ContentIdImpl.java

/*
 *
 * This is a simple Content Management System (CMS)
 * Copyright (C) 2010  Imran M Yousuf (imyousuf@smartitengineering.com)
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.smartitengineering.cms.api.impl.content;

import com.smartitengineering.cms.api.content.Content;
import com.smartitengineering.cms.api.workspace.WorkspaceId;
import com.smartitengineering.cms.api.content.ContentId;
import com.smartitengineering.cms.api.factory.SmartContentAPI;
import com.smartitengineering.cms.api.impl.Utils;
import com.smartitengineering.cms.api.impl.workspace.WorkspaceIdImpl;
import com.smartitengineering.cms.api.impl.type.ContentTypeIdImpl;
import com.smartitengineering.cms.spi.SmartContentSPI;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import java.net.URI;
import java.util.Arrays;
import org.apache.commons.lang.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 *
 * @author kaisar
 */
public class ContentIdImpl implements ContentId {

  private WorkspaceId workspaceId;
  private byte[] id;
  private transient Logger logger = LoggerFactory.getLogger(getClass());

  protected Logger getLogger() {
    if (logger == null) {
      logger = Utils.getLogger(getClass());
    }
    return logger;
  }

  public void setWorkspaceId(WorkspaceId workspaceId) {
    if (workspaceId == null) {
      throw new IllegalArgumentException(String.format(ContentTypeIdImpl.STANDARD_ERROR_MSG, "Workspace Id"));
    }
    this.workspaceId = workspaceId;
  }

  public void setId(byte[] id) {
    if (id == null) {
      throw new IllegalArgumentException(String.format(ContentTypeIdImpl.STANDARD_ERROR_MSG, "Content Id"));
    }
    this.id = id;
  }

  @Override
  public Content getContent() {
    try {
      return SmartContentAPI.getInstance().getContentLoader().loadContent(this);
    }
    catch (Exception ex) {
      getLogger().warn("could not load content!", ex);
      return null;
    }
  }

  @Override
  public WorkspaceId getWorkspaceId() {
    return this.workspaceId;
  }

  @Override
  public byte[] getId() {
    return this.id;
  }

  @Override
  public String toString() {
    return new StringBuilder().append(workspaceId).append(':').append(new String(id)).toString();
  }

  @Override
  public void writeExternal(DataOutput output) throws IOException {
    output.write(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(toString()));
  }

  @Override
  public void readExternal(DataInput input) throws IOException, ClassNotFoundException {
    String idString = Utils.readStringInUTF8(input);
    if (getLogger().isDebugEnabled()) {
      getLogger().debug("Trying to parse content id: " + idString);
    }
    if (StringUtils.isBlank(idString)) {
      throw new IOException("No content!");
    }
    String[] params = idString.split(":");
    if (getLogger().isDebugEnabled()) {
      getLogger().debug("Params " + Arrays.toString(params));
    }
    if (params == null || params.length != 3) {
      throw new IOException(
          "Object should have been in the format globalNamespace:workspace-name:type-name!");
    }
    WorkspaceIdImpl workspaceIdImpl = new WorkspaceIdImpl();
    workspaceIdImpl.setGlobalNamespace(params[0]);
    workspaceIdImpl.setName(params[1]);
    setWorkspaceId(workspaceIdImpl);
    setId(org.apache.commons.codec.binary.StringUtils.getBytesUtf8(params[2]));
  }

  @Override
  public int compareTo(ContentId o) {
    if (o == null) {
      return 1;
    }
    if (equals(o)) {
      return 0;
    }
    return toString().compareTo(o.toString());
  }

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }
    if (getClass() != obj.getClass()) {
      return false;
    }
    final ContentIdImpl other = (ContentIdImpl) obj;
    if (this.workspaceId != other.workspaceId &&
        (this.workspaceId == null || !this.workspaceId.equals(other.workspaceId))) {
      return false;
    }
    if (!Arrays.equals(this.id, other.id)) {
      return false;
    }
    return true;
  }

  @Override
  public int hashCode() {
    int hash = 3;
    hash = 89 * hash + (this.workspaceId != null ? this.workspaceId.hashCode() : 0);
    hash = 89 * hash + Arrays.hashCode(this.id);
    return hash;
  }

  @Override
  public URI getUri() {
    return SmartContentSPI.getInstance().getUriProvider().getContentUri(this);
  }

  @Override
  public String getEncodedUriString() {
    URI uri = getUri();
    return uri == null ? null : uri.toASCIIString();
  }
}