org.eclipse.virgo.ide.manifest.core/src/org/eclipse/virgo/ide/manifest/internal/core/model/BundleManifestHeader.java

/*********************************************************************
 * Copyright (c) 2009 - 2012 SpringSource, a division of VMware, Inc.
 *
 * This program and the accompanying materials are made
 * available under the terms of the Eclipse Public License 2.0
 * which is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
**********************************************************************/

package org.eclipse.virgo.ide.manifest.internal.core.model;

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

import org.apache.commons.lang.StringUtils;
import org.eclipse.core.resources.IMarker;
import org.eclipse.osgi.util.ManifestElement;
import org.eclipse.osgi.util.NLS;
import org.eclipse.virgo.ide.manifest.core.BundleManifestCoreMessages;
import org.osgi.framework.BundleException;

/**
 * @author Christian Dupuis
 * @since 1.0.0
 */
/**
 * TODO CD add comments
 */
public class BundleManifestHeader extends AbstractManifestElement {

    private static final int BUNDLE_MANIFEST_HEADER_TYPE = 1;

    private final int lineNumber;

    private int lines;

    private BundleManifestHeaderElement[] manifestElements;

    private String value;

    protected BundleManifestHeader(BundleManifest parent, String name, String value, int lineNumber) {
        super(parent, name);
        this.value = value;
        this.lineNumber = lineNumber;
        this.lines = 1;
    }

    public void append(String value) {
        this.value += value;
        this.lines++;
    }

    public BundleManifestHeaderElement[] getBundleManifestHeaderElements() {
        if (this.manifestElements == null) {
            init();
        }
        return this.manifestElements;
    }

    @Override
    public AbstractManifestElement[] getChildren() {
        return getBundleManifestHeaderElements();
    }

    public int getElementType() {
        return BUNDLE_MANIFEST_HEADER_TYPE;
    }

    public int getLineNumber() {
        return this.lineNumber;
    }

    public int getLinesSpan() {
        return this.lines;
    }

    public String getValue() {
        return this.value;
    }

    public void init() {
        if (this.manifestElements == null) {
            if (getValue().trim().length() > 0) {
                try {

                    // Make sure the every " is closed
                    if (StringUtils.countMatches(getValue(), "\"") % 2 != 0) {
                        throw new BundleException("");
                    }

                    List<BundleManifestHeaderElement> headerElements = new ArrayList<BundleManifestHeaderElement>();
                    ManifestElement[] elements = ManifestElement.parseHeader(getName(), getValue());
                    for (ManifestElement element : elements) {
                        headerElements.add(new BundleManifestHeaderElement(this, element));
                    }
                    this.manifestElements = headerElements.toArray(new BundleManifestHeaderElement[headerElements.size()]);
                } catch (BundleException be) {
                    String message = NLS.bind(BundleManifestCoreMessages.BundleErrorReporter_parseHeader, getName());
                    ((BundleManifest) getParent()).error(IMarker.SEVERITY_ERROR, message, getLineNumber() + 1);
                    this.manifestElements = new BundleManifestHeaderElement[0];
                }
            } else {
                this.manifestElements = new BundleManifestHeaderElement[0];
            }
        }
    }

    @Override
    public String toString() {
        StringBuilder builder = new StringBuilder();
        builder.append("[").append(this.lineNumber).append("] ").append(getName()).append(" <").append(this.lines).append("> :\n");
        for (AbstractManifestElement element : getChildren()) {
            builder.append("   ").append(element.toString());
        }
        return builder.toString();
    }
}