repository/service/src/main/java/org/apache/karaf/cave/repository/service/bundlerepository/ResourceBuilder.java [282:307]:
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            Object v = clause.attrs.get(Constants.VERSION_ATTRIBUTE);
            Object sv = clause.attrs.get(Constants.PACKAGE_SPECIFICATION_VERSION);
            if ((v != null) && (sv != null)) {
                // Verify they are equal.
                if (!((String) v).trim().equals(((String) sv).trim())) {
                    throw new IllegalArgumentException(
                            "Both version and specification-version are specified, but they are not equal.");
                }
            }

            // Ensure that only the "version" attribute is used and convert
            // it to the VersionRange type.
            if ((v != null) || (sv != null)) {
                clause.attrs.remove(Constants.PACKAGE_SPECIFICATION_VERSION);
                v = (v == null) ? sv : v;
                clause.attrs.put(Constants.VERSION_ATTRIBUTE, VersionRange.parseVersionRange(v.toString()));
            }

            // If bundle version is specified, then convert its type to VersionRange.
            v = clause.attrs.get(Constants.BUNDLE_VERSION_ATTRIBUTE);
            if (v != null) {
                clause.attrs.put(Constants.BUNDLE_VERSION_ATTRIBUTE, VersionRange.parseVersionRange(v.toString()));
            }

            // Verify java.* is not imported, nor any duplicate imports.
            for (String pkgName : clause.paths) {
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repository/service/src/main/java/org/apache/karaf/cave/repository/service/bundlerepository/ResourceBuilder.java [445:471]:
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            Object v = clause.attrs.get(Constants.VERSION_ATTRIBUTE);
            Object sv = clause.attrs.get(Constants.PACKAGE_SPECIFICATION_VERSION);
            if ((v != null) && (sv != null)) {
                // Verify they are equal.
                if (!((String) v).trim().equals(((String) sv).trim())) {
                    throw new IllegalArgumentException(
                            "Both version and specification-version are specified, but they are not equal.");
                }
            }

            // Ensure that only the "version" attribute is used and convert
            // it to the VersionRange type.
            if ((v != null) || (sv != null)) {
                clause.attrs.remove(Constants.PACKAGE_SPECIFICATION_VERSION);
                v = (v == null) ? sv : v;
                clause.attrs.put(Constants.VERSION_ATTRIBUTE, VersionRange.parseVersionRange(v.toString()));
            }

            // If bundle version is specified, then convert its type to VersionRange.
            v = clause.attrs.get(Constants.BUNDLE_VERSION_ATTRIBUTE);
            if (v != null) {
                clause.attrs.put(Constants.BUNDLE_VERSION_ATTRIBUTE, VersionRange.parseVersionRange(v.toString()));
            }

            // Dynamic imports can have duplicates, so verify that java.*
            // packages are not imported.
            for (String pkgName : clause.paths) {
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