRuntime().addShutdownHook(new Thread() {
@Override
public void run() {
try {
flush(out);
} catch (CacheException e) {
e.printStackTrace();
}
}
});
shutdownHookRegistered = true;
}
return this;
}
@Override
public Object get(JsonPointer ptr) throws CacheException {
Object result;
if (root == null) {
result = null;
} else {
try {
JsonNode node = root.at(ptr);
switch (node.getNodeType()) {
case ARRAY:
case OBJECT:
result = node;
break;
case BINARY:
result = node.binaryValue();
break;
case BOOLEAN:
result = node.booleanValue();
break;
case NUMBER:
result = node.numberValue();
break;
case POJO:
result = ((POJONode) node).getPojo();
break;
case STRING:
result = node.textValue();
break;
default:
result = null;
break;
}
} catch (IOException e) {
throw new CacheException(e);
}
}
return result;
}
@Override
public Object get(JsonPointer ptr, Object defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
Object result;
if (exists(ptr)) {
result = get(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public Object get(String path) throws CacheException {
return get(JsonPointer.compile(path));
}
@Override
public Object get(String path, Object defaultValue) throws CacheException {
return get(JsonPointer.compile(path), defaultValue);
}
@Override
public BigDecimal getBigDecimal(JsonPointer ptr) {
return root == null ? null : root.at(ptr).decimalValue();
}
@Override
public BigDecimal getBigDecimal(JsonPointer ptr, BigDecimal defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
BigDecimal result;
if (exists(ptr)) {
result = getBigDecimal(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public BigDecimal getBigDecimal(String path) {
return getBigDecimal(JsonPointer.compile(path));
}
@Override
public BigDecimal getBigDecimal(String path, BigDecimal defaultValue) throws CacheException {
return getBigDecimal(JsonPointer.compile(path), defaultValue);
}
@Override
public BigInteger getBigInteger(JsonPointer ptr) {
return root == null ? null : root.at(ptr).bigIntegerValue();
}
@Override
public BigInteger getBigInteger(JsonPointer ptr, BigInteger defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
BigInteger result;
if (exists(ptr)) {
result = getBigInteger(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public BigInteger getBigInteger(String path) {
return getBigInteger(JsonPointer.compile(path));
}
@Override
public BigInteger getBigInteger(String path, BigInteger defaultValue) throws CacheException {
return getBigInteger(JsonPointer.compile(path), defaultValue);
}
@Override
public byte[] getBinary(JsonPointer ptr) throws CacheException {
try {
return root == null ? null : root.at(ptr).binaryValue();
} catch (IOException e) {
throw new CacheException(e);
}
}
@Override
public byte[] getBinary(JsonPointer ptr, byte[] defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
byte[] result;
if (exists(ptr)) {
result = getBinary(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public byte[] getBinary(String path) throws CacheException {
return getBinary(JsonPointer.compile(path));
}
@Override
public byte[] getBinary(String path, byte[] defaultValue) throws CacheException {
return getBinary(JsonPointer.compile(path), defaultValue);
}
@Override
public boolean getBoolean(JsonPointer ptr) {
return root != null && root.at(ptr).booleanValue();
}
@Override
public boolean getBoolean(JsonPointer ptr, boolean defaultValue) throws CacheException {
boolean result;
if (exists(ptr)) {
result = getBoolean(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public boolean getBoolean(String path) {
return getBoolean(JsonPointer.compile(path));
}
@Override
public boolean getBoolean(String path, boolean defaultValue) throws CacheException {
return getBoolean(JsonPointer.compile(path), defaultValue);
}
@Override
public double getDouble(JsonPointer ptr) {
return root == null ? 0.0D : root.at(ptr).doubleValue();
}
@Override
public double getDouble(JsonPointer ptr, double defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
double result;
if (exists(ptr)) {
result = getDouble(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public double getDouble(String path) {
return getDouble(JsonPointer.compile(path));
}
