Java tutorial
/* ******************************************************************** Licensed to Jasig under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. Jasig licenses this file to you 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 org.bedework.calfacade; import org.bedework.calfacade.annotations.Dump; import org.bedework.calfacade.annotations.NoDump; import org.bedework.calfacade.base.BwDbentity; import org.bedework.calfacade.exc.CalFacadeException; import org.bedework.calfacade.util.CalFacadeUtil; import org.bedework.util.misc.ToString; import org.apache.commons.codec.binary.Base64; import org.apache.commons.codec.binary.Base64OutputStream; import org.hibernate.Hibernate; import java.io.ByteArrayOutputStream; import java.io.InputStream; import java.sql.Blob; /** Represent the content for a resource stored within the system, e.g an attachment or an * image. The actual content is stored in a BwResourceContent object to allow us * to put off retrieval of content - or maybe even store outside of the db. * * @author Mike Douglass douglm - rpi.edu */ @Dump(elementName = "resourceContent", keyFields = { "colPath", "name", "encodedContent" }) public class BwResourceContent extends BwDbentity<BwResourceContent> { /* The collection this belongs to */ private String colPath; private String name; private Blob value; /** Constructor * */ public BwResourceContent() { } /* ==================================================================== * Bean methods * ==================================================================== */ /** Set the object's collection path * * @param val String path */ public void setColPath(final String val) { colPath = val; } /** Get the object's collection path * * @return String path */ public String getColPath() { return colPath; } /** Set the name * * @param val String name */ public void setName(final String val) { name = val; } /** Get the name * * @return String name */ public String getName() { return name; } /** Set the value * * @param val byte[] */ public void setValue(final Blob val) { value = val; } /** Get the value * * @return Blob */ @NoDump public Blob getValue() { return value; } /* ==================================================================== * non-db methods * ==================================================================== */ /** * @param val * @throws CalFacadeException */ @NoDump public void setContent(final byte[] val) throws CalFacadeException { try { setValue(Hibernate.createBlob(val)); } catch (Throwable t) { throw new CalFacadeException(t); } } /** Used during dump and restore * @param val base64 encoded value * @throws CalFacadeException */ public void setEncodedContent(final String val) throws CalFacadeException { try { setContent(Base64.decodeBase64(val.getBytes())); } catch (Throwable t) { throw new CalFacadeException(t); } } /** * @return base64 encoded value * @throws CalFacadeException */ public String getEncodedContent() throws CalFacadeException { Base64OutputStream b64out = null; try { Blob b = getValue(); if (b == null) { return null; } int len = -1; int chunkSize = 1024; byte buffer[] = new byte[chunkSize]; ByteArrayOutputStream baos = new ByteArrayOutputStream(); b64out = new Base64OutputStream(baos); InputStream str = b.getBinaryStream(); while ((len = str.read(buffer)) != -1) { b64out.write(buffer, 0, len); } return new String(baos.toByteArray()); } catch (Throwable t) { throw new CalFacadeException(t); } finally { try { b64out.close(); } catch (Throwable t) { } } } /** * @return String value * @throws CalFacadeException */ @NoDump public String getStringContent() throws CalFacadeException { try { Blob b = getValue(); if (b == null) { return null; } int len = -1; int chunkSize = 1024; byte buffer[] = new byte[chunkSize]; ByteArrayOutputStream baos = new ByteArrayOutputStream(); InputStream str = b.getBinaryStream(); while ((len = str.read(buffer)) != -1) { baos.write(buffer, 0, len); } return new String(baos.toByteArray()); } catch (Throwable t) { throw new CalFacadeException(t); } } /** Copy this objects values into the parameter * * @param val */ public void copyTo(final BwResourceContent val) { val.setColPath(getColPath()); val.setName(getName()); val.setValue(getValue()); } /* ==================================================================== * Object methods * ==================================================================== */ @Override public int hashCode() { return getValue().hashCode(); } @Override public int compareTo(final BwResourceContent that) { if (this == that) { return 0; } return CalFacadeUtil.cmpObjval(getColPath(), that.getColPath()); /* int res = CalFacadeUtil.cmpObjval(getColPath(), that.getColPath()); if (res != 0) { return res; } byte[] thisone = getValue(); byte[] thatone = that.getValue(); if (thisone == null) { if (thatone == null) { return 0; } return -1; } if (thatone == null) { return 1; } if (thisone.length < thatone.length) { return -1; } if (thatone.length < thisone.length) { return 1; } for (int i = 0; i < thisone.length; i++) { byte thisbyte = thisone[i]; byte thatbyte = thatone[i]; if (thisbyte < thatbyte) { return -1; } if (thatbyte < thisbyte) { return 1; } } return 0; */ } @Override public String toString() { ToString ts = new ToString(this); toStringSegment(ts); ts.append("path", getColPath()); ts.append("name", getName()); return ts.toString(); } @Override public Object clone() { BwResourceContent nobj = new BwResourceContent(); copyTo(nobj); return nobj; } }