Java tutorial
/* * Copyright (C) 2015 Contentful GmbH * * 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.contentful.vault; import org.apache.commons.lang3.StringUtils; public abstract class Resource { String remoteId; String createdAt; String updatedAt; String contentType; public String remoteId() { return remoteId; } public String createdAt() { return createdAt; } public String updatedAt() { return updatedAt; } void setRemoteId(String remoteId) { this.remoteId = remoteId; } void setCreatedAt(String createdAt) { this.createdAt = createdAt; } void setUpdatedAt(String updatedAt) { this.updatedAt = updatedAt; } void setContentType(String contentType) { this.contentType = contentType; } String contentType() { return contentType; } String getIdPrefix() { return null; } @Override public boolean equals(Object o) { if (this == o) return true; if (!(o instanceof Resource)) return false; Resource resource = (Resource) o; String prefix = StringUtils.defaultString(getIdPrefix(), ""); if (!prefix.equals(StringUtils.defaultString(resource.getIdPrefix(), ""))) return false; return (prefix + remoteId()).equals(prefix + resource.remoteId()); } @Override public int hashCode() { return (StringUtils.defaultString(getIdPrefix(), "") + remoteId).hashCode(); } }