@Override
public double getDouble(String path, double defaultValue) throws CacheException {
return getDouble(JsonPointer.compile(path), defaultValue);
}
@Override
public float getFloat(JsonPointer ptr) {
return root == null ? 0.0F : root.at(ptr).floatValue();
}
@Override
public float getFloat(JsonPointer ptr, float defaultValue) throws CacheException {
float result;
if (exists(ptr)) {
result = getFloat(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public float getFloat(String path) {
return getFloat(JsonPointer.compile(path));
}
@Override
public float getFloat(String path, float defaultValue) throws CacheException {
return getFloat(JsonPointer.compile(path), defaultValue);
}
@Override
public int getInt(JsonPointer ptr) {
return root == null ? 0 : root.at(ptr).intValue();
}
@Override
public int getInt(JsonPointer ptr, int defaultValue) throws CacheException {
int result;
if (exists(ptr)) {
result = getInt(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public int getInt(String path) {
return getInt(JsonPointer.compile(path));
}
@Override
public int getInt(String path, int defaultValue) throws CacheException {
return getInt(JsonPointer.compile(path), defaultValue);
}
@Override
public long getLong(JsonPointer ptr) {
return root == null ? 0L : root.at(ptr).longValue();
}
@Override
public long getLong(JsonPointer ptr, long defaultValue) throws CacheException {
long result;
if (exists(ptr)) {
result = getLong(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public long getLong(String path) {
return getLong(JsonPointer.compile(path));
}
@Override
public long getLong(String path, long defaultValue) throws CacheException {
return getLong(JsonPointer.compile(path), defaultValue);
}
@Override
public ObjectMapper getMapper() {
return mapper;
}
@Override
public MergePolicy getMergePolicy() {
return mergePolicy;
}
@Override
public JsonNodeType getNodeType(JsonPointer ptr) {
return root.at(ptr).getNodeType();
}
@Override
public JsonNodeType getNodeType(String path) {
return getNodeType(JsonPointer.compile(path));
}
@Override
public int hashCode() {
// TODO Auto-generated method stub
return super.hashCode();
}
@Override
public boolean equals(Object obj) {
// TODO Auto-generated method stub
return super.equals(obj);
}
@Override
protected Object clone() throws CloneNotSupportedException {
// TODO Auto-generated method stub
return super.clone();
}
@Override
protected void finalize() throws Throwable {
// TODO Auto-generated method stub
super.finalize();
}
@Override
public Number getNumber(JsonPointer ptr) {
return root == null ? null : root.at(ptr).numberValue();
}
@Override
public Number getNumber(JsonPointer ptr, Number defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
Number result;
if (exists(ptr)) {
result = getNumber(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public Number getNumber(String path) {
return getNumber(JsonPointer.compile(path));
}
@Override
public Number getNumber(String path, Number defaultValue) throws CacheException {
return getNumber(JsonPointer.compile(path), defaultValue);
}
@Override
public T getObject(JsonPointer ptr, Class type) throws CacheException {
T result;
if (root == null) {
result = null;
} else {
JsonNode node = root.at(ptr);
Object value = node.isPojo() && !JsonNode.class.isAssignableFrom(type) ? ((POJONode) node).getPojo() : node;
if ((value != null) && (value.getClass() == type)) {
result = (T) value;
} else {
result = mapper.convertValue(value, type);
}
}
return result;
}
@Override
@SuppressWarnings("unchecked")
public T getObject(JsonPointer ptr, T defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
T result;
if (exists(ptr)) {
result = (T) getObject(ptr, defaultValue.getClass());
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public T getObject(String path, Class type) throws CacheException {
return getObject(JsonPointer.compile(path), type);
}
@Override
public T getObject(String path, T defaultValue) throws CacheException {
return getObject(JsonPointer.compile(path), defaultValue);
}
@Override
public List getObjects(JsonPointer ptr, Class type) throws CacheException {
List result;
if (root == null) {
result = null;
} else {
