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/*
 * Copyright 2010 Google Inc.
 *
 * 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.safehtml.shared;

/**
 * A string wrapped as an object of type {@link SafeHtml}.
 *
 * 

* This class is package-private and intended for internal use by the * {@link com.google.gwt.safehtml} package. * *

* All implementors must implement .equals and .hashCode so that they operate * just like String.equals() and String.hashCode(). */ class SafeHtmlString implements SafeHtml { private String html; /** * Constructs a {@link SafeHtmlString} from a string. Callers are responsible * for ensuring that the string passed as the argument to this constructor * satisfies the constraints of the contract imposed by the {@link SafeHtml} * interface. * * @param html the string to be wrapped as a {@link SafeHtml} */ SafeHtmlString(String html) { if (html == null) { throw new NullPointerException("html is null"); } this.html = html; } /** * No-arg constructor for compatibility with GWT serialization. */ @SuppressWarnings("unused") private SafeHtmlString() { } /** * {@inheritDoc} */ public String asString() { return html; } /** * Compares this string to the specified object. */ @Override public boolean equals(Object obj) { if (!(obj instanceof SafeHtml)) { return false; } return html.equals(((SafeHtml) obj).asString()); } /** * Returns a hash code for this string. */ @Override public int hashCode() { return html.hashCode(); } }





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