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ObjectLazyAny.java
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163 lines (148 loc) · 4.37 KB
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package com.jsoniter.any;
import com.jsoniter.*;
import java.io.IOException;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
class ObjectLazyAny extends LazyAny {
private Map<Object, 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 {
return CodegenAccess.readObjectStart(parse());
} catch (IOException e) {
throw new JsonException(e);
}
}
@Override
public int size() {
fillCache();
return cache.size();
}
@Override
public Set<String> keys() {
fillCache();
return (Set) cache.keySet();
}
@Override
public Any get(Object key) {
try {
return fillCache(key);
} catch (IndexOutOfBoundsException e) {
return null;
} catch (ClassCastException e) {
return null;
} catch (IOException e) {
throw new JsonException(e);
}
}
@Override
public Any get(Object[] keys, int idx) {
if (idx == keys.length) {
return this;
}
try {
Any child = fillCache(keys[idx]);
if (child == null) {
return null;
}
return child.get(keys, idx+1);
} catch (IOException e) {
throw new JsonException(e);
}
}
@Override
public Any require(Object[] keys, int idx) {
if (idx == keys.length) {
return this;
}
try {
Any result = fillCache(keys[idx]);
if (result == null) {
throw reportPathNotFound(keys, idx);
}
return result.require(keys, idx + 1);
} catch (IOException e) {
throw new JsonException(e);
}
}
private Any fillCache(Object target) throws IOException {
if (lastParsedPos == tail) {
return cache.get(target);
}
if (cache != null) {
Any value = cache.get(target);
if (value != null) {
return value;
}
}
JsonIterator iter = tlsIter.get();
iter.reset(data, lastParsedPos, tail);
if (cache == null) {
cache = new HashMap<Object, Any>(4);
}
if (lastParsedPos == head) {
if (!CodegenAccess.readObjectStart(iter)) {
lastParsedPos = tail;
return null;
}
String field = CodegenAccess.readObjectFieldAsString(iter);
Any 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);
Any 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;
}
private void fillCache() {
if (lastParsedPos == tail) {
return;
}
try {
JsonIterator iter = tlsIter.get();
iter.reset(data, lastParsedPos, tail);
if (cache == null) {
cache = new HashMap<Object, Any>(4);
}
if (!CodegenAccess.readObjectStart(iter)) {
lastParsedPos = tail;
return;
}
String field = CodegenAccess.readObjectFieldAsString(iter);
cache.put(field, iter.readAny());
while (CodegenAccess.nextToken(iter) == ',') {
field = CodegenAccess.readObjectFieldAsString(iter);
cache.put(field, iter.readAny());
}
lastParsedPos = tail;
} catch (IOException e) {
throw new JsonException(e);
}
}
}