JsonNode node = root.at(ptr);
switch (node.getNodeType()) {
case ARRAY:
case OBJECT:
result = new ArrayList(node.size());
Iterator elements = node.elements();
while (elements.hasNext())
result.add(mapper.convertValue(elements.next(), type));
break;
default:
result = Collections.emptyList();
break;
}
}
return result;
}
@Override
public List getObjects(JsonPointer ptr, Class type, List defaultValue) throws CacheException {
Objects.requireNonNull(defaultValue, "defaultValue is required");
List result;
if (exists(ptr)) {
result = getObjects(ptr, type);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public List getObjects(String path, Class type) throws CacheException {
return getObjects(JsonPointer.compile(path), type);
}
@Override
public List getObjects(String path, Class type, List defaultValue) throws CacheException {
return getObjects(JsonPointer.compile(path), type, defaultValue);
}
@Override
public short getShort(JsonPointer ptr) {
return root == null ? (short) 0 : root.at(ptr).shortValue();
}
@Override
public short getShort(JsonPointer ptr, short defaultValue) {
short result;
if (exists(ptr)) {
result = getShort(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public short getShort(String path) {
return getShort(JsonPointer.compile(path));
}
@Override
public short getShort(String path, short defaultValue) {
return getShort(JsonPointer.compile(path), defaultValue);
}
@Override
public String getString(JsonPointer ptr) {
return root == null ? null : root.at(ptr).textValue();
}
@Override
public String getString(JsonPointer ptr, String defaultValue) {
Objects.requireNonNull(defaultValue, "defaultValue is required");
String result;
if (exists(ptr)) {
result = getString(ptr);
} else {
set(ptr, defaultValue);
result = defaultValue;
}
return result;
}
@Override
public String getString(String path) {
return getString(JsonPointer.compile(path));
}
@Override
public String getString(String path, String defaultValue) {
return getString(JsonPointer.compile(path), defaultValue);
}
protected void insertNumber(ArrayNode array, int index, Number value) {
if (value instanceof Short) {
array.insert(index, (Short) value);
} else if (value instanceof Integer) {
array.insert(index, (Integer) value);
} else if (value instanceof Long) {
array.insert(index, (Long) value);
} else if (value instanceof Float) {
array.insert(index, (Float) value);
} else if (value instanceof Double) {
array.insert(index, (Double) value);
} else if (value instanceof BigInteger) {
array.insert(index, (BigInteger) value);
} else if (value instanceof BigDecimal) {
array.insert(index, (BigDecimal) value);
} else {
throw new IllegalArgumentException(
"unsupported numeric value: " + value + " (" + value.getClass().getSimpleName() + ')');
}
}
@Override
public boolean isDirty() {
return isDirty;
}
protected boolean isInteger(String s) {
return INTEGER.matcher(s).matches();
}
@Override
public Root load(File file) throws CacheException {
Objects.requireNonNull(file, "file is required");
if (file.exists()) {
try (InputStream in = new FileInputStream(file)) {
load(in);
} catch (IOException e) {
throw new CacheException(e);
}
}
return this;
}
@Override
public Root load(InputStream in) throws CacheException {
Objects.requireNonNull(in, "in is required");
try (InputStream is = in) {
if (isLoaded) {
if (mergePolicy != MergePolicy.NO_MERGE) {
ContainerNode tree = (ContainerNode) mapper.readTree(in);
// The cache is already loaded, so merge the incoming object tree into the existing root.
merge(root, tree);
}
} else {
root = (ContainerNode) mapper.readTree(in);
isDirty = false;
isLoaded = true;
}
} catch (IOException e) {
throw new CacheException(e);
}
return this;
}
@Override
public Root mapper(ObjectMapper mapper) {
Objects.requireNonNull(mapper, "mapper is required");
this.mapper = mapper;
return this;
}
protected void merge(ContainerNode dest, ContainerNode src) {
if (dest.getNodeType() == src.getNodeType()) {
if (dest.isArray()) {
ArrayNode destArray = (ArrayNode) dest;
ArrayNode srcArray = (ArrayNode) src;
outer:
for (int i = 0; i < srcArray.size(); i++) {
// Only add a source element if it is not already present in the destination array.
