001/* 002 * Copyright (c) 2006-2011 Nuxeo SA (http://nuxeo.com/) and others. 003 * 004 * All rights reserved. This program and the accompanying materials 005 * are made available under the terms of the Eclipse Public License v1.0 006 * which accompanies this distribution, and is available at 007 * http://www.eclipse.org/legal/epl-v10.html 008 * 009 * Contributors: 010 * Anahide Tchertchian 011 */ 012package org.nuxeo.ecm.core.api.externalblob; 013 014import java.util.Collections; 015import java.util.Map; 016 017import org.nuxeo.ecm.core.api.PropertyException; 018 019/** 020 * Abstract class for external blob adapters. 021 * <p> 022 * Provides generic methods 023 * <p> 024 * Extend this class if you want your contributions to be robust to interface changes. 025 * 026 * @author Anahide Tchertchian 027 */ 028public abstract class AbstractExternalBlobAdapter implements ExternalBlobAdapter { 029 030 protected String prefix; 031 032 protected Map<String, String> properties; 033 034 @Override 035 public String getPrefix() { 036 return prefix; 037 } 038 039 @Override 040 public void setPrefix(String prefix) { 041 this.prefix = prefix; 042 } 043 044 @Override 045 public Map<String, String> getProperties() { 046 // de-reference 047 if (properties == null) { 048 return Collections.emptyMap(); 049 } 050 return Collections.unmodifiableMap(properties); 051 } 052 053 @Override 054 public String getProperty(String name) { 055 Map<String, String> props = getProperties(); 056 String prop = props.get(name); 057 prop = prop.trim(); 058 return prop; 059 } 060 061 @Override 062 public void setProperties(Map<String, String> properties) { 063 this.properties = properties; 064 } 065 066 public String getLocalName(String uri) throws PropertyException { 067 String prefix = getPrefix(); 068 if (prefix == null) { 069 throw new PropertyException(String.format("Null prefix on external blob adapter with class '%s'", 070 getClass().getName())); 071 } 072 if (uri == null || !uri.startsWith(prefix + ExternalBlobAdapter.PREFIX_SEPARATOR)) { 073 throw new PropertyException(String.format( 074 "Invalid uri '%s' for this adapter: expected to start with prefix '%s'", uri, prefix)); 075 } 076 return uri.substring(prefix.length() + 1); 077 } 078}