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ObjectLazyAny.java
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303 lines (273 loc) · 8.59 KB
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package com.jsoniter.any;
import com.jsoniter.*;
import com.jsoniter.output.JsonStream;
import com.jsoniter.spi.JsonException;
import com.jsoniter.spi.TypeLiteral;
import java.io.IOException;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Set;
class ObjectLazyAny extends LazyAny {
private final static TypeLiteral<Map<String, Any>> typeLiteral = new TypeLiteral<Map<String, Any>>(){};
private Map<String, Any> cache;
private int lastParsedPos;
public ObjectLazyAny(byte[] data, int head, int tail) {
super(data, head, tail);
lastParsedPos = head;
}
@Override
public ValueType valueType() {
return ValueType.OBJECT;
}
@Override
public Object object() {
fillCache();
return cache;
}
@Override
public boolean toBoolean() {
try {
JsonIterator iter = parse();
try {
return CodegenAccess.readObjectStart(iter);
} finally {
JsonIteratorPool.returnJsonIterator(iter);
}
} catch (IOException e) {
throw new JsonException(e);
}
}
@Override
public int toInt() {
return size();
}
@Override
public long toLong() {
return size();
}
@Override
public float toFloat() {
return size();
}
@Override
public double toDouble() {
return size();
}
@Override
public BigInteger toBigInteger() {
return BigInteger.valueOf(size());
}
@Override
public BigDecimal toBigDecimal() {
return BigDecimal.valueOf(size());
}
@Override
public int size() {
fillCache();
return cache.size();
}
@Override
public Set<String> keys() {
fillCache();
return (Set) cache.keySet();
}
@Override
public Any get(Object key) {
Any element = fillCacheUntil(key);
if (element == null) {
return new NotFoundAny(key, object());
}
return element;
}
@Override
public Any get(Object[] keys, int idx) {
if (idx == keys.length) {
return this;
}
Object key = keys[idx];
if (isWildcard(key)) {
fillCache();
HashMap<String, Any> result = new HashMap<String, Any>();
for (Map.Entry<String, Any> entry : cache.entrySet()) {
Any mapped = entry.getValue().get(keys, idx + 1);
if (mapped.valueType() != ValueType.INVALID) {
result.put(entry.getKey(), mapped);
}
}
return Any.rewrap(result);
}
Any child = fillCacheUntil(key);
if (child == null) {
return new NotFoundAny(keys, idx, object());
}
return child.get(keys, idx+1);
}
private Any fillCacheUntil(Object target) {
if (lastParsedPos == tail) {
return cache.get(target);
}
if (cache == null) {
cache = new HashMap<String, Any>(4);
}
Any value = cache.get(target);
if (value != null) {
return value;
}
JsonIterator iter = JsonIteratorPool.borrowJsonIterator();
try {
iter.reset(data, lastParsedPos, tail);
if (lastParsedPos == head) {
if (!CodegenAccess.readObjectStart(iter)) {
lastParsedPos = tail;
return null;
}
String field = CodegenAccess.readObjectFieldAsString(iter);
value = iter.readAny();
cache.put(field, value);
if (field.hashCode() == target.hashCode() && field.equals(target)) {
lastParsedPos = CodegenAccess.head(iter);
return value;
}
}
while (CodegenAccess.nextToken(iter) == ',') {
String field = CodegenAccess.readObjectFieldAsString(iter);
value = iter.readAny();
cache.put(field, value);
if (field.hashCode() == target.hashCode() && field.equals(target)) {
lastParsedPos = CodegenAccess.head(iter);
return value;
}
}
lastParsedPos = tail;
return null;
} catch (IOException e) {
throw new JsonException(e);
} finally {
JsonIteratorPool.returnJsonIterator(iter);
}
}
private void fillCache() {
if (lastParsedPos == tail) {
return;
}
if (cache == null) {
cache = new HashMap<String, Any>(4);
}
JsonIterator iter = JsonIteratorPool.borrowJsonIterator();
try {
iter.reset(data, lastParsedPos, tail);
if (lastParsedPos == head) {
if (!CodegenAccess.readObjectStart(iter)) {
lastParsedPos = tail;
return;
}
String field = CodegenAccess.readObjectFieldAsString(iter);
cache.put(field, iter.readAny());
}
while (CodegenAccess.nextToken(iter) == ',') {
String field = CodegenAccess.readObjectFieldAsString(iter);
cache.put(field, iter.readAny());
}
lastParsedPos = tail;
} catch (IOException e) {
throw new JsonException(e);
} finally {
JsonIteratorPool.returnJsonIterator(iter);
}
}
@Override
public EntryIterator entries() {
return new LazyIterator();
}
private class LazyIterator implements EntryIterator {
private Iterator<Map.Entry<String, Any>> mapIter;
private String key;
private Any value;
public LazyIterator() {
if (cache == null) {
cache = new HashMap<String, Any>();
}
mapIter = new HashMap<String, Any>(cache).entrySet().iterator();
try {
if (lastParsedPos == head) {
JsonIterator iter = JsonIteratorPool.borrowJsonIterator();
try {
iter.reset(data, lastParsedPos, tail);
if (!CodegenAccess.readObjectStart(iter)) {
lastParsedPos = tail;
} else {
lastParsedPos = CodegenAccess.head(iter);
}
} finally {
JsonIteratorPool.returnJsonIterator(iter);
}
}
} catch (IOException e) {
throw new JsonException(e);
}
}
@Override
public boolean next() {
if (lastParsedPos == tail) {
return false;
}
if (mapIter != null) {
if (mapIter.hasNext()) {
Map.Entry<String, Any> entry = mapIter.next();
key = entry.getKey();
value = entry.getValue();
return true;
} else {
mapIter = null;
}
}
JsonIterator iter = JsonIteratorPool.borrowJsonIterator();
try {
iter.reset(data, lastParsedPos, tail);
key = CodegenAccess.readObjectFieldAsString(iter);
value = iter.readAny();
cache.put(key, value);
if (CodegenAccess.nextToken(iter) == ',') {
lastParsedPos = CodegenAccess.head(iter);
} else {
lastParsedPos = tail;
}
} catch (IOException e) {
throw new JsonException(e);
} finally {
JsonIteratorPool.returnJsonIterator(iter);
}
return true;
}
@Override
public String key() {
return key;
}
@Override
public Any value() {
return value;
}
}
@Override
public void writeTo(JsonStream stream) throws IOException {
if (lastParsedPos == head) {
super.writeTo(stream);
} else {
// there might be modification
fillCache();
stream.writeVal(typeLiteral, (Map) cache);
}
}
@Override
public String toString() {
if (lastParsedPos == head) {
return super.toString();
} else {
fillCache();
return JsonStream.serialize(cache);
}
}
}