JsonNode srcElem = srcArray.get(i);
for (int j = 0; j < destArray.size(); j++) {
if (destArray.get(j).equals(srcElem))
continue outer;
}
destArray.add(srcElem);
}
} else if (dest.isObject()) {
ObjectNode destObject = (ObjectNode) dest;
ObjectNode srcObject = (ObjectNode) src;
Iterator> fields = srcObject.fields();
while (fields.hasNext()) {
Entry field = fields.next();
String fieldName = field.getKey();
JsonNode srcChild = field.getValue();
if (destObject.has(fieldName)) {
JsonNode destChild = destObject.get(fieldName);
switch (mergePolicy) {
case OVERWRITE_EXISTING:
destObject.set(fieldName, srcChild);
// Mark the cache as dirty as we've added items from another file.
isDirty = true;
LOGGER.info("Existing root property '" + fieldName
+ "' has been overwritten by incoming data");
break;
case MERGE_RECURSIVE:
if (destChild.isContainerNode() && srcChild.isContainerNode())
merge((ContainerNode) destChild, (ContainerNode) srcChild);
break;
case KEEP_EXISTING:
LOGGER.info("Existing root property '" + fieldName
+ "' will not be overwritten by incoming data");
default:
// Nothing to do.
break;
}
} else {
destObject.set(fieldName, srcChild);
LOGGER.info("New property '" + fieldName + "' has been added from incoming data");
// Mark the cache as dirty as we've added items from another file.
isDirty = true;
}
}
}
} else {
LOGGER.warn("Cannot merge containers of differing types");
}
}
@Override
public Root mergePolicy(MergePolicy policy) {
Objects.requireNonNull(policy, "policy is required");
this.mergePolicy = policy;
return this;
}
// @Override
@SuppressWarnings("unchecked")
protected JsonNode nodeFor(Object value) {
JsonNode node;
if (value == null) {
node = root.nullNode();
} else if (value instanceof JsonNode) {
node = (JsonNode) value;
} else if (value instanceof Boolean) {
node = root.booleanNode((Boolean) value);
} else if (value instanceof List) {
node = root.arrayNode();
for (Object element : (List) value)
((ArrayNode) node).add(nodeFor(element));
} else if (value instanceof Map) {
node = root.objectNode();
for (Entry entry : ((Map) value).entrySet())
((ObjectNode) node).set(entry.getKey(), nodeFor(entry.getValue()));
} else if (value instanceof Number) {
if (value instanceof Byte)
node = root.numberNode((Byte) value);
else if (value instanceof Short)
node = root.numberNode((Short) value);
else if (value instanceof Integer)
node = root.numberNode((Integer) value);
else if (value instanceof Long)
node = root.numberNode((Long) value);
else if (value instanceof Float)
node = root.numberNode((Float) value);
else if (value instanceof Double)
node = root.numberNode((Double) value);
else if (value instanceof BigInteger)
node = root.numberNode((BigInteger) value);
else if (value instanceof BigDecimal)
node = root.numberNode((BigDecimal) value);
else
throw new IllegalArgumentException("unsupported number type: " + value.getClass().getSimpleName());
} else if (value instanceof String) {
node = root.textNode((String) value);
} else if (value instanceof byte[]) {
node = root.binaryNode((byte[]) value);
} else {
node = root.pojoNode(value);
}
return node;
}
protected JsonNodeType nodeTypeFor(Object value) {
JsonNodeType type;
if (value == null) {
type = JsonNodeType.NULL;
} else if (value instanceof Boolean) {
type = JsonNodeType.BOOLEAN;
} else if (value instanceof Number) {
type = JsonNodeType.NUMBER;
} else if (value instanceof String) {
type = JsonNodeType.STRING;
} else if (value instanceof ArrayNode || value instanceof List) {
type = JsonNodeType.ARRAY;
} else if (value instanceof byte[]) {
type = JsonNodeType.BINARY;
} else if (value instanceof ObjectNode || value instanceof Map) {
type = JsonNodeType.OBJECT;
} else {
type = JsonNodeType.POJO;
}
return type;
}
@Override
public JsonCache parent() {
return null;
}
protected void putNumber(ObjectNode object, String property, Number value) {
if (value instanceof Short) {
object.put(property, (Short) value);
} else if (value instanceof Integer) {
object.put(property, (Integer) value);
} else if (value instanceof Long) {
object.put(property, (Long) value);
} else if (value instanceof Float) {
object.put(property, (Float) value);
} else if (value instanceof Double) {
object.put(property, (Double) value);
} else if (value instanceof BigInteger) {
object.put(property, (BigInteger) value);
} else if (value instanceof BigDecimal) {
object.put(property, (BigDecimal) value);
} else {
throw new IllegalArgumentException(
