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/*******************************************************************************
 * Copyright (c) 2004, 2006 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.ant.internal.ui.debug.model;

import com.ibm.icu.text.MessageFormat;
import java.util.HashMap;
import java.util.Map;

import org.eclipse.ant.internal.ui.debug.IAntDebugConstants;
import org.eclipse.core.resources.IMarker;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.resources.IWorkspaceRunnable;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.debug.core.DebugException;
import org.eclipse.debug.core.DebugPlugin;
import org.eclipse.debug.core.model.IBreakpoint;
import org.eclipse.debug.core.model.LineBreakpoint;

/**
 * Ant line breakpoint
 */
public class AntLineBreakpoint extends LineBreakpoint {
  
  /**
   * Default constructor is required for the breakpoint manager
   * to re-create persisted breakpoints. After instantiating a breakpoint,
   * the <code>setMarker(...)</code> method is called to restore
   * this breakpoint's attributes.
   */
  public AntLineBreakpoint() {
  }
  
  /**
   * Constructs a line breakpoint on the given resource at the given
   * line number. The line number is 1-based (i.e. the first line of a
   * file is line number 1).
   * 
   * @param resource file on which to set the breakpoint
   * @param lineNumber 1-based line number of the breakpoint
   * @throws CoreException if unable to create the breakpoint
   */
  public AntLineBreakpoint(IResource resource, int lineNumber) throws CoreException {
      this(resource, lineNumber, new HashMap(), true);
  }
  
  /**
   * Constructs a line breakpoint on the given resource at the given
   * line number. The line number is 1-based (i.e. the first line of a
   * file is line number 1).
   * 
   * @param resource file on which to set the breakpoint
   * @param lineNumber 1-based line number of the breakpoint
   * @param attributes the marker attributes to set
   * @param register whether to add this breakpoint to the breakpoint manager
   * @throws CoreException if unable to create the breakpoint
   */
  public AntLineBreakpoint(final IResource resource, final int lineNumber, final Map attributes, final boolean register) throws CoreException {
      IWorkspaceRunnable wr= new IWorkspaceRunnable() {
      public void run(IProgressMonitor monitor) throws CoreException {
          IMarker marker = resource.createMarker(IAntDebugConstants.ID_ANT_LINE_BREAKPOINT_MARKER);
          setMarker(marker);
          attributes.put(IBreakpoint.ENABLED, Boolean.TRUE);
          attributes.put(IMarker.LINE_NUMBER, new Integer(lineNumber));
          attributes.put(IBreakpoint.ID, IAntDebugConstants.ID_ANT_DEBUG_MODEL);
                attributes.put(IMarker.MESSAGE, MessageFormat.format(DebugModelMessages.AntLineBreakpoint_0, new String[] {Integer.toString(lineNumber)}));
          ensureMarker().setAttributes(attributes);
                
                register(register);
      }
      };
      run(getMarkerRule(resource), wr);
  }
  
  /* (non-Javadoc)
   * @see org.eclipse.debug.core.model.IBreakpoint#getModelIdentifier()
   */
  public String getModelIdentifier() {
    return IAntDebugConstants.ID_ANT_DEBUG_MODEL;
  }

    /**
     * @return whether this breakpoint is a run to line breakpoint
     */
    public boolean isRunToLine() {
        try {
            return ensureMarker().getAttribute(IAntDebugConstants.ANT_RUN_TO_LINE, false);
        } catch (DebugException e) {
           return false;
        }
    }
    
    /**
     * Add this breakpoint to the breakpoint manager,
     * or sets it as unregistered.
     */
    private void register(boolean register) throws CoreException {
        if (register) {
            DebugPlugin.getDefault().getBreakpointManager().addBreakpoint(this);
        } else {
            setRegistered(false);
        }
    }
}
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