com.google.gerrit.client.rpc.NativeMap.java Source code

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Here is the source code for com.google.gerrit.client.rpc.NativeMap.java

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// Copyright (C) 2012 The Android Open Source Project
//
// 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.gerrit.client.rpc;

import com.google.gwt.core.client.JavaScriptObject;
import com.google.gwt.core.client.JsArray;
import com.google.gwt.user.client.rpc.AsyncCallback;

import java.util.Set;

/** A map of native JSON objects, keyed by a string. */
public class NativeMap<T extends JavaScriptObject> extends JavaScriptObject {
    /**
     * Loop through the result map's entries and copy the key strings into the
     * "name" property of the corresponding child object. This only runs on the
     * top level map of the result, and requires the children to be JSON objects
     * and not a JSON primitive (e.g. boolean or string).
     */
    public static <T extends JavaScriptObject, M extends NativeMap<T>> AsyncCallback<M> copyKeysIntoChildren(
            AsyncCallback<M> callback) {
        return copyKeysIntoChildren("name", callback);
    }

    /** Loop through the result map and set asProperty on the children. */
    public static <T extends JavaScriptObject, M extends NativeMap<T>> AsyncCallback<M> copyKeysIntoChildren(
            final String asProperty, AsyncCallback<M> callback) {
        return new TransformCallback<M, M>(callback) {
            @Override
            protected M transform(M result) {
                result.copyKeysIntoChildren(asProperty);
                return result;
            }
        };
    }

    protected NativeMap() {
    }

    public final Set<String> keySet() {
        return Natives.keys(this);
    }

    public final native JsArray<T> values()
    /*-{
      var s = this;
      var v = [];
      var i = 0;
      for (var k in s) {
        if (s.hasOwnProperty(k)) {
    v[i++] = s[k];
        }
      }
      return v;
    }-*/;

    public final int size() {
        return keySet().size();
    }

    public final boolean isEmpty() {
        return size() == 0;
    }

    public final boolean containsKey(String n) {
        return get(n) != null;
    }

    public final native T get(String n) /*-{ return this[n]; }-*/;

    public final native void copyKeysIntoChildren(String p)
    /*-{
      var s = this;
      for (var k in s) {
        if (s.hasOwnProperty(k)) {
    var c = s[k];
    c[p] = k;
        }
      }
    }-*/;
}