"unsupported numeric value: " + value + " (" + value.getClass().getSimpleName() + ')');
}
}
@Override
public Root root() {
return this;
}
@Override
public Root save(File file) throws CacheException {
Objects.requireNonNull(file, "file is required");
file.getParentFile().mkdirs();
try {
save(new FileOutputStream(file));
} catch (FileNotFoundException e) {
throw new CacheException(e);
}
return this;
}
@Override
public Root save(OutputStream out) throws CacheException {
if (root == null || root.isMissingNode())
throw new CacheException("null or missing root node");
Objects.requireNonNull(out, "out is required");
try (OutputStream o = out) {
mapper.writeValue(o, root);
} catch (IOException e) {
throw new CacheException(e);
}
isDirty = false;
return this;
}
@Override
public JsonCache set(JsonPointer ptr, BigDecimal value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, BigInteger value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, boolean value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, double value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, float value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, int value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, List values) throws CacheException {
// Note: if the node identified by ptr is not an array, we must create one before populating it.
ArrayNode array;
ContainerNode container = ensureContainerExists(ptr);
JsonNode target = container.at(ptr.last());
if (target.isArray()) {
array = (ArrayNode) target;
} else {
String property = ptr.last().getMatchingProperty();
array = container.arrayNode();
switch (container.getNodeType()) {
case ARRAY:
int index = Integer.parseInt(property);
((ArrayNode) container).set(index, array);
break;
case OBJECT:
((ObjectNode) container).set(property, array);
break;
default:
throw new CacheException(ptr + " does not identify an array");
}
}
// Now that the target array exists, we can populate it.
array.removeAll();
for (Object value : values) {
JsonNode node = nodeFor(value);
array.add(node);
}
setDirty();
return this;
}
@Override
public JsonCache set(JsonPointer ptr, long value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, Object value) {
String property = ptr.last().getMatchingProperty();
ContainerNode container = ensureContainerExists(ptr);
JsonNode node = nodeFor(value);
switch (container.getNodeType()) {
case ARRAY:
ArrayNode array = (ArrayNode) container;
int index = Integer.parseInt(property);
if (index < array.size()) {
array.set(index, node);
} else {
// Fill any gap between current size and index with nulls (Jackson doesn't support sparse arrays).
for (int i = array.size(); i < index; i++)
array.add(array.nullNode());
array.add(node);
}
break;
case OBJECT:
((ObjectNode) container).set(property, node);
break;
default:
throw new IllegalArgumentException(ptr + " does not identify a settable container");
}
setDirty();
return this;
}
@Override
public JsonCache set(JsonPointer ptr, short value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(JsonPointer ptr, String value) {
return set(ptr, (Object) value);
}
@Override
public JsonCache set(String path, BigDecimal value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, BigInteger value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, boolean value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, double value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, float value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, int value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, List values) throws CacheException {
return set(JsonPointer.compile(path), values);
}
@Override
public JsonCache set(String path, long value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, Object value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, short value) {
return set(JsonPointer.compile(path), value);
}
@Override
public JsonCache set(String path, String value) {
return set(JsonPointer.compile(path), value);
}
protected void setDirty() {
isDirty = true;
isLoaded = true;
}
@Override
public int size(JsonPointer ptr) {
return root == null ? 0 : root.at(ptr).size();
}
@Override
public int size(String path) {
return size(JsonPointer.compile(path));
}
@Override
public String toString() {
return "JsonCacheImpl [root=" + root + ']';
}
@Override
public Root unload() {
isLoaded = false;
isDirty = false;
root = null;
return this;
}
}
