krysalis-version/src/main/org/krysalis/version/analysis Analyzer.java,NONE,1.1

Update of /cvsroot/krysalis/krysalis-version/src/main/org/krysalis/version/analysis
In directory sc8-pr-cvs1:/tmp/cvs-serv6646/src/main/org/krysalis/version/analysis

Added Files:
	Analyzer.java 
Log Message:
Start on environment analysis (comparison against a fixed base)

--- NEW FILE: Analyzer.java ---
/*
 * Created on Nov 2, 2003
 */
package org.krysalis.version.analysis;

import java.util.Iterator;

import org.krysalis.version.Version;
import org.krysalis.version.VersionMarker;
import org.krysalis.version.context.VersionEnvironment;
import org.krysalis.version.context.VersionInformation;
import org.krysalis.version.context.VersionRegistry;
import org.krysalis.version.util.note.AnnotationScratchpad;

/**
 * @author arb_jack
 */
public class Analyzer {
	public static AnnotationScratchpad analyze(
		VersionEnvironment current,
		VersionEnvironment base) {
		AnnotationScratchpad analysis = new AnnotationScratchpad("Environment Analysis");
		if ((null == current) && (null == base))
			return analysis;

		if (null == current) {
			analysis.warning("No version to compare against base: " + base);
		}
		else if (null == base) {
			analysis.warning(
				"No version to compare against current: " + current);
		}
		else {
			analyzeJVM(analysis, current, base);
			analyzeVersionRegistry(
				analysis,
				current.getVersions(),
				base.getVersions());
		}
		return analysis;
	}

	public static void analyzeJVM(
		AnnotationScratchpad analysis,
		VersionEnvironment current,
		VersionEnvironment base) {
		analyzeMarkers(analysis, current.getJvmVersion(), base.getJvmVersion());
		analyzeMarkers(
			analysis,
			current.getJvmSpecificationVersion(),
			base.getJvmSpecificationVersion());
	}

	public static void analyzeVersionRegistry(
		AnnotationScratchpad analysis,
		VersionRegistry current,
		VersionRegistry base) {

		for (Iterator i = base.iterator(); i.hasNext();) {
			VersionInformation baseInfo = (VersionInformation) i.next();
			VersionInformation currentInfo =
				current.getInformation(baseInfo.getIdentifier());

			analyzeInfos(analysis, currentInfo, baseInfo);
		}
	}

	public static void analyzeInfos(
		AnnotationScratchpad analysis,
		VersionInformation current,
		VersionInformation base) {

		if ((null == current) && (null == base))
			return;

		if (null == current) {
			analysis.warning("No info to compare against base: " + base);
		}
		else if (null == base) {
			analysis.warning("No info to compare against current: " + current);
		}
		else if (!current.equals(base)) {
			analysis.info(
				"Difference " + current + " : " + base);

			analyzeMarkers(
				analysis,
				current.getVersionMarker(),
				base.getVersionMarker());
		}
		else
			analysis.verbose(
				"Match : " + base);
	}

	public static void analyzeMarkers(
		AnnotationScratchpad analysis,
		VersionMarker current,
		VersionMarker base) {

		if ((null == current) && (null == base))
			return;

		if (null == current) {
			analysis.warning("No marker to compare against base: " + base);
		}
		else if (null == base) {
			analysis.warning(
				"No marker to compare against current: " + current);
		}
		else if (!current.equals(base)) {
			analysis.info("Difference " + current + " : " + base);

			analyzeVersions(analysis, current.getVersion(), base.getVersion());
		}
		else
			analysis.verbose(
				"Match : " + base);
	}

	public static void analyzeVersions(
		AnnotationScratchpad analysis,
		Version current,
		Version base) {

		if ((null == current) && (null == base))
			return;

		if (null == current) {
			analysis.warning("No version to compare against base: " + base);
		}
		else if (null == base) {
			analysis.warning(
				"No version to compare against current: " + current);
		}
		else if (!current.equals(base)) {
			analysis.info("Difference " + current + " : " + base);

			if (!current.isCompatible(base))
				analysis.error(
					"Incompatible Versions " + current + " : " + base);
		}
		else
			analysis.verbose(
				"Match : " + base);
	}
}




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