plugins/org.eclipse.epp.installer.core/src/org/eclipse/epp/installer/core/steps/ShowWarningsStep.java

package org.eclipse.epp.installer.core.steps;

import java.util.ArrayList;
import java.util.List;

import org.eclipse.core.runtime.Status;
import org.eclipse.epp.installer.core.model.InstallStep;
import org.eclipse.epp.installer.core.model.Installer;


/**
 * Shows warning list if there were any during installation process.
 */
public class ShowWarningsStep extends InstallStep {

	/**
	 * Constructor for ShowWarningsStep.
	 * 
	 * @param installer
	 *            Installer
	 */
	public ShowWarningsStep(Installer installer) {
		super(installer);
	}

	/**
	 * Generate and return warning log text.
	 * 
	 * @return String
	 */
	public String getWarningText() {
		List log = new ArrayList(getInstaller().getWarnings());
		StringBuffer text = new StringBuffer("");
		for (int i = 0; i < log.size(); i++) {
			Status status = (Status) log.get(i);
			String message = status.getMessage();
			if (message != null && !message.equals("")) {
				text.append(message);
				text.append("\n");
			}
		}
		return text.toString();
	}

	/**
	 * Return execution condition. Step need to be executed if installer warning
	 * log is not empty.
	 * 
	 * Used by installer to ensure step execution.
	 * 
	 * @return <code>true</code> if step needed to be executed, and
	 *         <code>false</code>othervise.
	 */
	public boolean canExecute() {
		List log = new ArrayList(getInstaller().getWarnings());
		if (log == null || log.size() == 0) {
			return false;
		}
		return true;
	}
}