Java tutorial
/* * Copyright (c) 2008-2018 Haulmont. * * 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.haulmont.cuba.web.gui.icons; import com.haulmont.bali.util.Preconditions; import com.vaadin.server.ClassResource; import com.vaadin.server.Resource; import org.springframework.core.annotation.Order; import org.springframework.stereotype.Component; import static com.haulmont.cuba.web.gui.icons.IconProvider.LOWEST_PLATFORM_PRECEDENCE; @Component @Order(LOWEST_PLATFORM_PRECEDENCE - 50) public class ClassPathIconProvider implements IconProvider { protected static final String CLASSPATH_PREFIX = "classpath:"; @Override public Resource getIconResource(String iconPath) { Preconditions.checkNotEmptyString(iconPath, "Icon path should not be empty"); String icon = iconPath.substring(CLASSPATH_PREFIX.length()); return new ClassResource(icon); } @Override public boolean canProvide(String iconPath) { return iconPath != null && !iconPath.isEmpty() && iconPath.startsWith(CLASSPATH_PREFIX); } }