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/*
 * Copyright 2011 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.safecss.shared;

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

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

* All implementors must implement .equals and .hashCode so that they operate * just like String.equals() and String.hashCode(). */ class SafeStylesString implements SafeStyles { private String css; /** * Constructs a {@link SafeStylesString} 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 SafeStyles} interface. * * @param css the string to be wrapped as a {@link SafeStyles} */ SafeStylesString(String css) { SafeStylesUtils.verifySafeStylesConstraints(css); this.css = css; } /** * No-arg constructor for compatibility with GWT serialization. */ @SuppressWarnings("unused") private SafeStylesString() { } /** * {@inheritDoc} */ public String asString() { return css; } /** * Compares this string to the specified object. */ @Override public boolean equals(Object obj) { if (!(obj instanceof SafeStyles)) { return false; } return css.equals(((SafeStyles) obj).asString()); } /** * Returns a hash code for this string. */ @Override public int hashCode() { return css.hashCode(); } }





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