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/*
* Copyright 2011, The gwtquery team.
*
* 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.google.gwt.query.client.js;
import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArrayMixed;
import com.google.gwt.core.client.JsArrayString;
/**
* A Lightweight JSO class to store data.
*/
public class JsCache extends JavaScriptObject {
protected JsCache() {
}
public static JsCache create() {
return createObject().cast();
}
public final native void concat(Object ary) /*-{
if (ary) this.concat(ary);
}-*/;
public final void copy(JsCache jso) {
for (String k : jso.keys()) {
put(k, jso.get(k));
}
}
public final void pushAll(JavaScriptObject prevElem) {
checkNull();
JsCache c = prevElem.cast();
for (int i = 0, ilen = c.length(); i < ilen; i++) {
put(length(), c.get(i));
}
}
public final native void delete(Object name) /*-{
delete this[name];
}-*/;
public final void clear() {
for (String k : keys()) {
delete(k);
}
}
public final native boolean exists(Object name) /*-{
return !!this[name];
}-*/;
@SuppressWarnings("unchecked")
public final T get(Object id, Class clz) {
Object o = get(id);
if (o != null && clz != null) {
if (o instanceof Double) {
Double d = (Double) o;
if (clz == Float.class)
o = d.floatValue();
else if (clz == Integer.class)
o = d.intValue();
else if (clz == Long.class)
o = d.longValue();
else if (clz == Short.class)
o = d.shortValue();
else if (clz == Byte.class)
o = d.byteValue();
} else if (clz == Boolean.class && !(o instanceof Boolean)) {
o = Boolean.valueOf(String.valueOf(o));
} else if (clz == String.class && !(o instanceof String)) {
o = String.valueOf(o);
}
}
return (T) o;
}
public final native T get(Object id) /*-{
return @com.google.gwt.query.client.js.JsCache::gwtBox(*)([ this && this[id] ]);
}-*/;
public final JsCache getCache(int id) {
return (JsCache) get(id);
}
public final boolean getBoolean(Object id) {
Boolean r = get(id, Boolean.class);
return r == null ? false : r;
}
public final float getFloat(Object id) {
Float r = get(id, Float.class);
return r == null ? 0 : r;
}
public final double getDouble(Object id) {
Double r = get(id, Double.class);
return r == null ? 0 : r;
}
public final int getInt(Object id) {
Integer r = get(id, Integer.class);
return r == null ? 0 : r;
}
public final native String getString(Object id) /*-{
return this[id] == null ? null : String(this[id]);
}-*/;
public final native JsArrayMixed getArray(Object id) /*-{
var r = this[id];
if (Object.prototype.toString.call(r) == '[object Array]') {
return r;
}
return null;
}-*/;
public final T getJavaScriptObject(Object name) {
Object o = get(name);
return (o != null && o instanceof JavaScriptObject) ? ((JavaScriptObject) o). cast() : null;
}
public final native boolean isEmpty() /*-{
for (k in this) {
if (this.hasOwnProperty(k))
return false;
}
return true;
}-*/;
public final native boolean contains(Object o) /*-{
return this.indexOf(o) >= 0;
}-*/;
public final native void remove(Object o) /*-{
var i = this.indexOf(o);
if (i >= 0) this.splice(i, 1);
}-*/;
public final native int indexOf(Object o) /*-{
// HtmlUnit fails when this returns 0
return this.indexOf(o);
}-*/;
public final native JsCache putBoolean(Object id, boolean b) /*-{
this[id] = b;
return this;
}-*/;
public final native JsCache putNumber(Object id, double n) /*-{
this[id] = n;
return this;
}-*/;
public final JsCache put(Object id, Object obj) {
if (obj instanceof Boolean) {
putBoolean(id, (Boolean) obj);
} else if (obj instanceof Number) {
putNumber(id, ((Number) obj).doubleValue());
} else {
putObject(id, obj);
}
return this;
}
public final native JsCache putObject(Object id, Object obj) /*-{
this[id] = obj;
return this;
}-*/;
public final native int length() /*-{
if (typeof(this.length) == 'number')
return this.length;
var key, ret = 0;
// Chrome in DevMode injects a property to JS objects
for (key in this) {
if (key != "__gwt_ObjectId")
ret ++;
}
return ret;
}-*/;
public final int[] indexes() {
checkNull();
JsArrayString a = keysImpl();
int[] ret = new int[a.length()];
for (int i = 0; i < a.length(); i++) {
try {
ret[i] = Integer.valueOf(a.get(i));
} catch (Exception e) {
ret[i] = i;
}
}
return ret;
}
public final String[] keys() {
checkNull();
JsArrayString a = keysImpl();
String[] ret = new String[a.length()];
for (int i = 0; i < a.length(); i++) {
ret[i] = a.get(i);
}
return ret;
}
public final Object[] elements() {
String[] keys = keys();
Object[] ret = new Object[keys.length];
int i = 0;
for (String s : keys) {
ret[i++] = get(s);
}
return ret;
}
public final String tostring() {
String ret = getClass().getName() + "{ ";
for (String k : keys()) {
ret += k + "=" + get(k) + " ";
}
return ret + "}";
}
// In dev-mode a null object casted to JavascriptObject does not throw a NPE
public final void checkNull() {
checkNull(this);
}
private native JsArrayString keysImpl() /*-{
var key, keys=[];
// Chrome in DevMode sets '__gwt_ObjectId' to JS objects
// GWT sets '$H' when calling getHashCode (see com/google/gwt/core/client/impl/Impl.java)
for(key in this) {
if (this.hasOwnProperty(key) && key != '__gwt_ObjectId' && key != '$H')
keys.push(String(key));
}
return keys;
}-*/;
/**
* Throw a NPE when a js is null.
*/
public static final T checkNull(T js) {
if (!GWT.isProdMode() && js == null) {
throw new NullPointerException();
}
return js;
}
/**
* Gets an object wrapped in a js array and boxes it with the appropriate
* object in the GWT world.
*
* It is thought to be called from other jsni code without dealing with casting issues.
*
* It will box the unique element in the array with a Boolean or a Double in the case
* of primitive variables, otherwise it returns the object itself, or null if undefined.
*
* Example
*
* native Object myMethod() /*-{
* var myJsVar = ... ;
* return @com.google.gwt.query.client.js.JsCache::gwtBox(*)([ myJsVar ]);
* }-* /
*
*
*/
public static native Object gwtBox(JavaScriptObject oneElementArray) /*-{
var r = oneElementArray;
if (typeof r == 'object' && r.length == 1) {
var r = r[0], t = typeof r;
if (t == 'boolean') return @java.lang.Boolean::valueOf(Z)(r);
if (t == 'number') return @java.lang.Double::valueOf(D)(r);
}
return r || null;
}-*/;
}